import std/[typetraits, times, strutils], nimcrypto/[hash, sha2], web3/engine_api_types, json_rpc/errors, eth/[trie, rlp, common, trie/db], stew/[objects, results, byteutils], ../../constants, ./mergetypes proc computePayloadId*(headBlockHash: Hash256, params: PayloadAttributesV1): 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) ctx.finish dest.data ctx.clear() (distinctBase result)[0..7] = dest.data[0..7] 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 toBlockHeader*(payload: ExecutionPayloadV1): 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 ) proc toBlockBody*(payload: ExecutionPayloadV1): BlockBody = result.transactions.setLen(payload.transactions.len) for i, tx in payload.transactions: result.transactions[i] = rlp.decode(distinctBase tx, Transaction) proc `$`*(x: BlockHash): string = toHex(x) template toValidHash*(x: Hash256): Option[BlockHash] = some(BlockHash(x.data)) proc validateBlockHash*(header: EthBlockHeader, gotHash: Hash256): Result[void, PayloadStatusV1] = let wantHash = header.blockHash if wantHash != gotHash: let status = PayloadStatusV1( status: PayloadExecutionStatus.invalid_block_hash, 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 = ForkchoiceUpdatedResponse( payloadStatus: PayloadStatusV1( status: status, validationError: some(msg) ) ) proc invalidFCU*(hash: Hash256 = Hash256()): ForkchoiceUpdatedResponse = ForkchoiceUpdatedResponse(payloadStatus: PayloadStatusV1( status: PayloadExecutionStatus.invalid, latestValidHash: toValidHash(hash) ) ) proc validFCU*(id: Option[PayloadID], validHash: Hash256): ForkchoiceUpdatedResponse = ForkchoiceUpdatedResponse( payloadStatus: PayloadStatusV1( status: PayloadExecutionStatus.valid, latestValidHash: toValidHash(validHash) ), payloadId: id ) proc invalidStatus*(validHash: Hash256, msg: string): PayloadStatusV1 = PayloadStatusV1( status: PayloadExecutionStatus.invalid, latestValidHash: toValidHash(validHash), validationError: some(msg) ) proc invalidStatus*(validHash: Hash256 = Hash256()): PayloadStatusV1 = PayloadStatusV1( status: PayloadExecutionStatus.invalid, latestValidHash: toValidHash(validHash) ) proc acceptedStatus*(validHash: Hash256): PayloadStatusV1 = PayloadStatusV1( status: PayloadExecutionStatus.accepted, latestValidHash: toValidHash(validHash) ) 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 )