* usbwallet: check returned error when decoding hexstr

* Update accounts/usbwallet/ledger.go
Co-Authored-By: CoreyLin <514971757@qq.com>

* usbwallet: check hex decode error

* swarm/shed: add metrics to each shed db

* swarm/shed: push metrics prefix up

* swarm/shed: rename prefix to metricsPrefix

* swarm/shed: unexport Meter, remove Mutex for quit channel

* geth/core/eth: implement constantinople override flag

* les: implemnent constantinople override flag for les clients

* cmd/geth, eth, les: fix typo, move flag to experimentals

cmd/faucet, cmd/puppeth: fix enode and compose regressions, expose UDP

cmd/swarm, metrics, swarm/api/client, swarm/storage, swarm/metrics, swarm/api/http: add instrumentation (#18274)

params: update CHTs for the 1.8.20 release

cmd, eth: add support for `--whitelist <blocknum>=<hash>`

* Rejects peers that respond with a different hash for any of the passed in block numbers.
* Meant for emergency situations when the network forks unexpectedly.

* Fix typo in interfaces.go

* Update interfaces.go

light: fix duplicated argument in bytes.Equal call

Most probably a copy/paste kind of error.
Found with gocritic `dupArg` checker.

node,rpc: remove unused log in ipc listener function

core/vm, eth: add standard json tracing into filesystem dumps

params: set mainnet and Rinkeby Constantinople fork blocks

* eth: fixed incorrect storage from prestate_tracer

* eth/tracers: updated assets.go

cmd/utils: max out the OS file allowance, don't cap to 2K

* swarm/network: Hive - do not notify peer if discovery is disabled

* p2p/simulations: validate all connections on loading a snapshot

* p2p/simulations: track all connections in on snapshot loading

* p2p/simulations: add snapshotLoadTimeout variable

* p2p/simulations: ignore control events in snapshot load

* p2p/simulations: simplify event loop synchronization

* p2p/simulations: return already connected error from Load function

* p2p/simulations: log warning on snapshot loading disconnection

Until this commit, when sending an RPC request that called `NewEVM`, a blank `vm.Config`
would be taken so as to set some options, based on the default configuration. If some extra
configuration switches were passed to the blockchain, those would be ignored.

This PR adds a function to get the config from the blockchain, and this is what is now used
for RPC calls.

Some subsequent changes need to be made, see https://github.com/ethereum/go-ethereum/pull/17955#pullrequestreview-182237244
for the details of the discussion.

* added tests for new abi encoding features (#4)

* added tests from bytes32[][] and string[]

* added offset to other types

* formatting

* Abi/dynamic types (#5)

* Revert "Abi/dynamic types (#5)" (#6)

This reverts commit dabca31d797623d43bd780721fc0ad461d24be53.

* Abi/dynamic types (#7)

* some cleanup

* Apply suggestions from code review

apply suggestions
Co-Authored-By: vedhavyas <vedhavyas.singareddi@gmail.com>

* added better formatting (#8)

* review chnages

* better comments

cmd/puppeth: implement chainspec converters

cmd/puppeth: enforce lowercase network names