test

extern/go-state-types/.circleci/config.yml

+version: 2.1
+orbs:
+  go: gotest/tools@0.0.9
+  codecov: codecov/codecov@1.0.2
+
+executors:
+  golang:
+    docker:
+      - image: circleci/golang:1.13
+    resource_class: small
+
+commands:
+  install-deps:
+    steps:
+      - go/install-ssh
+      - go/install: {package: git}
+  prepare:
+    parameters:
+      linux:
+        default: true
+        description: is a linux build environment?
+        type: boolean
+    steps:
+      - checkout
+      - when:
+          condition: << parameters.linux >>
+          steps:
+            - run: sudo apt-get update
+  build-all:
+
+jobs:
+  mod-tidy-check:
+    executor: golang
+    steps:
+      - install-deps
+      - prepare
+      - go/mod-download
+      - go/mod-tidy-check
+
+  build-all:
+    executor: golang
+    steps:
+      - install-deps
+      - prepare
+      - go/mod-download
+      - run:
+          command: make build
+      - store_artifacts:
+          path: go-state-types
+      - store_artifacts:
+          path: go-state-types
+
+  check-gen:
+    executor: golang
+    steps:
+      - install-deps
+      - prepare
+      - go/mod-download
+      - run:
+          name: "Install goimports"
+          command: |
+            cd / && go get golang.org/x/tools/cmd/goimports
+      - run:
+          name: "Ensure we don't need to run 'make gen'"
+          command: |
+            make gen && git diff --exit-code
+
+  test-all:
+    executor: golang
+    steps:
+      - install-deps
+      - prepare
+      - go/mod-download
+      - run:
+          command: |
+            make test-coverage
+            mkdir -p /tmp/artifacts
+            mv coverage.out /tmp/artifacts/coverage.out
+      - codecov/upload:
+          file: /tmp/artifacts/coverage.out
+      - store_artifacts:
+          path: go-state-types
+
+  lint: &lint
+    description: |
+      Run golangci-lint.
+    parameters:
+      executor:
+        type: executor
+        default: golang
+      golangci-lint-version:
+        type: string
+        default: 1.23.1
+      concurrency:
+        type: string
+        default: '2'
+        description: |
+          Concurrency used to run linters. Defaults to 2 because NumCPU is not
+          aware of container CPU limits.
+      args:
+        type: string
+        default: ''
+        description: |
+          Arguments to pass to golangci-lint
+    executor: << parameters.executor >>
+    steps:
+      - install-deps
+      - prepare
+      - run:
+          command: make build
+      - go/install-golangci-lint:
+          gobin: $HOME/.local/bin
+          version: << parameters.golangci-lint-version >>
+      - run:
+          name: Lint
+          command: |
+            $HOME/.local/bin/golangci-lint run -v --skip-dirs-use-default=false\
+              --concurrency << parameters.concurrency >> << parameters.args >>
+
+  lint-all:
+    <<: *lint
+
+workflows:
+  version: 2.1
+  ci:
+    jobs:
+      - lint-all
+      - mod-tidy-check
+      - build-all
+      - test-all
+      - check-gen

extern/go-state-types/COPYRIGHT

+Copyright 2020. Protocol Labs, Inc.
+
+This library is dual-licensed under Apache 2.0 and MIT terms.

extern/go-state-types/LICENSE-APACHE

+Copyright 2020. Protocol Labs, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

extern/go-state-types/LICENSE-MIT

+Copyright 2020. Protocol Labs, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

extern/go-state-types/Makefile

+GO_BIN ?= go
+GOLINT ?= golangci-lint
+
+all: build lint test tidy
+.PHONY: all
+
+build:
+	$(GO_BIN) build ./...
+.PHONY: build
+
+test:
+	$(GO_BIN) test ./...
+.PHONY: test
+
+test-coverage:
+	$(GO_BIN) test -coverprofile=coverage.out ./...
+.PHONY: test-coverage
+
+tidy:
+	$(GO_BIN) mod tidy
+.PHONY: tidy
+
+gen:
+	$(GO_BIN) run ./gen/gen.go
+.PHONY: gen
+
+lint:
+	$(GOLINT) run ./...
+.PHONY: lint
+

extern/go-state-types/README.md

+# Filecoin state types
+[![CircleCI](https://circleci.com/gh/filecoin-project/go-state-types.svg?style=svg)](https://circleci.com/gh/filecoin-project/go-state-types)
+[![codecov](https://codecov.io/gh/filecoin-project/go-state-types/branch/master/graph/badge.svg)](https://codecov.io/gh/filecoin-project/go-state-types)
+
+This repository contains primitive and low level types used in the Filecoin blockchain state representation.
+
+These are primarily intended for use by [Actors](https://github.com/filecoin-project/specs-actors) and other
+modules that read chain state directly.
+
+## Versioning
+
+Blockchain state versioning does not naturally align with common semantic versioning conventions.
+
+Any change in behaviour, including repairing any error that may have affected blockchain evaluation,
+must be released in a major version change. We intend that to be a rare event for the contents of 
+this repository.
+
+## License
+This repository is dual-licensed under Apache 2.0 and MIT terms.
+
+Copyright 2020. Protocol Labs, Inc.

extern/go-state-types/abi/actor.go

+package abi
+
+import "strconv"
+
+// A sequential number assigned to an actor when created by the InitActor.
+// This ID is embedded in ID-type addresses.
+type ActorID uint64
+
+func (e ActorID) String() string {
+	return strconv.FormatInt(int64(e), 10)
+}
+
+// MethodNum is an integer that represents a particular method
+// in an actor's function table. These numbers are used to compress
+// invocation of actor code, and to decouple human language concerns
+// about method names from the ability to uniquely refer to a particular
+// method.
+//
+// Consider MethodNum numbers to be similar in concerns as for
+// offsets in function tables (in programming languages), and for
+// tags in ProtocolBuffer fields. Tags in ProtocolBuffers recommend
+// assigning a unique tag to a field and never reusing that tag.
+// If a field is no longer used, the field name may change but should
+// still remain defined in the code to ensure the tag number is not
+// reused accidentally. The same should apply to the MethodNum
+// associated with methods in Filecoin VM Actors.
+type MethodNum uint64
+
+func (e MethodNum) String() string {
+	return strconv.FormatInt(int64(e), 10)
+}
+
+// Multiaddrs is a byte array representing a Libp2p MultiAddress
+type Multiaddrs = []byte
+
+// PeerID is a byte array representing a Libp2p PeerID
+type PeerID = []byte
+

extern/go-state-types/abi/cbor_gen.go

+// Code generated by github.com/whyrusleeping/cbor-gen. DO NOT EDIT.
+
+package abi
+
+import (
+	"fmt"
+	"io"
+
+	cbg "github.com/whyrusleeping/cbor-gen"
+	xerrors "golang.org/x/xerrors"
+)
+
+var _ = xerrors.Errorf
+
+var lengthBufPieceInfo = []byte{130}
+
+func (t *PieceInfo) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
+	if _, err := w.Write(lengthBufPieceInfo); err != nil {
+		return err
+	}
+
+	scratch := make([]byte, 9)
+
+	// t.Size (abi.PaddedPieceSize) (uint64)
+
+	if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajUnsignedInt, uint64(t.Size)); err != nil {
+		return err
+	}
+
+	// t.PieceCID (cid.Cid) (struct)
+
+	if err := cbg.WriteCidBuf(scratch, w, t.PieceCID); err != nil {
+		return xerrors.Errorf("failed to write cid field t.PieceCID: %w", err)
+	}
+
+	return nil
+}
+
+func (t *PieceInfo) UnmarshalCBOR(r io.Reader) error {
+	*t = PieceInfo{}
+
+	br := cbg.GetPeeker(r)
+	scratch := make([]byte, 8)
+
+	maj, extra, err := cbg.CborReadHeaderBuf(br, scratch)
+	if err != nil {
+		return err
+	}
+	if maj != cbg.MajArray {
+		return fmt.Errorf("cbor input should be of type array")
+	}
+
+	if extra != 2 {
+		return fmt.Errorf("cbor input had wrong number of fields")
+	}
+
+	// t.Size (abi.PaddedPieceSize) (uint64)
+
+	{
+
+		maj, extra, err = cbg.CborReadHeaderBuf(br, scratch)
+		if err != nil {
+			return err
+		}
+		if maj != cbg.MajUnsignedInt {
+			return fmt.Errorf("wrong type for uint64 field")
+		}
+		t.Size = PaddedPieceSize(extra)
+
+	}
+	// t.PieceCID (cid.Cid) (struct)
+
+	{
+
+		c, err := cbg.ReadCid(br)
+		if err != nil {
+			return xerrors.Errorf("failed to read cid field t.PieceCID: %w", err)
+		}
+
+		t.PieceCID = c
+
+	}
+	return nil
+}
+
+var lengthBufSectorID = []byte{130}
+
+func (t *SectorID) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
+	if _, err := w.Write(lengthBufSectorID); err != nil {
+		return err
+	}
+
+	scratch := make([]byte, 9)
+
+	// t.Miner (abi.ActorID) (uint64)
+
+	if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajUnsignedInt, uint64(t.Miner)); err != nil {
+		return err
+	}
+
+	// t.Number (abi.SectorNumber) (uint64)
+
+	if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajUnsignedInt, uint64(t.Number)); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (t *SectorID) UnmarshalCBOR(r io.Reader) error {
+	*t = SectorID{}
+
+	br := cbg.GetPeeker(r)
+	scratch := make([]byte, 8)
+
+	maj, extra, err := cbg.CborReadHeaderBuf(br, scratch)
+	if err != nil {
+		return err
+	}
+	if maj != cbg.MajArray {
+		return fmt.Errorf("cbor input should be of type array")
+	}
+
+	if extra != 2 {
+		return fmt.Errorf("cbor input had wrong number of fields")
+	}
+
+	// t.Miner (abi.ActorID) (uint64)
+
+	{
+
+		maj, extra, err = cbg.CborReadHeaderBuf(br, scratch)
+		if err != nil {
+			return err
+		}
+		if maj != cbg.MajUnsignedInt {
+			return fmt.Errorf("wrong type for uint64 field")
+		}
+		t.Miner = ActorID(extra)
+
+	}
+	// t.Number (abi.SectorNumber) (uint64)
+
+	{
+
+		maj, extra, err = cbg.CborReadHeaderBuf(br, scratch)
+		if err != nil {
+			return err
+		}
+		if maj != cbg.MajUnsignedInt {
+			return fmt.Errorf("wrong type for uint64 field")
+		}
+		t.Number = SectorNumber(extra)
+
+	}
+	return nil
+}

extern/go-state-types/abi/chain.go

+package abi
+
+import (
+	"strconv"
+
+	"github.com/filecoin-project/go-state-types/big"
+)
+
+// Epoch number of the chain state, which acts as a proxy for time within the VM.
+type ChainEpoch int64
+
+func (e ChainEpoch) String() string {
+	return strconv.FormatInt(int64(e), 10)
+}
+
+// TokenAmount is an amount of Filecoin tokens. This type is used within
+// the VM in message execution, to account movement of tokens, payment
+// of VM gas, and more.
+//
+// BigInt types are aliases rather than new types because the latter introduce incredible amounts of noise converting to
+// and from types in order to manipulate values. We give up some type safety for ergonomics.
+type TokenAmount = big.Int
+
+func NewTokenAmount(t int64) TokenAmount {
+	return big.NewInt(t)
+}
+
+// Randomness is a string of random bytes
+type Randomness []byte
+
+// RandomnessLength is the length of the randomness slice.
+const RandomnessLength = 32
+

extern/go-state-types/abi/cid.go

+package abi
+
+import (
+	cid "github.com/ipfs/go-cid"
+	mh "github.com/multiformats/go-multihash"
+)
+
+var (
+	// HashFunction is the default hash function for computing CIDs.
+	//
+	// This is currently Blake2b-256.
+	HashFunction = uint64(mh.BLAKE2B_MIN + 31)
+
+	// When producing a CID for an IPLD block less than or equal to CIDInlineLimit
+	// bytes in length, the identity hash function will be used instead of
+	// HashFunction. This will effectively "inline" the block into the CID, allowing
+	// it to be extracted directly from the CID with no disk/network operations.
+	//
+	// This is currently -1 for "disabled".
+	//
+	// This is exposed for testing. Do not modify unless you know what you're doing.
+	CIDInlineLimit = -1
+)
+
+type cidBuilder struct {
+	codec uint64
+}
+
+func (cidBuilder) WithCodec(c uint64) cid.Builder {
+	return cidBuilder{codec: c}
+}
+
+func (b cidBuilder) GetCodec() uint64 {
+	return b.codec
+}
+
+func (b cidBuilder) Sum(data []byte) (cid.Cid, error) {
+	hf := HashFunction
+	if len(data) <= CIDInlineLimit {
+		hf = mh.IDENTITY
+	}
+	return cid.V1Builder{Codec: b.codec, MhType: hf}.Sum(data)
+}
+
+// CidBuilder is the default CID builder for Filecoin.
+//
+// - The default codec is CBOR. This can be changed with CidBuilder.WithCodec.
+// - The default hash function is 256bit blake2b.
+var CidBuilder cid.Builder = cidBuilder{codec: cid.DagCBOR}

extern/go-state-types/abi/deal.go

+package abi
+
+import "github.com/filecoin-project/go-state-types/big"
+
+type DealID uint64
+
+// BigInt types are aliases rather than new types because the latter introduce incredible amounts of noise
+// converting to and from types in order to manipulate values.
+// We give up some type safety for ergonomics.
+type DealWeight = big.Int // units: byte-epochs

extern/go-state-types/abi/empty.go

+package abi
+
+import (
+	"fmt"
+	"io"
+
+	cbg "github.com/whyrusleeping/cbor-gen"
+)
+
+// The empty value represents absence of a value. It is used for parameter and return types for actor methods
+// that don't take/return any data. This saves a byte in serialization of messages and receipts: the serialized
+// form is an empty byte slice, rather than a byte slice containing a single byte CBOR encoding of nil/empty/etc.
+//
+// The only expected use of this is as the type of a nil reference. Don't instantiate this type.
+//
+// This is primarily necessary due to Go's lack of a void type and our interface-based serialization scheme.
+type EmptyValue struct{}
+
+// A typed nil pointer to EmptyValue.
+var Empty *EmptyValue = nil
+
+var _ cbg.CBORMarshaler = (*EmptyValue)(nil)
+var _ cbg.CBORUnmarshaler = (*EmptyValue)(nil)
+
+func (v *EmptyValue) MarshalCBOR(_ io.Writer) error {
+	// An attempt to serialize a non-nil value indicates a caller mis-using this type.
+	if v != nil {
+		return fmt.Errorf("cannot marshal empty value, try nil instead")
+	}
+	// Allow nil to write zero bytes as a convenience so callers don't need to nil-check all values before
+	// attempting serialization.
+	return nil
+}
+
+func (v *EmptyValue) UnmarshalCBOR(_ io.Reader) error {
+	// Read zero bytes.
+	return nil
+}
+

extern/go-state-types/abi/key.go

+package abi
+
+import (
+	"encoding/binary"
+	"errors"
+
+	"github.com/filecoin-project/go-address"
+	"github.com/ipfs/go-cid"
+)
+
+// Keyer defines an interface required to put values in mapping.
+type Keyer interface {
+	Key() string
+}
+
+// Adapts an address as a mapping key.
+type AddrKey address.Address
+
+func (k AddrKey) Key() string {
+	return string(address.Address(k).Bytes())
+}
+
+type CidKey cid.Cid
+
+func (k CidKey) Key() string {
+	return cid.Cid(k).KeyString()
+}
+
+// Adapts an int64 as a mapping key.
+type intKey struct {
+	int64
+}
+
+//noinspection GoExportedFuncWithUnexportedType
+func IntKey(k int64) intKey {
+	return intKey{k}
+}
+
+func (k intKey) Key() string {
+	buf := make([]byte, 10)
+	n := binary.PutVarint(buf, k.int64)
+	return string(buf[:n])
+}
+
+//noinspection GoUnusedExportedFunction
+func ParseIntKey(k string) (int64, error) {
+	i, n := binary.Varint([]byte(k))
+	if n != len(k) {
+		return 0, errors.New("failed to decode varint key")
+	}
+	return i, nil
+}
+
+// Adapts a uint64 as a mapping key.
+type uintKey struct {
+	uint64
+}
+
+//noinspection GoExportedFuncWithUnexportedType
+func UIntKey(k uint64) uintKey {
+	return uintKey{k}
+}
+
+func (k uintKey) Key() string {
+	buf := make([]byte, 10)
+	n := binary.PutUvarint(buf, k.uint64)
+	return string(buf[:n])
+}
+
+func ParseUIntKey(k string) (uint64, error) {
+	i, n := binary.Uvarint([]byte(k))
+	if n != len(k) {
+		return 0, errors.New("failed to decode varint key")
+	}
+	return i, nil
+}

extern/go-state-types/abi/key_test.go

+package abi_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/filecoin-project/go-address"
+	"github.com/filecoin-project/go-state-types/abi"
+)
+
+func newIDAddr(t testing.TB, id uint64) address.Address {
+	address, err := address.NewIDAddress(id)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return address
+}
+
+func newActorAddr(t testing.TB, data string) address.Address {
+	address, err := address.NewActorAddress([]byte(data))
+	if err != nil {
+		t.Fatal(err)
+	}
+	return address
+}
+
+func TestAddrKey(t *testing.T) {
+	id_address_1 := newIDAddr(t, 101)
+	id_address_2 := newIDAddr(t, 102)
+	actor_address_1 := newActorAddr(t, "actor1")
+	actor_address_2 := newActorAddr(t, "222")
+
+	t.Run("address to key string conversion", func(t *testing.T) {
+		assert.Equal(t, "\x00\x65", abi.AddrKey(id_address_1).Key())
+		assert.Equal(t, "\x00\x66", abi.AddrKey(id_address_2).Key())
+		assert.Equal(t, "\x02\x58\xbe\x4f\xd7\x75\xa0\xc8\xcd\x9a\xed\x86\x4e\x73\xab\xb1\x86\x46\x5f\xef\xe1", abi.AddrKey(actor_address_1).Key())
+		assert.Equal(t, "\x02\xaa\xd0\xb2\x98\xa9\xde\xab\xbb\xb6\u007f\x80\x5f\x66\xaa\x68\x8c\xdd\x89\xad\xf5", abi.AddrKey(actor_address_2).Key())
+	})
+}

extern/go-state-types/abi/piece.go

+package abi
+
+import (
+	"math/bits"
+
+	cid "github.com/ipfs/go-cid"
+	"golang.org/x/xerrors"
+)
+
+// UnpaddedPieceSize is the size of a piece, in bytes
+type UnpaddedPieceSize uint64
+type PaddedPieceSize uint64
+
+func (s UnpaddedPieceSize) Padded() PaddedPieceSize {
+	return PaddedPieceSize(s + (s / 127))
+}
+
+func (s UnpaddedPieceSize) Validate() error {
+	if s < 127 {
+		return xerrors.New("minimum piece size is 127 bytes")
+	}
+
+	// is 127 * 2^n
+	if uint64(s)>>bits.TrailingZeros64(uint64(s)) != 127 {
+		return xerrors.New("unpadded piece size must be a power of 2 multiple of 127")
+	}
+
+	return nil
+}
+
+func (s PaddedPieceSize) Unpadded() UnpaddedPieceSize {
+	return UnpaddedPieceSize(s - (s / 128))
+}
+
+func (s PaddedPieceSize) Validate() error {
+	if s < 128 {
+		return xerrors.New("minimum padded piece size is 128 bytes")
+	}
+
+	if bits.OnesCount64(uint64(s)) != 1 {
+		return xerrors.New("padded piece size must be a power of 2")
+	}
+
+	return nil
+}
+
+type PieceInfo struct {
+	Size     PaddedPieceSize // Size in nodes. For BLS12-381 (capacity 254 bits), must be >= 16. (16 * 8 = 128)
+	PieceCID cid.Cid
+}

extern/go-state-types/abi/piece_test.go

+package abi
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPieceSize(t *testing.T) {
+	// happy
+	require.NoError(t, UnpaddedPieceSize(127).Validate())
+	require.NoError(t, UnpaddedPieceSize(1016).Validate())
+	require.NoError(t, UnpaddedPieceSize(34091302912).Validate())
+
+	require.NoError(t, PaddedPieceSize(128).Validate())
+	require.NoError(t, PaddedPieceSize(1024).Validate())
+	require.NoError(t, PaddedPieceSize(34359738368).Validate())
+
+	// convert
+	require.Equal(t, PaddedPieceSize(128), UnpaddedPieceSize(127).Padded())
+	require.Equal(t, PaddedPieceSize(1024), UnpaddedPieceSize(1016).Padded())
+	require.Equal(t, PaddedPieceSize(34359738368), UnpaddedPieceSize(34091302912).Padded())
+
+	require.Equal(t, UnpaddedPieceSize(127), PaddedPieceSize(128).Unpadded())
+	require.Equal(t, UnpaddedPieceSize(1016), PaddedPieceSize(1024).Unpadded())
+	require.Equal(t, UnpaddedPieceSize(34091302912), PaddedPieceSize(34359738368).Unpadded())
+
+	// swap
+	require.NoError(t, UnpaddedPieceSize(127).Padded().Validate())
+	require.NoError(t, UnpaddedPieceSize(1016).Padded().Validate())
+	require.NoError(t, UnpaddedPieceSize(34091302912).Padded().Validate())
+
+	require.NoError(t, PaddedPieceSize(128).Unpadded().Validate())
+	require.NoError(t, PaddedPieceSize(1024).Unpadded().Validate())
+	require.NoError(t, PaddedPieceSize(34359738368).Unpadded().Validate())
+
+	// roundtrip
+	require.NoError(t, UnpaddedPieceSize(127).Padded().Unpadded().Validate())
+	require.NoError(t, UnpaddedPieceSize(1016).Padded().Unpadded().Validate())
+	require.NoError(t, UnpaddedPieceSize(34091302912).Padded().Unpadded().Validate())
+
+	require.NoError(t, PaddedPieceSize(128).Unpadded().Padded().Validate())
+	require.NoError(t, PaddedPieceSize(1024).Unpadded().Padded().Validate())
+	require.NoError(t, PaddedPieceSize(34359738368).Unpadded().Padded().Validate())
+
+	// unhappy
+	require.Error(t, UnpaddedPieceSize(9).Validate())
+	require.Error(t, UnpaddedPieceSize(128).Validate())
+	require.Error(t, UnpaddedPieceSize(99453687).Validate())
+	require.Error(t, UnpaddedPieceSize(1016+0x1000000).Validate())
+
+	require.Error(t, PaddedPieceSize(8).Validate())
+	require.Error(t, PaddedPieceSize(127).Validate())
+	require.Error(t, PaddedPieceSize(99453687).Validate())
+	require.Error(t, PaddedPieceSize(0xc00).Validate())
+	require.Error(t, PaddedPieceSize(1025).Validate())
+}

extern/go-state-types/abi/sector.go

+package abi
+
+import (
+	"fmt"
+	"math"
+	"strconv"
+
+	"golang.org/x/xerrors"
+
+	"github.com/filecoin-project/go-state-types/big"
+)
+
+// SectorNumber is a numeric identifier for a sector. It is usually relative to a miner.
+type SectorNumber uint64
+
+func (s SectorNumber) String() string {
+	return strconv.FormatUint(uint64(s), 10)
+}
+
+// The maximum assignable sector number.
+// Raising this would require modifying our AMT implementation.
+const MaxSectorNumber = math.MaxInt64
+
+// SectorSize indicates one of a set of possible sizes in the network.
+// Ideally, SectorSize would be an enum
+// type SectorSize enum {
+//   1KiB = 1024
+//   1MiB = 1048576
+//   1GiB = 1073741824
+//   1TiB = 1099511627776
+//   1PiB = 1125899906842624
+//   1EiB = 1152921504606846976
+//   max  = 18446744073709551615
+// }
+type SectorSize uint64
+
+// Formats the size as a decimal string.
+func (s SectorSize) String() string {
+	return strconv.FormatUint(uint64(s), 10)
+}
+
+// Abbreviates the size as a human-scale number.
+// This approximates (truncates) the size unless it is a power of 1024.
+func (s SectorSize) ShortString() string {
+	var biUnits = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB"}
+	unit := 0
+	for s >= 1024 && unit < len(biUnits)-1 {
+		s /= 1024
+		unit++
+	}
+	return fmt.Sprintf("%d%s", s, biUnits[unit])
+}
+
+type SectorID struct {
+	Miner  ActorID
+	Number SectorNumber
+}
+
+// The unit of storage power (measured in bytes)
+type StoragePower = big.Int
+
+type SectorQuality = big.Int
+
+func NewStoragePower(n int64) StoragePower {
+	return big.NewInt(n)
+}
+
+// These enumerations must match the proofs library and never change.
+type RegisteredSealProof int64
+
+const (
+	RegisteredSealProof_StackedDrg2KiBV1   = RegisteredSealProof(0)
+	RegisteredSealProof_StackedDrg8MiBV1   = RegisteredSealProof(1)
+	RegisteredSealProof_StackedDrg16MiBV1  = RegisteredSealProof(2)
+	RegisteredSealProof_StackedDrg32MiBV1  = RegisteredSealProof(3)
+	RegisteredSealProof_StackedDrg64MiBV1  = RegisteredSealProof(4)
+	RegisteredSealProof_StackedDrg128MiBV1 = RegisteredSealProof(5)
+	RegisteredSealProof_StackedDrg256MiBV1 = RegisteredSealProof(6)
+	RegisteredSealProof_StackedDrg512MiBV1 = RegisteredSealProof(7)
+	RegisteredSealProof_StackedDrg32GiBV1  = RegisteredSealProof(8)
+	RegisteredSealProof_StackedDrg64GiBV1  = RegisteredSealProof(9)
+
+	RegisteredSealProof_StackedDrg2KiBV1_1   = RegisteredSealProof(10)
+	RegisteredSealProof_StackedDrg8MiBV1_1   = RegisteredSealProof(11)
+	RegisteredSealProof_StackedDrg16MiBV1_1  = RegisteredSealProof(12)
+	RegisteredSealProof_StackedDrg32MiBV1_1  = RegisteredSealProof(13)
+	RegisteredSealProof_StackedDrg64MiBV1_1  = RegisteredSealProof(14)
+	RegisteredSealProof_StackedDrg128MiBV1_1 = RegisteredSealProof(15)
+	RegisteredSealProof_StackedDrg256MiBV1_1 = RegisteredSealProof(16)
+	RegisteredSealProof_StackedDrg512MiBV1_1 = RegisteredSealProof(17)
+	RegisteredSealProof_StackedDrg32GiBV1_1  = RegisteredSealProof(18)
+	RegisteredSealProof_StackedDrg64GiBV1_1  = RegisteredSealProof(19)
+)
+
+type RegisteredPoStProof int64
+
+const (
+	RegisteredPoStProof_StackedDrgWinning2KiBV1   = RegisteredPoStProof(0)
+	RegisteredPoStProof_StackedDrgWinning8MiBV1   = RegisteredPoStProof(1)
+	RegisteredPoStProof_StackedDrgWinning16MiBV1  = RegisteredPoStProof(2)
+	RegisteredPoStProof_StackedDrgWinning32MiBV1  = RegisteredPoStProof(3)
+	RegisteredPoStProof_StackedDrgWinning64MiBV1  = RegisteredPoStProof(4)
+	RegisteredPoStProof_StackedDrgWinning128MiBV1 = RegisteredPoStProof(5)
+	RegisteredPoStProof_StackedDrgWinning256MiBV1 = RegisteredPoStProof(6)
+	RegisteredPoStProof_StackedDrgWinning512MiBV1 = RegisteredPoStProof(7)
+	RegisteredPoStProof_StackedDrgWinning32GiBV1  = RegisteredPoStProof(8)
+	RegisteredPoStProof_StackedDrgWinning64GiBV1  = RegisteredPoStProof(9)
+
+	RegisteredPoStProof_StackedDrgWindow2KiBV1    = RegisteredPoStProof(10)
+	RegisteredPoStProof_StackedDrgWindow8MiBV1    = RegisteredPoStProof(11)
+	RegisteredPoStProof_StackedDrgWindow16MiBV1   = RegisteredPoStProof(12)
+	RegisteredPoStProof_StackedDrgWindow32MiBV1   = RegisteredPoStProof(13)
+	RegisteredPoStProof_StackedDrgWindow64MiBV1   = RegisteredPoStProof(14)
+	RegisteredPoStProof_StackedDrgWindow128MiBV1  = RegisteredPoStProof(15)
+	RegisteredPoStProof_StackedDrgWindow256MiBV1  = RegisteredPoStProof(16)
+	RegisteredPoStProof_StackedDrgWindow512MiBV1  = RegisteredPoStProof(17)
+	RegisteredPoStProof_StackedDrgWindow32GiBV1   = RegisteredPoStProof(18)
+	RegisteredPoStProof_StackedDrgWindow64GiBV1   = RegisteredPoStProof(19)
+)
+
+type RegisteredAggregationProof int64
+
+const (
+	RegisteredAggregationProof_SnarkPackV1 = RegisteredAggregationProof(0)
+)
+
+// Metadata about a seal proof type.
+type SealProofInfo struct {
+	// The proof sizes are 192 * the number of "porep" partitions.
+	// https://github.com/filecoin-project/rust-fil-proofs/blob/64390b6fcedb04dd1fdbe43c82b1e91c1439cea2/filecoin-proofs/src/constants.rs#L68-L80
+	ProofSize        uint64
+	SectorSize       SectorSize
+	WinningPoStProof RegisteredPoStProof
+	WindowPoStProof  RegisteredPoStProof
+}
+
+const (
+	ss2KiB   = 2 << 10
+	ss8MiB   = 8 << 20
+	ss16MiB  = 16 << 20
+	ss32MiB  = 32 << 20
+	ss64MiB  = 64 << 20
+	ss128MiB = 128 << 20
+	ss256MiB = 256 << 20
+	ss512MiB = 512 << 20
+	ss32GiB  = 32 << 30
+	ss64GiB  = 64 << 30
+)
+
+var SealProofInfos = map[RegisteredSealProof]*SealProofInfo{
+	RegisteredSealProof_StackedDrg2KiBV1: {
+		ProofSize:        192,
+		SectorSize:       ss2KiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning2KiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow2KiBV1,
+	},
+
+	RegisteredSealProof_StackedDrg8MiBV1: {
+		ProofSize:        192,
+		SectorSize:       ss8MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning8MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow8MiBV1,
+	},
+
+	RegisteredSealProof_StackedDrg16MiBV1: {
+		ProofSize:        192,
+		SectorSize:       ss16MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning16MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow16MiBV1,
+	},
+	RegisteredSealProof_StackedDrg32MiBV1: {
+		ProofSize:        192,
+		SectorSize:       ss32MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning32MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow32MiBV1,
+	},
+	RegisteredSealProof_StackedDrg64MiBV1: {
+		ProofSize:        192,
+		SectorSize:       ss64MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning64MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow64MiBV1,
+	},
+	RegisteredSealProof_StackedDrg128MiBV1: {
+		ProofSize:        192,
+		SectorSize:       ss128MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning128MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow128MiBV1,
+	},
+	RegisteredSealProof_StackedDrg256MiBV1: {
+		ProofSize:        192,
+		SectorSize:       ss256MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning256MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow256MiBV1,
+	},
+
+	RegisteredSealProof_StackedDrg512MiBV1: {
+		ProofSize:        192,
+		SectorSize:       ss512MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning512MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow512MiBV1,
+	},
+	RegisteredSealProof_StackedDrg32GiBV1: {
+		ProofSize:        1920,
+		SectorSize:       ss32GiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning32GiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow32GiBV1,
+	},
+	RegisteredSealProof_StackedDrg64GiBV1: {
+		ProofSize:        1920,
+		SectorSize:       ss64GiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning64GiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow64GiBV1,
+	},
+
+	RegisteredSealProof_StackedDrg2KiBV1_1: {
+		ProofSize:        192,
+		SectorSize:       ss2KiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning2KiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow2KiBV1,
+	},
+
+	RegisteredSealProof_StackedDrg8MiBV1_1: {
+		ProofSize:        192,
+		SectorSize:       ss8MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning8MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow8MiBV1,
+	},
+	RegisteredSealProof_StackedDrg16MiBV1_1: {
+		ProofSize:        192,
+		SectorSize:       ss16MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning16MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow16MiBV1,
+	},
+	RegisteredSealProof_StackedDrg32MiBV1_1: {
+		ProofSize:        192,
+		SectorSize:       ss32MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning32MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow32MiBV1,
+	},
+	RegisteredSealProof_StackedDrg64MiBV1_1: {
+		ProofSize:        192,
+		SectorSize:       ss64MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning64MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow64MiBV1,
+	},
+	RegisteredSealProof_StackedDrg128MiBV1_1: {
+		ProofSize:        192,
+		SectorSize:       ss128MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning128MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow128MiBV1,
+	},
+	RegisteredSealProof_StackedDrg256MiBV1_1: {
+		ProofSize:        192,
+		SectorSize:       ss256MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning256MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow256MiBV1,
+	},
+	RegisteredSealProof_StackedDrg512MiBV1_1: {
+		ProofSize:        192,
+		SectorSize:       ss512MiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning512MiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow512MiBV1,
+	},
+	RegisteredSealProof_StackedDrg32GiBV1_1: {
+		ProofSize:        1920,
+		SectorSize:       ss32GiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning32GiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow32GiBV1,
+	},
+	RegisteredSealProof_StackedDrg64GiBV1_1: {
+		ProofSize:        1920,
+		SectorSize:       ss64GiB,
+		WinningPoStProof: RegisteredPoStProof_StackedDrgWinning64GiBV1,
+		WindowPoStProof:  RegisteredPoStProof_StackedDrgWindow64GiBV1,
+	},
+}
+
+// ProofSize returns the size of seal proofs for the given sector type.
+func (p RegisteredSealProof) ProofSize() (uint64, error) {
+	info, ok := SealProofInfos[p]
+	if !ok {
+		return 0, xerrors.Errorf("unsupported proof type: %v", p)
+	}
+	return info.ProofSize, nil
+}
+
+func (p RegisteredSealProof) SectorSize() (SectorSize, error) {
+	info, ok := SealProofInfos[p]
+	if !ok {
+		return 0, xerrors.Errorf("unsupported proof type: %v", p)
+	}
+	return info.SectorSize, nil
+}
+
+// RegisteredWinningPoStProof produces the PoSt-specific RegisteredProof corresponding
+// to the receiving RegisteredProof.
+func (p RegisteredSealProof) RegisteredWinningPoStProof() (RegisteredPoStProof, error) {
+	info, ok := SealProofInfos[p]
+	if !ok {
+		return 0, xerrors.Errorf("unsupported proof type: %v", p)
+	}
+	return info.WinningPoStProof, nil
+}
+
+// RegisteredWindowPoStProof produces the PoSt-specific RegisteredProof corresponding
+// to the receiving RegisteredProof.
+func (p RegisteredSealProof) RegisteredWindowPoStProof() (RegisteredPoStProof, error) {
+	info, ok := SealProofInfos[p]
+	if !ok {
+		return 0, xerrors.Errorf("unsupported proof type: %v", p)
+	}
+	return info.WindowPoStProof, nil
+}
+
+// Metadata about a PoSt proof type.
+type PoStProofInfo struct {
+	SectorSize SectorSize
+
+	// Size of a single proof.
+	ProofSize uint64
+}
+
+var PoStProofInfos = map[RegisteredPoStProof]*PoStProofInfo{
+	RegisteredPoStProof_StackedDrgWinning2KiBV1: {
+		SectorSize: ss2KiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWinning8MiBV1: {
+		SectorSize: ss8MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWinning16MiBV1: {
+		SectorSize: ss16MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWinning32MiBV1: {
+		SectorSize: ss32MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWinning64MiBV1: {
+		SectorSize: ss64MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWinning128MiBV1: {
+		SectorSize: ss128MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWinning256MiBV1: {
+		SectorSize: ss256MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWinning512MiBV1: {
+		SectorSize: ss512MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWinning32GiBV1: {
+		SectorSize: ss32GiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWinning64GiBV1: {
+		SectorSize: ss64GiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWindow2KiBV1: {
+		SectorSize: ss2KiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWindow8MiBV1: {
+		SectorSize: ss8MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWindow16MiBV1: {
+		SectorSize: ss16MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWindow32MiBV1: {
+		SectorSize: ss32MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWindow64MiBV1: {
+		SectorSize: ss64MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWindow128MiBV1: {
+		SectorSize: ss128MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWindow256MiBV1: {
+		SectorSize: ss256MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWindow512MiBV1: {
+		SectorSize: ss512MiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWindow32GiBV1: {
+		SectorSize: ss32GiB,
+		ProofSize:  192,
+	},
+	RegisteredPoStProof_StackedDrgWindow64GiBV1: {
+		SectorSize: ss64GiB,
+		ProofSize:  192,
+	},
+}
+
+func (p RegisteredPoStProof) SectorSize() (SectorSize, error) {
+	info, ok := PoStProofInfos[p]
+	if !ok {
+		return 0, xerrors.Errorf("unsupported proof type: %v", p)
+	}
+	return info.SectorSize, nil
+}
+
+// ProofSize returns the size of window post proofs for the given sector type.
+func (p RegisteredPoStProof) ProofSize() (uint64, error) {
+	info, ok := PoStProofInfos[p]
+	if !ok {
+		return 0, xerrors.Errorf("unsupported proof type: %v", p)
+	}
+	return info.ProofSize, nil
+}
+
+type SealRandomness Randomness
+type InteractiveSealRandomness Randomness
+type PoStRandomness Randomness

extern/go-state-types/abi/sector_test.go

+package abi_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/filecoin-project/go-state-types/abi"
+)
+
+func TestSectorSizeString(t *testing.T) {
+	assert.Equal(t, "0", abi.SectorSize(0).String())
+	assert.Equal(t, "1", abi.SectorSize(1).String())
+	assert.Equal(t, "1024", abi.SectorSize(1024).String())
+	assert.Equal(t, "1234", abi.SectorSize(1234).String())
+	assert.Equal(t, "1125899906842624", abi.SectorSize(1125899906842624).String())
+}
+
+func TestSectorSizeShortString(t *testing.T) {
+	kib := uint64(1024)
+	pib := uint64(1125899906842624)
+
+	assert.Equal(t, "0B", abi.SectorSize(0).ShortString())
+	assert.Equal(t, "1B", abi.SectorSize(1).ShortString())
+	assert.Equal(t, "1023B", abi.SectorSize(1023).ShortString())
+	assert.Equal(t, "1KiB", abi.SectorSize(kib).ShortString())
+	assert.Equal(t, "1KiB", abi.SectorSize(kib+1).ShortString())   // truncated
+	assert.Equal(t, "1KiB", abi.SectorSize(kib*2-1).ShortString()) // truncated
+	assert.Equal(t, "2KiB", abi.SectorSize(kib*2).ShortString())
+	assert.Equal(t, "2KiB", abi.SectorSize(kib*2+1).ShortString()) // truncated
+	assert.Equal(t, "1023KiB", abi.SectorSize(kib*1023).ShortString())
+	assert.Equal(t, "1MiB", abi.SectorSize(1048576).ShortString())
+	assert.Equal(t, "1GiB", abi.SectorSize(1073741824).ShortString())
+	assert.Equal(t, "1TiB", abi.SectorSize(1099511627776).ShortString())
+	assert.Equal(t, "1PiB", abi.SectorSize(pib).ShortString())
+	assert.Equal(t, "1EiB", abi.SectorSize(pib*kib).ShortString())
+	assert.Equal(t, "10EiB", abi.SectorSize(pib*kib*10).ShortString())
+}
+
+func TestV1_1SealProofEquivalence(t *testing.T) {
+	for v1 := abi.RegisteredSealProof_StackedDrg2KiBV1; v1 < abi.RegisteredSealProof_StackedDrg2KiBV1_1; v1++ {
+		v1Size, err := v1.SectorSize()
+		require.NoError(t, err)
+		v1Wpost, err := v1.RegisteredWindowPoStProof()
+		require.NoError(t, err)
+		v1Gpost, err := v1.RegisteredWinningPoStProof()
+		require.NoError(t, err)
+
+		v1_1 := v1 + 5 // RegisteredSealProof_StackedDrgXxxV1_1
+		v11Size, err := v1_1.SectorSize()
+		require.NoError(t, err)
+		v11Wpost, err := v1_1.RegisteredWindowPoStProof()
+		require.NoError(t, err)
+		v11Gpost, err := v1_1.RegisteredWinningPoStProof()
+		require.NoError(t, err)
+
+		assert.Equal(t, v1Size, v11Size)
+		assert.Equal(t, v1Wpost, v11Wpost)
+		assert.Equal(t, v1Gpost, v11Gpost)
+
+		gpost := abi.RegisteredPoStProof(v1) // RegisteredPoStProof_StackedDrgWinningXxxV1
+		gpostSize, err := gpost.SectorSize()
+		require.NoError(t, err)
+		assert.Equal(t, v1Size, gpostSize)
+
+		wpost := gpost + 5 // RegisteredPoStProof_StackedDrgWindowXxxV1
+		wpostSize, err := wpost.SectorSize()
+		require.NoError(t, err)
+		assert.Equal(t, v1Size, wpostSize)
+	}
+}

extern/go-state-types/big/int.go

+package big
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"math/big"
+
+	cbg "github.com/whyrusleeping/cbor-gen"
+)
+
+// BigIntMaxSerializedLen is the max length of a byte slice representing a CBOR serialized big.
+const BigIntMaxSerializedLen = 128
+
+type Int struct {
+	*big.Int
+}
+
+func NewInt(i int64) Int {
+	return Int{big.NewInt(0).SetInt64(i)}
+}
+
+func NewIntUnsigned(i uint64) Int {
+	return Int{big.NewInt(0).SetUint64(i)}
+}
+
+func NewFromGo(i *big.Int) Int {
+	return Int{big.NewInt(0).Set(i)}
+}
+
+func Zero() Int {
+	return NewInt(0)
+}
+
+// PositiveFromUnsignedBytes interprets b as the bytes of a big-endian unsigned
+// integer and returns a positive Int with this absolute value.
+func PositiveFromUnsignedBytes(b []byte) Int {
+	i := big.NewInt(0).SetBytes(b)
+	return Int{i}
+}
+
+// MustFromString convers dec string into big integer and panics if conversion
+// is not sucessful.
+func MustFromString(s string) Int {
+	v, err := FromString(s)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+func FromString(s string) (Int, error) {
+	v, ok := big.NewInt(0).SetString(s, 10)
+	if !ok {
+		return Int{}, fmt.Errorf("failed to parse string as a big int")
+	}
+
+	return Int{v}, nil
+}
+
+func (bi Int) Copy() Int {
+	return Int{Int: new(big.Int).Set(bi.Int)}
+}
+
+func Product(ints ...Int) Int {
+	p := NewInt(1)
+	for _, i := range ints {
+		p = Mul(p, i)
+	}
+	return p
+}
+
+func Mul(a, b Int) Int {
+	return Int{big.NewInt(0).Mul(a.Int, b.Int)}
+}
+
+func Div(a, b Int) Int {
+	return Int{big.NewInt(0).Div(a.Int, b.Int)}
+}
+
+func Mod(a, b Int) Int {
+	return Int{big.NewInt(0).Mod(a.Int, b.Int)}
+}
+
+func Add(a, b Int) Int {
+	return Int{big.NewInt(0).Add(a.Int, b.Int)}
+}
+
+func Sum(ints ...Int) Int {
+	sum := Zero()
+	for _, i := range ints {
+		sum = Add(sum, i)
+	}
+	return sum
+}
+
+func Subtract(num1 Int, ints ...Int) Int {
+	sub := num1
+	for _, i := range ints {
+		sub = Sub(sub, i)
+	}
+	return sub
+}
+
+func Sub(a, b Int) Int {
+	return Int{big.NewInt(0).Sub(a.Int, b.Int)}
+}
+
+//  Returns a**e unless e <= 0 (in which case returns 1).
+func Exp(a Int, e Int) Int {
+	return Int{big.NewInt(0).Exp(a.Int, e.Int, nil)}
+}
+
+// Returns x << n
+func Lsh(a Int, n uint) Int {
+	return Int{big.NewInt(0).Lsh(a.Int, n)}
+}
+
+// Returns x >> n
+func Rsh(a Int, n uint) Int {
+	return Int{big.NewInt(0).Rsh(a.Int, n)}
+}
+
+func BitLen(a Int) uint {
+	return uint(a.Int.BitLen())
+}
+
+func Max(x, y Int) Int {
+	// taken from max.Max()
+	if x.Equals(Zero()) && x.Equals(y) {
+		if x.Sign() != 0 {
+			return y
+		}
+		return x
+	}
+	if x.GreaterThan(y) {
+		return x
+	}
+	return y
+}
+
+func Min(x, y Int) Int {
+	// taken from max.Min()
+	if x.Equals(Zero()) && x.Equals(y) {
+		if x.Sign() != 0 {
+			return x
+		}
+		return y
+	}
+	if x.LessThan(y) {
+		return x
+	}
+	return y
+}
+
+func Cmp(a, b Int) int {
+	return a.Int.Cmp(b.Int)
+}
+
+// LessThan returns true if bi < o
+func (bi Int) LessThan(o Int) bool {
+	return Cmp(bi, o) < 0
+}
+
+// LessThanEqual returns true if bi <= o
+func (bi Int) LessThanEqual(o Int) bool {
+	return bi.LessThan(o) || bi.Equals(o)
+}
+
+// GreaterThan returns true if bi > o
+func (bi Int) GreaterThan(o Int) bool {
+	return Cmp(bi, o) > 0
+}
+
+// GreaterThanEqual returns true if bi >= o
+func (bi Int) GreaterThanEqual(o Int) bool {
+	return bi.GreaterThan(o) || bi.Equals(o)
+}
+
+// Neg returns the negative of bi.
+func (bi Int) Neg() Int {
+	return Int{big.NewInt(0).Neg(bi.Int)}
+}
+
+// Abs returns the absolute value of bi.
+func (bi Int) Abs() Int {
+	if bi.GreaterThanEqual(Zero()) {
+		return bi.Copy()
+	}
+	return bi.Neg()
+}
+
+// Equals returns true if bi == o
+func (bi Int) Equals(o Int) bool {
+	return Cmp(bi, o) == 0
+}
+
+func (bi *Int) MarshalJSON() ([]byte, error) {
+	if bi.Int == nil {
+		zero := Zero()
+		return json.Marshal(zero)
+	}
+	return json.Marshal(bi.String())
+}
+
+func (bi *Int) UnmarshalJSON(b []byte) error {
+	var s string
+	if err := json.Unmarshal(b, &s); err != nil {
+		return err
+	}
+
+	i, ok := big.NewInt(0).SetString(s, 10)
+	if !ok {
+		return fmt.Errorf("failed to parse big string: '%s'", string(b))
+	}
+
+	bi.Int = i
+	return nil
+}
+
+func (bi *Int) Bytes() ([]byte, error) {
+	if bi.Int == nil {
+		return []byte{}, fmt.Errorf("failed to convert to bytes, big is nil")
+	}
+
+	switch {
+	case bi.Sign() > 0:
+		return append([]byte{0}, bi.Int.Bytes()...), nil
+	case bi.Sign() < 0:
+		return append([]byte{1}, bi.Int.Bytes()...), nil
+	default: //  bi.Sign() == 0:
+		return []byte{}, nil
+	}
+}
+
+func FromBytes(buf []byte) (Int, error) {
+	if len(buf) == 0 {
+		return NewInt(0), nil
+	}
+
+	var negative bool
+	switch buf[0] {
+	case 0:
+		negative = false
+	case 1:
+		negative = true
+	default:
+		return Zero(), fmt.Errorf("big int prefix should be either 0 or 1, got %d", buf[0])
+	}
+
+	i := big.NewInt(0).SetBytes(buf[1:])
+	if negative {
+		i.Neg(i)
+	}
+
+	return Int{i}, nil
+}
+
+func (bi *Int) MarshalBinary() ([]byte, error) {
+	if bi.Int == nil {
+		zero := Zero()
+		return zero.Bytes()
+	}
+	return bi.Bytes()
+}
+
+func (bi *Int) UnmarshalBinary(buf []byte) error {
+	i, err := FromBytes(buf)
+	if err != nil {
+		return err
+	}
+
+	*bi = i
+
+	return nil
+}
+
+func (bi *Int) MarshalCBOR(w io.Writer) error {
+	if bi.Int == nil {
+		zero := Zero()
+		return zero.MarshalCBOR(w)
+	}
+
+	enc, err := bi.Bytes()
+	if err != nil {
+		return err
+	}
+
+	encLen := len(enc)
+	if encLen > BigIntMaxSerializedLen {
+		return fmt.Errorf("big integer byte array too long (%d bytes)", encLen)
+	}
+
+	header := cbg.CborEncodeMajorType(cbg.MajByteString, uint64(encLen))
+	if _, err := w.Write(header); err != nil {
+		return err
+	}
+
+	if _, err := w.Write(enc); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (bi *Int) UnmarshalCBOR(br io.Reader) error {
+	maj, extra, err := cbg.CborReadHeader(br)
+	if err != nil {
+		return err
+	}
+
+	if maj != cbg.MajByteString {
+		return fmt.Errorf("cbor input for fil big int was not a byte string (%x)", maj)
+	}
+
+	if extra == 0 {
+		bi.Int = big.NewInt(0)
+		return nil
+	}
+
+	if extra > BigIntMaxSerializedLen {
+		return fmt.Errorf("big integer byte array too long (%d bytes)", extra)
+	}
+
+	buf := make([]byte, extra)
+	if _, err := io.ReadFull(br, buf); err != nil {
+		return err
+	}
+
+	i, err := FromBytes(buf)
+	if err != nil {
+		return err
+	}
+
+	*bi = i
+
+	return nil
+}
+
+func (bi *Int) IsZero() bool {
+	return bi.Int.Sign() == 0
+}
+
+func (bi *Int) Nil() bool {
+	return bi.Int == nil
+}
+
+func (bi *Int) NilOrZero() bool {
+	return bi.Int == nil || bi.Int.Sign() == 0
+}

extern/go-state-types/big/int_test.go

+package big
+
+import (
+	"bytes"
+	"fmt"
+	"math/big"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	cbg "github.com/whyrusleeping/cbor-gen"
+)
+
+func TestBigIntSerializationRoundTrip(t *testing.T) {
+	testValues := []string{
+		"0", "1", "10", "-10", "9999", "12345678901234567891234567890123456789012345678901234567890",
+	}
+
+	for _, v := range testValues {
+		bi, err := FromString(v)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		buf := new(bytes.Buffer)
+		if err := bi.MarshalCBOR(buf); err != nil {
+			t.Fatal(err)
+		}
+
+		var out Int
+		if err := out.UnmarshalCBOR(buf); err != nil {
+			t.Fatal(err)
+		}
+
+		if Cmp(out, bi) != 0 {
+			t.Fatal("failed to round trip Int through cbor")
+		}
+
+	}
+
+	// nil check
+	bi := Int{}
+	var buf bytes.Buffer
+	err := bi.MarshalCBOR(&buf)
+	require.NoError(t, err)
+
+	assert.Equal(t, "@", buf.String())
+
+}
+
+func TestNewInt(t *testing.T) {
+	a := int64(999)
+	ta := NewInt(a)
+	b := big.NewInt(999)
+	tb := Int{Int: b}
+	tc := NewIntUnsigned(999)
+	assert.True(t, ta.Equals(tb))
+	assert.True(t, ta.Equals(tc))
+	assert.Equal(t, "999", ta.String())
+
+	td := NewFromGo(b)
+	assert.True(t, td.Equals(tb))
+	assert.Equal(t, td.Int, b)
+}
+
+func TestInt_MarshalUnmarshalJSON(t *testing.T) {
+	ta := NewInt(54321)
+	tb := NewInt(0)
+
+	res, err := ta.MarshalJSON()
+	require.NoError(t, err)
+	assert.Equal(t, "\"54321\"", string(res[:]))
+
+	require.NoError(t, tb.UnmarshalJSON(res))
+	assert.Equal(t, ta, tb)
+
+	assert.EqualError(t, tb.UnmarshalJSON([]byte("123garbage"[:])), "invalid character 'g' after top-level value")
+
+	tnil := Int{}
+	s, err := tnil.MarshalJSON()
+	require.NoError(t, err)
+	assert.Equal(t, "\"0\"", string(s))
+}
+
+func TestOperations(t *testing.T) {
+	testCases := []struct {
+		name     string
+		f        func(Int, Int) Int
+		expected Int
+	}{
+		{name: "Sum", f: Add, expected: NewInt(7000)},
+		{name: "Sub", f: Sub, expected: NewInt(3000)},
+		{name: "Mul", f: Mul, expected: NewInt(10000000)},
+		{name: "Div", f: Div, expected: NewInt(2)},
+		{name: "Mod", f: Mod, expected: NewInt(1000)},
+	}
+	for _, testCase := range testCases {
+		t.Run(testCase.name, func(t *testing.T) {
+			ta := Int{Int: big.NewInt(5000)}
+			tb := Int{Int: big.NewInt(2000)}
+			assert.Equal(t, testCase.expected, testCase.f(ta, tb))
+		})
+	}
+
+	ta := NewInt(5000)
+	tb := NewInt(2000)
+	tc := NewInt(2000)
+	assert.Equal(t, Cmp(ta, tb), 1)
+	assert.Equal(t, Cmp(tb, ta), -1)
+	assert.Equal(t, Cmp(tb, tc), 0)
+	assert.True(t, ta.GreaterThan(tb))
+	assert.False(t, ta.LessThan(tb))
+	assert.True(t, tb.Equals(tc))
+
+	ta = Int{}
+	assert.True(t, ta.Nil())
+}
+
+func TestCopy(t *testing.T) {
+	b1 := NewInt(1)
+	b2 := b1.Copy()
+	require.EqualValues(t, b1, b2)
+
+	require.EqualValues(t, Zero(), Zero().Copy())
+}
+
+func TestSum(t *testing.T) {
+	b1 := NewInt(1)
+	b2 := NewInt(2)
+	b3 := NewInt(3)
+	b4 := NewInt(4)
+
+	require.EqualValues(t, NewInt(10), Sum(b1, b2, b3, b4))
+
+	require.EqualValues(t, NewInt(20), Sum(NewInt(20)))
+}
+
+func TestProduct(t *testing.T) {
+	b1 := NewInt(1)
+	b2 := NewInt(2)
+	b3 := NewInt(3)
+	b4 := NewInt(4)
+
+	require.EqualValues(t, NewInt(24), Product(b1, b2, b3, b4))
+
+	require.EqualValues(t, NewInt(20), Product(NewInt(20)))
+}
+
+func TestSubtract(t *testing.T) {
+	b1 := NewInt(100)
+	b2 := NewInt(20)
+	b3 := NewInt(10)
+	b4 := NewInt(5)
+
+	require.EqualValues(t, NewInt(65), Subtract(b1, b2, b3, b4))
+
+	require.EqualValues(t, NewInt(20), Subtract(NewInt(20)))
+}
+
+func TestInt_Format(t *testing.T) {
+	ta := NewInt(33333000000)
+
+	s := fmt.Sprintf("%s", ta) // nolint: gosimple
+	assert.Equal(t, "33333000000", s)
+
+	s1 := fmt.Sprintf("%v", ta) // nolint: gosimple
+	assert.Equal(t, "33333000000", s1)
+
+	s2 := fmt.Sprintf("%-15d", ta) // nolint: gosimple
+	assert.Equal(t, "33333000000    ", s2)
+}
+
+func TestPositveFromUnsignedBytes(t *testing.T) {
+	res := PositiveFromUnsignedBytes([]byte("garbage"[:]))
+	// garbage in, garbage out
+	expected := Int{Int: big.NewInt(29099066505914213)}
+	assert.Equal(t, expected, res)
+
+	expected2 := Int{Int: big.NewInt(12345)}
+	expectedRes := expected2.Int.Bytes()
+	res = PositiveFromUnsignedBytes(expectedRes)
+	assert.Equal(t, expected2, res)
+	assert.Equal(t, 1, res.Sign()) // positive
+}
+
+func TestFromString(t *testing.T) {
+	_, err := FromString("garbage")
+	assert.EqualError(t, err, "failed to parse string as a big int")
+
+	res, err := FromString("12345")
+	require.NoError(t, err)
+	expected := Int{Int: big.NewInt(12345)}
+	assert.Equal(t, expected, res)
+}
+
+func TestCBOR(t *testing.T) {
+	t.Run("happy", func(t *testing.T) {
+		ints := []Int{
+			NewInt(0),
+			NewInt(-1),
+			NewInt(1),
+			NewInt(1e18),
+			Lsh(NewInt(1), 80),
+		}
+		for _, n := range ints {
+			var b bytes.Buffer
+			assert.NoError(t, n.MarshalCBOR(&b))
+			var out Int
+			assert.NoError(t, out.UnmarshalCBOR(&b))
+			assert.Equal(t, n, out)
+		}
+	})
+
+	t.Run("fails to marshal too large", func(t *testing.T) {
+		giant := Lsh(NewInt(1), 8*(BigIntMaxSerializedLen-1))
+		var b bytes.Buffer
+		assert.Error(t, giant.MarshalCBOR(&b))
+	})
+
+	t.Run("fails to unmarshal too large", func(t *testing.T) {
+		// Construct CBOR for a too-large byte array
+		var b bytes.Buffer
+		header := cbg.CborEncodeMajorType(cbg.MajByteString, uint64(BigIntMaxSerializedLen+1))
+		_, err := b.Write(header)
+		require.NoError(t, err)
+		_, err = b.Write(make([]byte, BigIntMaxSerializedLen+1))
+		require.NoError(t, err)
+
+		var out Int
+		assert.Error(t, out.UnmarshalCBOR(&b))
+	})
+}

extern/go-state-types/cbor/cbor.go

+package cbor
+
+import "io"
+
+// These interfaces are intended to match those from whyrusleeping/cbor-gen, such that code generated from that
+// system is automatically usable here (but not mandatory).
+type Marshaler interface {
+	MarshalCBOR(w io.Writer) error
+}
+
+type Unmarshaler interface {
+	UnmarshalCBOR(r io.Reader) error
+}
+
+type Er interface {
+	Marshaler
+	Unmarshaler
+}

extern/go-state-types/crypto/randomness.go

+package crypto
+
+// Specifies a domain for randomness generation.
+type DomainSeparationTag int64
+
+const (
+	DomainSeparationTag_TicketProduction DomainSeparationTag = 1 + iota
+	DomainSeparationTag_ElectionProofProduction
+	DomainSeparationTag_WinningPoStChallengeSeed
+	DomainSeparationTag_WindowedPoStChallengeSeed
+	DomainSeparationTag_SealRandomness
+	DomainSeparationTag_InteractiveSealChallengeSeed
+	DomainSeparationTag_WindowedPoStDeadlineAssignment
+	DomainSeparationTag_MarketDealCronSeed
+	DomainSeparationTag_PoStChainCommit
+)

extern/go-state-types/crypto/signature.go

+package crypto
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"math"
+
+	cbg "github.com/whyrusleeping/cbor-gen"
+)
+
+type SigType byte
+
+const (
+	SigTypeUnknown = SigType(math.MaxUint8)
+
+	SigTypeSecp256k1 = SigType(iota)
+	SigTypeBLS
+)
+
+func (t SigType) Name() (string, error) {
+	switch t {
+	case SigTypeUnknown:
+		return "unknown", nil
+	case SigTypeSecp256k1:
+		return "secp256k1", nil
+	case SigTypeBLS:
+		return "bls", nil
+	default:
+		return "", fmt.Errorf("invalid signature type: %d", t)
+	}
+}
+
+const SignatureMaxLength = 200
+
+type Signature struct {
+	Type SigType
+	Data []byte
+}
+
+func (s *Signature) Equals(o *Signature) bool {
+	if s == nil || o == nil {
+		return s == o
+	}
+	return s.Type == o.Type && bytes.Equal(s.Data, o.Data)
+}
+
+func (s *Signature) MarshalCBOR(w io.Writer) error {
+	if s == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
+
+	header := cbg.CborEncodeMajorType(cbg.MajByteString, uint64(len(s.Data)+1))
+	if _, err := w.Write(header); err != nil {
+		return err
+	}
+	if _, err := w.Write([]byte{byte(s.Type)}); err != nil {
+		return err
+	}
+	if _, err := w.Write(s.Data); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (s *Signature) UnmarshalCBOR(br io.Reader) error {
+	maj, l, err := cbg.CborReadHeader(br)
+	if err != nil {
+		return err
+	}
+
+	if maj != cbg.MajByteString {
+		return fmt.Errorf("not a byte string")
+	}
+	if l > SignatureMaxLength {
+		return fmt.Errorf("string too long")
+	}
+	if l == 0 {
+		return fmt.Errorf("string empty")
+	}
+	buf := make([]byte, l)
+	if _, err = io.ReadFull(br, buf); err != nil {
+		return err
+	}
+	switch SigType(buf[0]) {
+	default:
+		return fmt.Errorf("invalid signature type in cbor input: %d", buf[0])
+	case SigTypeSecp256k1:
+		s.Type = SigTypeSecp256k1
+	case SigTypeBLS:
+		s.Type = SigTypeBLS
+	}
+	s.Data = buf[1:]
+	return nil
+}
+
+func (s *Signature) MarshalBinary() ([]byte, error) {
+	bs := make([]byte, len(s.Data)+1)
+	bs[0] = byte(s.Type)
+	copy(bs[1:], s.Data)
+	return bs, nil
+}
+
+func (s *Signature) UnmarshalBinary(bs []byte) error {
+	if len(bs) > SignatureMaxLength {
+		return fmt.Errorf("invalid signature bytes, too long (%d)", len(bs))
+	}
+	if len(bs) == 0 {
+		return fmt.Errorf("invalid signature bytes of length 0")
+	}
+	switch SigType(bs[0]) {
+	default:
+		// Do not error during unmarshal but leave a standard value.
+		// unmarshal(marshal(zero valued sig)) is valuable for test
+		// and type needs to be checked by caller anyway.
+		s.Type = SigTypeUnknown
+	case SigTypeSecp256k1:
+		s.Type = SigTypeSecp256k1
+	case SigTypeBLS:
+		s.Type = SigTypeBLS
+	}
+	s.Data = bs[1:]
+	return nil
+}

extern/go-state-types/crypto/signature_test.go

+package crypto_test
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	cbg "github.com/whyrusleeping/cbor-gen"
+
+	"github.com/filecoin-project/go-state-types/crypto"
+)
+
+func TestEquality(t *testing.T) {
+	a := crypto.Signature{
+		Type: crypto.SigTypeSecp256k1,
+		Data: []byte{1, 2, 3, 4},
+	}
+
+	assert.True(t, a.Equals(&a))
+	assert.False(t, a.Equals(&crypto.Signature{
+		Type: crypto.SigTypeBLS,
+		Data: a.Data,
+	}))
+	assert.False(t, a.Equals(&crypto.Signature{
+		Type: a.Type,
+		Data: []byte{1, 1, 1, 1},
+	}))
+}
+
+func TestCBOR(t *testing.T) {
+	a := crypto.Signature{
+		Type: crypto.SigTypeSecp256k1,
+		Data: []byte{1, 2, 3, 4},
+	}
+	b := crypto.Signature{
+		Type: crypto.SigTypeBLS,
+		Data: []byte{5, 6, 7, 8},
+	}
+
+	t.Run("round trip secp", func(t *testing.T) {
+		var buf bytes.Buffer
+		var out crypto.Signature
+		require.NoError(t, a.MarshalCBOR(&buf))
+		require.NoError(t, out.UnmarshalCBOR(&buf))
+		require.True(t, out.Equals(&a))
+	})
+	t.Run("round trip bls", func(t *testing.T) {
+		var buf bytes.Buffer
+		var out crypto.Signature
+		require.NoError(t, b.MarshalCBOR(&buf))
+		require.NoError(t, out.UnmarshalCBOR(&buf))
+		require.True(t, out.Equals(&b))
+	})
+
+	t.Run("require byte string", func(t *testing.T) {
+		var buf bytes.Buffer
+		var out crypto.Signature
+		require.NoError(t, cbg.CborWriteHeader(&buf, cbg.MajArray, 10))
+		assert.EqualError(t, out.UnmarshalCBOR(&buf), "not a byte string")
+	})
+	t.Run("require max length", func(t *testing.T) {
+		var buf bytes.Buffer
+		var out crypto.Signature
+		require.NoError(t, cbg.CborWriteHeader(&buf, cbg.MajByteString, crypto.SignatureMaxLength+1))
+		assert.EqualError(t, out.UnmarshalCBOR(&buf), "string too long")
+	})
+	t.Run("require non-empty", func(t *testing.T) {
+		var buf bytes.Buffer
+		var out crypto.Signature
+		require.NoError(t, cbg.CborWriteHeader(&buf, cbg.MajByteString, 0))
+		assert.EqualError(t, out.UnmarshalCBOR(&buf), "string empty")
+	})
+	t.Run("require correct length", func(t *testing.T) {
+		var buf bytes.Buffer
+		var out crypto.Signature
+		require.NoError(t, cbg.CborWriteHeader(&buf, cbg.MajByteString, 10))
+		buf.WriteString("7 bytes")
+		assert.EqualError(t, out.UnmarshalCBOR(&buf), "unexpected EOF")
+	})
+	t.Run("require valid type", func(t *testing.T) {
+		var buf bytes.Buffer
+		var out crypto.Signature
+		require.NoError(t, cbg.CborWriteHeader(&buf, cbg.MajByteString, 4))
+		buf.Write([]byte{byte(crypto.SigTypeUnknown)})
+		buf.WriteString("sig")
+		assert.EqualError(t, out.UnmarshalCBOR(&buf), "invalid signature type in cbor input: 255")
+	})
+	t.Run("happy decode", func(t *testing.T) {
+		var buf bytes.Buffer
+		var out crypto.Signature
+		require.NoError(t, cbg.CborWriteHeader(&buf, cbg.MajByteString, 4))
+		buf.Write([]byte{byte(crypto.SigTypeSecp256k1)})
+		buf.WriteString("sig")
+		assert.NoError(t, out.UnmarshalCBOR(&buf))
+	})
+}

extern/go-state-types/dline/deadline.go

+package dline
+
+import "github.com/filecoin-project/go-state-types/abi"
+
+// Deadline calculations with respect to a current epoch.
+// "Deadline" refers to the window during which proofs may be submitted.
+// Windows are non-overlapping ranges [Open, Close), but the challenge epoch for a window occurs before
+// the window opens.
+// The current epoch may not necessarily lie within the deadline or proving period represented here.
+type Info struct {
+	// Deadline parameters
+	CurrentEpoch abi.ChainEpoch // Epoch at which this info was calculated.
+	PeriodStart  abi.ChainEpoch // First epoch of the proving period (<= CurrentEpoch).
+	Index        uint64         // A deadline index, in [0..d.WPoStProvingPeriodDeadlines) unless period elapsed.
+	Open         abi.ChainEpoch // First epoch from which a proof may be submitted (>= CurrentEpoch).
+	Close        abi.ChainEpoch // First epoch from which a proof may no longer be submitted (>= Open).
+	Challenge    abi.ChainEpoch // Epoch at which to sample the chain for challenge (< Open).
+	FaultCutoff  abi.ChainEpoch // First epoch at which a fault declaration is rejected (< Open).
+
+	// Protocol parameters
+	WPoStPeriodDeadlines   uint64
+	WPoStProvingPeriod     abi.ChainEpoch // the number of epochs in a window post proving period
+	WPoStChallengeWindow   abi.ChainEpoch
+	WPoStChallengeLookback abi.ChainEpoch
+	FaultDeclarationCutoff abi.ChainEpoch
+}
+
+// Whether the proving period has begun.
+func (d *Info) PeriodStarted() bool {
+	return d.CurrentEpoch >= d.PeriodStart
+}
+
+// Whether the proving period has elapsed.
+func (d *Info) PeriodElapsed() bool {
+	return d.CurrentEpoch >= d.NextPeriodStart()
+}
+
+// The last epoch in the proving period.
+func (d *Info) PeriodEnd() abi.ChainEpoch {
+	return d.PeriodStart + d.WPoStProvingPeriod - 1
+}
+
+// The first epoch in the next proving period.
+func (d *Info) NextPeriodStart() abi.ChainEpoch {
+	return d.PeriodStart + d.WPoStProvingPeriod
+}
+
+// Whether the current deadline is currently open.
+func (d *Info) IsOpen() bool {
+	return d.CurrentEpoch >= d.Open && d.CurrentEpoch < d.Close
+}
+
+// Whether the current deadline has already closed.
+func (d *Info) HasElapsed() bool {
+	return d.CurrentEpoch >= d.Close
+}
+
+// The last epoch during which a proof may be submitted.
+func (d *Info) Last() abi.ChainEpoch {
+	return d.Close - 1
+}
+
+// Epoch at which the subsequent deadline opens.
+func (d *Info) NextOpen() abi.ChainEpoch {
+	return d.Close
+}
+
+// Whether the deadline's fault cutoff has passed.
+func (d *Info) FaultCutoffPassed() bool {
+	return d.CurrentEpoch >= d.FaultCutoff
+}
+
+// Returns the next instance of this deadline that has not yet elapsed.
+func (d *Info) NextNotElapsed() *Info {
+	// If the deadline hasn't elapsed, do nothing.
+	if !d.HasElapsed() {
+		return d
+	}
+
+	// find a nearby period start
+	// 1. first, find our period's offset from the "global" period
+	offset := d.PeriodStart % d.WPoStProvingPeriod
+	// handle negative period starts just in case.
+	if offset < 0 {
+		offset += d.WPoStProvingPeriod
+	}
+	// 2. determine the global period index.
+	globalPeriod := (d.CurrentEpoch / d.WPoStProvingPeriod)
+	// 3. Determine our next period start.
+	periodStart := globalPeriod*d.WPoStProvingPeriod + offset
+
+	// Backtrack so the period starts before the current epoch. This should usually run 0 or 1 times.
+	for periodStart > d.CurrentEpoch {
+		periodStart -= d.WPoStProvingPeriod
+	}
+
+	// If the next deadline opens at or after the current epoch, move to the next pp.
+	if d.CurrentEpoch >= periodStart+abi.ChainEpoch(d.Index+1)*d.WPoStChallengeWindow {
+		periodStart += d.WPoStProvingPeriod
+	}
+
+	return NewInfo(periodStart, d.Index, d.CurrentEpoch, d.WPoStPeriodDeadlines, d.WPoStProvingPeriod, d.WPoStChallengeWindow, d.WPoStChallengeLookback, d.FaultDeclarationCutoff)
+}
+
+// Returns deadline-related calculations for a deadline in some proving period and the current epoch.
+func NewInfo(periodStart abi.ChainEpoch, deadlineIdx uint64, currEpoch abi.ChainEpoch, wPoStPeriodDeadlines uint64, wPoStProvingPeriod, wPoStChallengeWindow, wPoStChallengeLookback, faultDeclarationCutoff abi.ChainEpoch) *Info {
+	if deadlineIdx < wPoStPeriodDeadlines {
+		deadlineOpen := periodStart + (abi.ChainEpoch(deadlineIdx) * wPoStChallengeWindow)
+		return &Info{
+			CurrentEpoch: currEpoch,
+			PeriodStart:  periodStart,
+			Index:        deadlineIdx,
+			Open:         deadlineOpen,
+			Close:        deadlineOpen + wPoStChallengeWindow,
+			Challenge:    deadlineOpen - wPoStChallengeLookback,
+			FaultCutoff:  deadlineOpen - faultDeclarationCutoff,
+			// parameters
+			WPoStPeriodDeadlines:   wPoStPeriodDeadlines,
+			WPoStProvingPeriod:     wPoStProvingPeriod,
+			WPoStChallengeWindow:   wPoStChallengeWindow,
+			WPoStChallengeLookback: wPoStChallengeLookback,
+			FaultDeclarationCutoff: faultDeclarationCutoff,
+		}
+	} else {
+		// Return deadline info for a no-duration deadline immediately after the last real one.
+		afterLastDeadline := periodStart + wPoStProvingPeriod
+		return &Info{
+			CurrentEpoch: currEpoch,
+			PeriodStart:  periodStart,
+			Index:        deadlineIdx,
+			Open:         afterLastDeadline,
+			Close:        afterLastDeadline,
+			Challenge:    afterLastDeadline,
+			FaultCutoff:  0,
+			// parameters
+			WPoStPeriodDeadlines:   wPoStPeriodDeadlines,
+			WPoStProvingPeriod:     wPoStProvingPeriod,
+			WPoStChallengeWindow:   wPoStChallengeWindow,
+			WPoStChallengeLookback: wPoStChallengeLookback,
+			FaultDeclarationCutoff: faultDeclarationCutoff,
+		}
+	}
+}

extern/go-state-types/dline/deadline_test.go

+package dline_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/filecoin-project/go-state-types/abi"
+	"github.com/filecoin-project/go-state-types/dline"
+)
+
+func TestProvingPeriodDeadlines(t *testing.T) {
+	DLs := uint64(48)          // miner.WPoStPeriodDeadlines
+	PP := abi.ChainEpoch(2880) // miner.WPoStProvingPeriod
+	CW := abi.ChainEpoch(60)   // miner.WPoStChallengeWindow
+	CL := abi.ChainEpoch(20)   // miner.WPoStChallengeLookback
+	FDC := abi.ChainEpoch(70)  // miner.FaultDeclarationCutoff
+
+	t.Run("pre-open", func(t *testing.T) {
+		curr := abi.ChainEpoch(0) // Current is before the period opens.
+		{
+			periodStart := FDC + 1
+			di := dline.NewInfo(periodStart, 0, curr, DLs, PP, CW, CL, FDC)
+			assert.Equal(t, curr, di.CurrentEpoch)
+			assert.Equal(t, periodStart, di.PeriodStart)
+			assert.Equal(t, uint64(0), di.Index)
+			assert.Equal(t, periodStart, di.Open)
+			assert.Equal(t, periodStart+CW, di.Close)
+			assert.Equal(t, periodStart-CL, di.Challenge)
+			assert.Equal(t, periodStart-FDC, di.FaultCutoff)
+
+			assert.False(t, di.PeriodStarted())
+			assert.False(t, di.PeriodElapsed())
+			assert.False(t, di.IsOpen())
+			assert.False(t, di.HasElapsed())
+			assert.Equal(t, periodStart+CW-1, di.Last())
+			assert.Equal(t, periodStart+CW, di.NextOpen())
+			assert.False(t, di.FaultCutoffPassed())
+			assert.Equal(t, periodStart+PP-1, di.PeriodEnd())
+			assert.Equal(t, periodStart+PP, di.NextPeriodStart())
+		}
+		{
+			periodStart := FDC - 1
+			di := dline.NewInfo(periodStart, 0, curr, DLs, PP, CW, CL, FDC)
+			assert.True(t, di.FaultCutoffPassed())
+		}
+	})
+
+	t.Run("proving period boundary", func(t *testing.T) {
+		periodStart := abi.ChainEpoch(50000)
+		{
+			// Period not yet started
+			curr := periodStart - 1
+			di := dline.NewInfo(periodStart, 0, curr, DLs, PP, CW, CL, FDC)
+			assert.False(t, di.PeriodStarted()) // Not yet started
+			assert.False(t, di.PeriodElapsed())
+			assert.Equal(t, periodStart+PP-1, di.PeriodEnd())
+			assert.Equal(t, periodStart+PP, di.NextPeriodStart())
+		}
+		{
+			// Period started
+			curr := periodStart
+			di := dline.NewInfo(periodStart, 0, curr, DLs, PP, CW, CL, FDC)
+			assert.True(t, di.PeriodStarted())
+			assert.False(t, di.PeriodElapsed())
+			assert.Equal(t, periodStart+PP-1, di.PeriodEnd())
+			assert.Equal(t, periodStart+PP, di.NextPeriodStart())
+		}
+		{
+			// Period elapsed
+			curr := periodStart + PP
+			di := dline.NewInfo(periodStart, DLs-1, curr, DLs, PP, CW, CL, FDC)
+			assert.True(t, di.PeriodStarted())
+			assert.True(t, di.PeriodElapsed())
+			assert.Equal(t, periodStart+PP-1, di.PeriodEnd())
+			assert.Equal(t, periodStart+PP, di.NextPeriodStart())
+
+			assert.False(t, di.IsOpen())
+			assert.True(t, di.HasElapsed())
+		}
+	})
+
+	t.Run("deadline boundaries", func(t *testing.T) {
+		periodStart := abi.ChainEpoch(50000)
+		{
+			// First epoch of deadline zero
+			curr := periodStart
+			di := dline.NewInfo(periodStart, 0, curr, DLs, PP, CW, CL, FDC)
+
+			assert.Equal(t, periodStart, di.Open)
+			assert.Equal(t, periodStart+CW, di.Close)
+			assert.Equal(t, periodStart-CL, di.Challenge)
+			assert.Equal(t, periodStart-FDC, di.FaultCutoff)
+
+			assert.True(t, di.IsOpen())
+			assert.False(t, di.HasElapsed())
+			assert.Equal(t, periodStart+CW-1, di.Last())
+			assert.Equal(t, periodStart+CW, di.NextOpen())
+			assert.True(t, di.FaultCutoffPassed())
+
+			// The last invalid epoch of a deadline is the first valid epoch for the next.
+			assert.Equal(t, di.Last()+1, di.NextOpen())
+			assert.Equal(t, di.Close, di.NextOpen())
+		}
+		{
+			// Before deadline zero opens
+			curr := periodStart - 1
+			di := dline.NewInfo(periodStart, 0, curr, DLs, PP, CW, CL, FDC)
+
+			assert.False(t, di.IsOpen()) // Not yet open
+			assert.False(t, di.HasElapsed())
+			assert.True(t, di.FaultCutoffPassed())
+
+			// The next not-elapsed is this one, because it hasn't even started yet.
+			nxt := di.NextNotElapsed()
+			assert.Equal(t, periodStart, nxt.PeriodStart)
+			assert.Equal(t, uint64(0), nxt.Index)
+		}
+		{
+			// During deadline zero, deadline one isn't open
+			curr := periodStart
+			di0 := dline.NewInfo(periodStart, 0, curr, DLs, PP, CW, CL, FDC)
+			assert.True(t, di0.IsOpen()) // Now open
+			assert.False(t, di0.HasElapsed())
+			assert.True(t, di0.FaultCutoffPassed())
+
+			// The next not-elapsed is this one, which is not yet
+			// open, but not elapsed either.
+			nxt0 := di0.NextNotElapsed()
+			assert.Equal(t, periodStart, nxt0.PeriodStart)
+			assert.Equal(t, uint64(0), nxt0.Index)
+
+			di1 := dline.NewInfo(periodStart, 1, curr, DLs, PP, CW, CL, FDC)
+			assert.False(t, di1.IsOpen())
+			assert.False(t, di1.HasElapsed())
+			// The fault cutoff is more than one deadline into the future.
+			assert.True(t, di1.FaultCutoffPassed())
+
+			// The next not-elapsed is the upcoming one
+			nxt1 := di1.NextNotElapsed()
+			assert.Equal(t, periodStart, nxt1.PeriodStart)
+			assert.Equal(t, uint64(1), nxt1.Index)
+		}
+		{
+			// Last epoch of deadline zero
+			curr := periodStart + CW - 1
+			di := dline.NewInfo(periodStart, 0, curr, DLs, PP, CW, CL, FDC)
+
+			assert.True(t, di.IsOpen())
+			assert.False(t, di.HasElapsed())
+			assert.True(t, di.FaultCutoffPassed())
+
+			// The next not-elapsed is this one still
+			nxt := di.NextNotElapsed()
+			assert.Equal(t, periodStart, nxt.PeriodStart)
+			assert.Equal(t, uint64(0), nxt.Index)
+		}
+		{
+			// Deadline zero expired
+			curr := periodStart + CW
+			di := dline.NewInfo(periodStart, 0, curr, DLs, PP, CW, CL, FDC)
+
+			assert.False(t, di.IsOpen())
+			assert.True(t, di.HasElapsed())
+			assert.True(t, di.FaultCutoffPassed())
+
+			// The next not-elapsed is the subsequent proving period
+			nxt := di.NextNotElapsed()
+			assert.Equal(t, periodStart+PP, nxt.PeriodStart)
+			assert.Equal(t, uint64(0), nxt.Index)
+		}
+	})
+
+	t.Run("period expired", func(t *testing.T) {
+		periodStart := abi.ChainEpoch(0)
+		curr := periodStart + PP
+		d := dline.NewInfo(periodStart, DLs, curr, DLs, PP, CW, CL, FDC)
+		assert.True(t, d.PeriodStarted())
+		assert.True(t, d.PeriodElapsed())
+		assert.Equal(t, DLs, d.Index)
+		assert.False(t, d.IsOpen())
+		assert.True(t, d.HasElapsed())
+		assert.True(t, d.FaultCutoffPassed())
+		assert.Equal(t, PP-1, d.PeriodEnd())
+		assert.Equal(t, PP, d.NextPeriodStart())
+	})
+
+	t.Run("period start", func(t *testing.T) {
+		periodStart := abi.ChainEpoch(0)
+		f := func(t *testing.T) {
+			for curr := -99999; curr < 99999; curr++ {
+				d := dline.NewInfo(periodStart, DLs, abi.ChainEpoch(curr), DLs, PP, CW, CL, FDC)
+				actual := d.NextNotElapsed()
+				expected := d
+				for expected.HasElapsed() {
+					expected = dline.NewInfo(expected.PeriodStart+PP, DLs, abi.ChainEpoch(curr), DLs, PP, CW, CL, FDC)
+				}
+				assert.Equal(t, *expected, *actual)
+			}
+		}
+
+		periodStart = 60
+		t.Run("small", f)
+		periodStart = PP + 60
+		t.Run("next", f)
+		periodStart = 5*PP + 60
+		t.Run("later", f)
+		periodStart = 60 - PP
+		t.Run("negative", f)
+	})
+}

extern/go-state-types/exitcode/common.go

+package exitcode
+
+// Common error codes that may be shared by different actors.
+// Actors may also define their own codes, including redefining these values.
+
+const (
+	// Indicates a method parameter is invalid.
+	ErrIllegalArgument = FirstActorErrorCode + iota
+	// Indicates a requested resource does not exist.
+	ErrNotFound
+	// Indicates an action is disallowed.
+	ErrForbidden
+	// Indicates a balance of funds is insufficient.
+	ErrInsufficientFunds
+	// Indicates an actor's internal state is invalid.
+	ErrIllegalState
+	// Indicates de/serialization failure within actor code.
+	ErrSerialization
+
+	// Common error codes stop here.  If you define a common error code above
+	// this value it will have conflicting interpretations
+	FirstActorSpecificExitCode = ExitCode(32)
+)

extern/go-state-types/exitcode/exitcode.go

+package exitcode
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+
+	"golang.org/x/xerrors"
+)
+
+type ExitCode int64
+
+func (x ExitCode) IsSuccess() bool {
+	return x == Ok
+}
+
+func (x ExitCode) IsError() bool {
+	return !x.IsSuccess()
+}
+
+// Whether an exit code indicates a message send failure.
+// A send failure means that the caller's CallSeqNum is not incremented and the caller has not paid
+// gas fees for the message (because the caller doesn't exist or can't afford it).
+// A receipt with send failure does not indicate that the message (or another one carrying the same CallSeqNum)
+// could not apply in the future, against a different state.
+func (x ExitCode) IsSendFailure() bool {
+	return x == SysErrSenderInvalid || x == SysErrSenderStateInvalid
+}
+
+// A non-canonical string representation for human inspection.
+func (x ExitCode) String() string {
+	name, ok := names[x]
+	if ok {
+		return fmt.Sprintf("%s(%d)", name, x)
+	}
+	return strconv.FormatInt(int64(x), 10)
+}
+
+// Implement error to trigger Go compiler checking of exit code return values.
+func (x ExitCode) Error() string {
+	return x.String()
+}
+
+// Wrapf attaches an error message, and possibly an error, to the exit
+// code.
+//
+//    err := ErrIllegalArgument.Wrapf("my description: %w", err)
+//    exitcode.Unwrap(exitcode.ErrIllegalState, err) == exitcode.ErrIllegalArgument
+func (x ExitCode) Wrapf(msg string, args ...interface{}) error {
+	return &wrapped{
+		exitCode: x,
+		cause:    xerrors.Errorf(msg, args...),
+	}
+}
+
+type wrapped struct {
+	exitCode ExitCode
+	cause    error
+}
+
+func (w *wrapped) String() string {
+	return w.Error()
+}
+
+func (w *wrapped) Error() string {
+	// Don't include the exit code. That will be handled by the runtime and
+	// this error has likely been wrapped multiple times.
+	return w.cause.Error()
+}
+
+// implements the interface required by errors.As
+func (w *wrapped) As(target interface{}) bool {
+	return errors.As(w.exitCode, target) || errors.As(w.cause, target)
+}
+
+// implements the interface required by errors.Is
+func (w *wrapped) Is(target error) bool {
+	if _, ok := target.(ExitCode); ok {
+		// If the target is an exit code, make sure we shadow lower exit
+		// codes.
+		return w.exitCode == target
+	}
+	return errors.Is(w.cause, target)
+}
+
+// Unwrap extracts an exit code from an error, defaulting to the passed default
+// exit code.
+//
+//    err := ErrIllegalState.WithContext("my description: %w", err)
+//    exitcode.Unwrap(exitcode.ErrIllegalState, err) == exitcode.ErrIllegalArgument
+func Unwrap(err error, defaultExitCode ExitCode) (code ExitCode) {
+	if errors.As(err, &code) {
+		return code
+	}
+	return defaultExitCode
+}

extern/go-state-types/exitcode/exitcode_test.go

+package exitcode_test
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"golang.org/x/xerrors"
+
+	"github.com/filecoin-project/go-state-types/exitcode"
+)
+
+func TestWithContext(t *testing.T) {
+	baseErr := errors.New("base error")
+	codedErr := exitcode.ErrForbidden.Wrapf("coded: %w", baseErr)
+	wrappedErr := xerrors.Errorf("wrapper: %w", codedErr)
+	shadowedErr := exitcode.ErrIllegalState.Wrapf("shadow: %w", codedErr)
+
+	// Test default.
+	assert.Equal(t, exitcode.Ok, exitcode.Unwrap(baseErr, exitcode.Ok))
+	assert.Equal(t, exitcode.ErrIllegalState, exitcode.Unwrap(baseErr, exitcode.ErrIllegalState))
+	assert.True(t, errors.Is(baseErr, baseErr))
+
+	// Test coded.
+	assert.Equal(t, exitcode.ErrForbidden, exitcode.Unwrap(codedErr, exitcode.Ok))
+	assert.True(t, errors.Is(wrappedErr, codedErr))
+	assert.False(t, errors.Is(codedErr, wrappedErr))
+	assert.False(t, errors.Is(wrappedErr, exitcode.Ok))
+
+	// Test wrapped
+	assert.Equal(t, exitcode.ErrForbidden, exitcode.Unwrap(wrappedErr, exitcode.Ok))
+	assert.True(t, errors.Is(wrappedErr, codedErr))
+	assert.True(t, errors.Is(wrappedErr, wrappedErr))
+	assert.False(t, errors.Is(wrappedErr, exitcode.Ok))
+
+	// Test shadowed
+	assert.Equal(t, exitcode.ErrIllegalState, exitcode.Unwrap(shadowedErr, exitcode.Ok))
+	assert.True(t, errors.Is(shadowedErr, exitcode.ErrIllegalState))
+	assert.False(t, errors.Is(shadowedErr, exitcode.ErrForbidden))
+}

extern/go-state-types/exitcode/reserved.go

+package exitcode
+
+// The system error codes are reserved for use by the runtime.
+// No actor may use one explicitly. Correspondingly, no runtime invocation should abort with an exit
+// code outside this list.
+// We could move these definitions out of this package and into the runtime spec.
+const (
+	Ok = ExitCode(0)
+
+	// Indicates that the actor identified as the sender of a message is not valid as a message sender:
+	// - not present in the state tree
+	// - not an account actor (for top-level messages)
+	// - code CID is not found or invalid
+	// (not found in the state tree, not an account, has no code).
+	SysErrSenderInvalid = ExitCode(1)
+
+	// Indicates that the sender of a message is not in a state to send the message:
+	// - invocation out of sequence (mismatched CallSeqNum)
+	// - insufficient funds to cover execution
+	SysErrSenderStateInvalid = ExitCode(2)
+
+	// Indicates failure to find a method in an actor.
+	SysErrInvalidMethod = ExitCode(3)
+
+	// Unused.
+	SysErrReserved1 = ExitCode(4)
+
+	// Indicates that the receiver of a message is not valid (and cannot be implicitly created).
+	SysErrInvalidReceiver = ExitCode(5)
+
+	// Indicates that a message sender has insufficient balance for the value being sent.
+	// Note that this is distinct from SysErrSenderStateInvalid when a top-level sender can't cover
+	// value transfer + gas. This code is only expected to come from inter-actor sends.
+	SysErrInsufficientFunds = ExitCode(6)
+
+	// Indicates message execution (including subcalls) used more gas than the specified limit.
+	SysErrOutOfGas = ExitCode(7)
+
+	// Indicates message execution is forbidden for the caller by runtime caller validation.
+	SysErrForbidden = ExitCode(8)
+
+	// Indicates actor code performed a disallowed operation. Disallowed operations include:
+	// - mutating state outside of a state acquisition block
+	// - failing to invoke caller validation
+	// - aborting with a reserved exit code (including success or a system error).
+	SysErrorIllegalActor = ExitCode(9)
+
+	// Indicates an invalid argument passed to a runtime method.
+	SysErrorIllegalArgument = ExitCode(10)
+
+	// Unused
+	SysErrReserved2 = ExitCode(11)
+	SysErrReserved3 = ExitCode(12)
+	SysErrReserved4 = ExitCode(13)
+	SysErrReserved5 = ExitCode(14)
+	SysErrReserved6 = ExitCode(15)
+)
+
+// The initial range of exit codes is reserved for system errors.
+// Actors may define codes starting with this one.
+const FirstActorErrorCode = ExitCode(16)
+
+var names = map[ExitCode]string{
+	Ok:                       "Ok",
+	SysErrSenderInvalid:      "SysErrSenderInvalid",
+	SysErrSenderStateInvalid: "SysErrSenderStateInvalid",
+	SysErrInvalidMethod:      "SysErrInvalidMethod",
+	SysErrReserved1:          "SysErrReserved1",
+	SysErrInvalidReceiver:    "SysErrInvalidReceiver",
+	SysErrInsufficientFunds:  "SysErrInsufficientFunds",
+	SysErrOutOfGas:           "SysErrOutOfGas",
+	SysErrForbidden:          "SysErrForbidden",
+	SysErrorIllegalActor:     "SysErrorIllegalActor",
+	SysErrorIllegalArgument:  "SysErrorIllegalArgument",
+	SysErrReserved2:          "SysErrReserved2",
+	SysErrReserved3:          "SysErrReserved3",
+	SysErrReserved4:          "SysErrReserved4",
+	SysErrReserved5:          "SysErrReserved5",
+	SysErrReserved6:          "SysErrReserved6",
+}

extern/go-state-types/gen/gen.go

+package main
+
+import (
+	gen "github.com/whyrusleeping/cbor-gen"
+
+	"github.com/filecoin-project/go-state-types/abi"
+)
+
+func main() {
+	// Common types
+	if err := gen.WriteTupleEncodersToFile("./abi/cbor_gen.go", "abi",
+		abi.PieceInfo{},
+		abi.SectorID{},
+	); err != nil {
+		panic(err)
+	}
+}

extern/go-state-types/go.mod

+module github.com/filecoin-project/go-state-types
+
+go 1.13
+
+require (
+	github.com/filecoin-project/go-address v0.0.3
+	github.com/ipfs/go-cid v0.0.7
+	github.com/multiformats/go-multihash v0.0.14
+	github.com/stretchr/testify v1.6.1
+	github.com/whyrusleeping/cbor-gen v0.0.0-20200812213548-958ddffe352c
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1
+)

extern/go-state-types/go.sum

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+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/filecoin-project/go-address v0.0.3 h1:eVfbdjEbpbzIrbiSa+PiGUY+oDK9HnUn+M1R/ggoHf8=
+github.com/filecoin-project/go-address v0.0.3/go.mod h1:jr8JxKsYx+lQlQZmF5i2U0Z+cGQ59wMIps/8YW/lDj8=
+github.com/filecoin-project/go-crypto v0.0.0-20191218222705-effae4ea9f03 h1:2pMXdBnCiXjfCYx/hLqFxccPoqsSveQFxVLvNxy9bus=
+github.com/filecoin-project/go-crypto v0.0.0-20191218222705-effae4ea9f03/go.mod h1:+viYnvGtUTgJRdy6oaeF4MTFKAfatX071MPDPBL11EQ=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
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+github.com/gxed/hashland/keccakpg v0.0.1/go.mod h1:kRzw3HkwxFU1mpmPP8v1WyQzwdGfmKFJ6tItnhQ67kU=
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+github.com/ipfs/go-cid v0.0.1/go.mod h1:GHWU/WuQdMPmIosc4Yn1bcCT7dSeX4lBafM7iqUPQvM=
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+github.com/ipfs/go-cid v0.0.6/go.mod h1:6Ux9z5e+HpkQdckYoX1PG/6xqKspzlEIR5SDmgqgC/I=
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extern/go-state-types/network/version.go

+package network
+
+import "math"
+
+// Enumeration of network upgrades where actor behaviour can change (without necessarily
+// vendoring and versioning the whole actor codebase).
+type Version uint
+
+const (
+	Version0  = Version(iota) // genesis   (specs-actors v0.9.3)
+	Version1                  // breeze    (specs-actors v0.9.7)
+	Version2                  // smoke     (specs-actors v0.9.8)
+	Version3                  // ignition  (specs-actors v0.9.11)
+	Version4                  // actors v2 (specs-actors v2.0.3)
+	Version5                  // tape      (specs-actors v2.1.0)
+	Version6                  // kumquat   (specs-actors v2.2.0)
+	Version7                  // calico    (specs-actors v2.3.2)
+	Version8                  // persian   (post-2.3.2 behaviour transition)
+	Version9                  // orange    (post-2.3.2 behaviour transition)
+	Version10                 // actors v3 (specs-actors v3.0.3)
+	Version11                 // norwegian (specs-actors v3.1.0)
+	Version12                 // actors v4 (specs-actors v4.0.0)
+	Version13                 // reserved  (specs-actors v5.x)
+
+	// VersionMax is the maximum version number
+	VersionMax = Version(math.MaxUint32)
+)

extern/go-state-types/rt/actor.go

+package rt
+
+import (
+	"github.com/filecoin-project/go-state-types/cbor"
+	"github.com/ipfs/go-cid"
+)
+
+// VMActor is a concrete implementation of an actor, to be used by a Filecoin
+// VM.
+type VMActor interface {
+	// Exports returns a slice of methods exported by this actor, indexed by
+	// method number. Skipped/deprecated method numbers will be nil.
+	Exports() []interface{}
+
+	// Code returns the code ID for this actor.
+	Code() cid.Cid
+
+	// State returns a new State object for this actor. This can be used to
+	// decode the actor's state.
+	State() cbor.Er
+
+	// NOTE: methods like "IsSingleton" are intentionally excluded from this
+	// interface. That way, we can add additional attributes actors in newer
+	// specs-actors versions, without having to update previous specs-actors
+	// versions.
+}
+
+// IsSingletonActor returns true if the actor is a singleton actor (i.e., cannot
+// be constructed).
+func IsSingletonActor(a VMActor) bool {
+	s, ok := a.(interface{ IsSingleton() bool })
+	return ok && s.IsSingleton()
+}

extern/go-state-types/rt/log.go

+package rt
+
+// Specifies importance of message, LogLevel numbering is consistent with the uber-go/zap package.
+type LogLevel int
+
+const (
+	// DebugLevel logs are typically voluminous, and are usually disabled in
+	// production.
+	DEBUG LogLevel = iota - 1
+	// InfoLevel is the default logging priority.
+	INFO
+	// WarnLevel logs are more important than Info, but don't need individual
+	// human review.
+	WARN
+	// ErrorLevel logs are high-priority. If an application is running smoothly,
+	// it shouldn't generate any error-level logs.
+	ERROR
+)

extern/specs-storage/CONTRIBUTING.md

+## Contributing
+
+Please [read the spec process](https://filecoin-project.github.io/specs/#intro__process). Please file PRs on github with fixes.

extern/specs-storage/COPYRIGHT

+Copyright 2020. Protocol Labs, Inc.
+
+This library is dual-licensed under Apache 2.0 and MIT terms.

extern/specs-storage/LICENSE-APACHE

+Copyright 2020. Protocol Labs, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

extern/specs-storage/LICENSE-MIT

+Copyright 2020. Protocol Labs, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

extern/specs-storage/Makefile

+GO_BIN ?= go
+GOLINT ?= golangci-lint
+
+all: build lint test tidy
+.PHONY: all
+
+build:
+	$(GO_BIN) build ./...
+.PHONY: build
+
+test:
+	$(GO_BIN) test ./...
+.PHONY: test
+
+test-coverage:
+	$(GO_BIN) test -coverprofile=coverage.out ./...
+.PHONY: test-coverage
+
+tidy:
+	$(GO_BIN) mod tidy
+.PHONY: tidy
+
+lint:
+	$(GOLINT) run ./...
+.PHONY: lint

extern/specs-storage/README.md

+# specs-storage
+
+Specification of the sector storage interface 
+
+## Disclaimer
+
+Please report your issues with regards to storage-fsm at the [lotus issue tracker](https://github.com/filecoin-project/lotus/issues)

extern/specs-storage/go.mod

+module github.com/filecoin-project/specs-storage
+
+go 1.13
+
+require (
+	github.com/filecoin-project/go-state-types v0.0.0-20200904021452-1883f36ca2f4
+	github.com/filecoin-project/specs-actors v0.9.4
+	github.com/ipfs/go-cid v0.0.7
+	golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 // indirect
+	golang.org/x/sys v0.0.0-20190826190057-c7b8b68b1456 // indirect
+)

extern/specs-storage/go.sum

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extern/specs-storage/storage/storage.go

+package storage
+
+import (
+	"context"
+	"io"
+
+	"github.com/filecoin-project/go-state-types/abi"
+	"github.com/ipfs/go-cid"
+
+	proof "github.com/filecoin-project/specs-actors/actors/runtime/proof"
+)
+
+type Data = io.Reader
+
+type SectorRef struct {
+	ID        abi.SectorID
+	ProofType abi.RegisteredSealProof
+}
+
+type Storage interface {
+	// Creates a new empty sector (only allocate on disk. Layers above
+	//  storage are responsible for assigning sector IDs)
+	NewSector(ctx context.Context, sector SectorRef) error
+	// Add a piece to an existing *unsealed* sector
+	AddPiece(ctx context.Context, sector SectorRef, pieceSizes []abi.UnpaddedPieceSize, newPieceSize abi.UnpaddedPieceSize, pieceData Data) (abi.PieceInfo, error)
+}
+
+type Prover interface {
+	GenerateWinningPoSt(ctx context.Context, minerID abi.ActorID, sectorInfo []proof.SectorInfo, randomness abi.PoStRandomness) ([]proof.PoStProof, error)
+	GenerateWindowPoSt(ctx context.Context, minerID abi.ActorID, sectorInfo []proof.SectorInfo, randomness abi.PoStRandomness) (proof []proof.PoStProof, skipped []abi.SectorID, err error)
+}
+
+type PreCommit1Out []byte
+
+type Commit1Out []byte
+
+type Proof []byte
+
+type SectorCids struct {
+	Unsealed cid.Cid
+	Sealed   cid.Cid
+}
+
+type Range struct {
+	Offset abi.UnpaddedPieceSize
+	Size   abi.UnpaddedPieceSize
+}
+
+type Sealer interface {
+	SealPreCommit1(ctx context.Context, sector SectorRef, ticket abi.SealRandomness, pieces []abi.PieceInfo) (PreCommit1Out, error)
+	SealPreCommit2(ctx context.Context, sector SectorRef, pc1o PreCommit1Out) (SectorCids, error)
+
+	SealCommit1(ctx context.Context, sector SectorRef, ticket abi.SealRandomness, seed abi.InteractiveSealRandomness, pieces []abi.PieceInfo, cids SectorCids) (Commit1Out, error)
+	SealCommit2(ctx context.Context, sector SectorRef, c1o Commit1Out) (Proof, error)
+
+	FinalizeSector(ctx context.Context, sector SectorRef, keepUnsealed []Range) error
+
+	// ReleaseUnsealed marks parts of the unsealed sector file as safe to drop
+	//  (called by the fsm on restart, allows storage to keep no persistent
+	//   state about unsealed fast-retrieval copies)
+	ReleaseUnsealed(ctx context.Context, sector SectorRef, safeToFree []Range) error
+
+	// Removes all data associated with the specified sector
+	Remove(ctx context.Context, sector SectorRef) error
+}