nimbus-eth1/nimbus/rpc/merge/mergeutils.nim

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# Nimbus
# Copyright (c) 2022-2023 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
# * MIT license ([LICENSE-MIT](LICENSE-MIT))
# at your option.
# This file may not be copied, modified, or distributed except according to
# those terms.
import
std/[typetraits, times, strutils, sequtils],
nimcrypto/[hash, sha2],
web3/engine_api_types,
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json_rpc/errors,
eth/[trie, rlp, common, common/eth_types, trie/db],
stew/[results, byteutils],
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../../constants,
./mergetypes
type Hash256 = eth_types.Hash256
proc computePayloadId*(headBlockHash: Hash256, params: PayloadAttributesV1 | PayloadAttributesV2): PayloadID =
var dest: Hash256
var ctx: sha256
ctx.init()
ctx.update(headBlockHash.data)
ctx.update(toBytesBE distinctBase params.timestamp)
ctx.update(distinctBase params.prevRandao)
ctx.update(distinctBase params.suggestedFeeRecipient)
# FIXME-Adam: Do we need to include the withdrawals in this calculation?
# https://github.com/ethereum/go-ethereum/pull/25838#discussion_r1024340383
# "The execution api specs define that this ID can be completely random. It
# used to be derived from payload attributes in the past, but maybe it's
# time to use a randomized ID to not break it with any changes to the
# attributes?"
ctx.finish dest.data
ctx.clear()
(distinctBase result)[0..7] = dest.data[0..7]
proc append*(w: var RlpWriter, q: Quantity) =
w.append(uint64(q))
proc append*(w: var RlpWriter, a: Address) =
w.append(distinctBase(a))
template unsafeQuantityToInt64(q: Quantity): int64 =
int64 q
template asEthHash*(hash: engine_api_types.BlockHash): Hash256 =
Hash256(data: distinctBase(hash))
proc calcRootHashRlp*(items: openArray[seq[byte]]): Hash256 =
var tr = initHexaryTrie(newMemoryDB())
for i, t in items:
tr.put(rlp.encode(i), t)
return tr.rootHash()
proc calcWithdrawalsRoot(withdrawals: seq[WithdrawalV1]): Hash256 =
calcRootHashRlp(withdrawals.map(writer.encode))
func maybeWithdrawals*(payload: ExecutionPayloadV1 | ExecutionPayloadV2): Option[seq[WithdrawalV1]] =
when payload is ExecutionPayloadV1:
none[seq[WithdrawalV1]]()
else:
some(payload.withdrawals)
proc toBlockHeader*(payload: ExecutionPayloadV1 | ExecutionPayloadV2): EthBlockHeader =
let transactions = seq[seq[byte]](payload.transactions)
let txRoot = calcRootHashRlp(transactions)
EthBlockHeader(
parentHash : payload.parentHash.asEthHash,
ommersHash : EMPTY_UNCLE_HASH,
coinbase : EthAddress payload.feeRecipient,
stateRoot : payload.stateRoot.asEthHash,
txRoot : txRoot,
receiptRoot : payload.receiptsRoot.asEthHash,
bloom : distinctBase(payload.logsBloom),
difficulty : default(DifficultyInt),
blockNumber : payload.blockNumber.distinctBase.u256,
gasLimit : payload.gasLimit.unsafeQuantityToInt64,
gasUsed : payload.gasUsed.unsafeQuantityToInt64,
timestamp : fromUnix payload.timestamp.unsafeQuantityToInt64,
extraData : bytes payload.extraData,
mixDigest : payload.prevRandao.asEthHash, # EIP-4399 redefine `mixDigest` -> `prevRandao`
nonce : default(BlockNonce),
fee : some payload.baseFeePerGas,
withdrawalsRoot: payload.maybeWithdrawals.map(calcWithdrawalsRoot) # EIP-4895
)
proc toWithdrawal*(w: WithdrawalV1): Withdrawal =
Withdrawal(
index: uint64(w.index),
validatorIndex: uint64(w.validatorIndex),
address: distinctBase(w.address),
amount: uint64(w.amount) # AARDVARK: is this wei or gwei or what?
)
proc toWithdrawalV1*(w: Withdrawal): WithdrawalV1 =
WithdrawalV1(
index: Quantity(w.index),
validatorIndex: Quantity(w.validatorIndex),
address: Address(w.address),
amount: Quantity(w.amount) # AARDVARK: is this wei or gwei or what?
)
proc toTypedTransaction*(tx: Transaction): TypedTransaction =
TypedTransaction(rlp.encode(tx))
proc toBlockBody*(payload: ExecutionPayloadV1 | ExecutionPayloadV2): BlockBody =
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result.transactions.setLen(payload.transactions.len)
for i, tx in payload.transactions:
result.transactions[i] = rlp.decode(distinctBase tx, Transaction)
when payload is ExecutionPayloadV2:
let ws = payload.maybeWithdrawals
result.withdrawals =
if ws.isSome:
some(ws.get.map(toWithdrawal))
else:
none[seq[Withdrawal]]()
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proc `$`*(x: BlockHash): string =
toHex(x)
template toValidHash*(x: Hash256): Option[BlockHash] =
some(BlockHash(x.data))
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proc validateBlockHash*(header: EthBlockHeader, gotHash: Hash256): Result[void, PayloadStatusV1] =
let wantHash = header.blockHash
if wantHash != gotHash:
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let status = PayloadStatusV1(
# This used to say invalid_block_hash, but see here:
# https://github.com/ethereum/execution-apis/blob/main/src/engine/shanghai.md#engine_newpayloadv2
# "INVALID_BLOCK_HASH status value is supplanted by INVALID."
status: PayloadExecutionStatus.invalid,
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validationError: some("blockhash mismatch, want $1, got $2" % [$wantHash, $gotHash])
)
return err(status)
return ok()
proc simpleFCU*(status: PayloadExecutionStatus): ForkchoiceUpdatedResponse =
ForkchoiceUpdatedResponse(payloadStatus: PayloadStatusV1(status: status))
proc simpleFCU*(status: PayloadExecutionStatus, msg: string): ForkchoiceUpdatedResponse =
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ForkchoiceUpdatedResponse(
payloadStatus: PayloadStatusV1(
status: status,
validationError: some(msg)
)
)
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proc invalidFCU*(hash: Hash256 = Hash256()): ForkchoiceUpdatedResponse =
ForkchoiceUpdatedResponse(payloadStatus:
PayloadStatusV1(
status: PayloadExecutionStatus.invalid,
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latestValidHash: toValidHash(hash)
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)
)
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proc validFCU*(id: Option[PayloadID], validHash: Hash256): ForkchoiceUpdatedResponse =
ForkchoiceUpdatedResponse(
payloadStatus: PayloadStatusV1(
status: PayloadExecutionStatus.valid,
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latestValidHash: toValidHash(validHash)
),
payloadId: id
)
proc invalidStatus*(validHash: Hash256, msg: string): PayloadStatusV1 =
PayloadStatusV1(
status: PayloadExecutionStatus.invalid,
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latestValidHash: toValidHash(validHash),
validationError: some(msg)
)
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proc invalidStatus*(validHash: Hash256 = Hash256()): PayloadStatusV1 =
PayloadStatusV1(
status: PayloadExecutionStatus.invalid,
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latestValidHash: toValidHash(validHash)
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)
proc acceptedStatus*(validHash: Hash256): PayloadStatusV1 =
PayloadStatusV1(
status: PayloadExecutionStatus.accepted,
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latestValidHash: toValidHash(validHash)
)
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proc acceptedStatus*(): PayloadStatusV1 =
PayloadStatusV1(
status: PayloadExecutionStatus.accepted
)
proc validStatus*(validHash: Hash256): PayloadStatusV1 =
PayloadStatusV1(
status: PayloadExecutionStatus.valid,
latestValidHash: toValidHash(validHash)
)
proc invalidParams*(msg: string): ref InvalidRequest =
(ref InvalidRequest)(
code: engineApiInvalidParams,
msg: msg
)
proc unknownPayload*(msg: string): ref InvalidRequest =
(ref InvalidRequest)(
code: engineApiUnknownPayload,
msg: msg
)
proc invalidAttr*(msg: string): ref InvalidRequest =
(ref InvalidRequest)(
code: engineApiInvalidPayloadAttributes,
msg: msg
)