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// Copyright 2016 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
// Command bzzhash computes a swarm tree hash.
package main
import (
"context"
"encoding/hex"
"fmt"
"os"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/contracts/ens"
"github.com/ethereum/go-ethereum/swarm/chunk"
"github.com/ethereum/go-ethereum/swarm/storage"
"gopkg.in/urfave/cli.v1"
)
var hashCommand = cli.Command{
Action: hash,
CustomHelpTemplate: helpTemplate,
Name: "hash",
Usage: "print the swarm hash of a file or directory",
ArgsUsage: "<file>",
Description: "Prints the swarm hash of file or directory",
Subcommands: []cli.Command{
{
CustomHelpTemplate: helpTemplate,
Name: "ens",
Usage: "converts a swarm hash to an ens EIP1577 compatible CIDv1 hash",
ArgsUsage: "<ref>",
Description: "",
Subcommands: []cli.Command{
{
Action: encodeEipHash,
CustomHelpTemplate: helpTemplate,
Name: "contenthash",
Usage: "converts a swarm hash to an ens EIP1577 compatible CIDv1 hash",
ArgsUsage: "<ref>",
Description: "",
},
{
Action: ensNodeHash,
CustomHelpTemplate: helpTemplate,
Name: "node",
Usage: "converts an ens name to an ENS node hash",
ArgsUsage: "<ref>",
Description: "",
},
},
},
}}
func hash(ctx *cli.Context) {
args := ctx.Args()
if len(args) < 1 {
utils.Fatalf("Usage: swarm hash <file name>")
}
f, err := os.Open(args[0])
if err != nil {
utils.Fatalf("Error opening file " + args[1])
}
defer f.Close()
stat, _ := f.Stat()
fileStore := storage.NewFileStore(&storage.FakeChunkStore{}, storage.NewFileStoreParams(), chunk.NewTags())
addr, _, err := fileStore.Store(context.TODO(), f, stat.Size(), false)
if err != nil {
utils.Fatalf("%v\n", err)
} else {
fmt.Printf("%v\n", addr)
}
}
func ensNodeHash(ctx *cli.Context) {
args := ctx.Args()
if len(args) < 1 {
utils.Fatalf("Usage: swarm hash ens node <ens name>")
}
ensName := args[0]
hash := ens.EnsNode(ensName)
stringHex := hex.EncodeToString(hash[:])
fmt.Println(stringHex)
}
func encodeEipHash(ctx *cli.Context) {
args := ctx.Args()
if len(args) < 1 {
utils.Fatalf("Usage: swarm hash ens <swarm hash>")
}
swarmHash := args[0]
hash := common.HexToHash(swarmHash)
ensHash, err := ens.EncodeSwarmHash(hash)
if err != nil {
utils.Fatalf("error converting swarm hash", err)
}
stringHex := hex.EncodeToString(ensHash)
fmt.Println(stringHex)
}