87 lines
3.1 KiB
Nim
87 lines
3.1 KiB
Nim
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import
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std/typetraits,
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eth/common/eth_types as etypes,
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eth/[trie, rlp, trie/db],
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stint,
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web3
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template unsafeQuantityToInt64(q: Quantity): int64 =
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int64 q
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func toFixedBytes(d: MDigest[256]): FixedBytes[32] =
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FixedBytes[32](d.data)
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template asEthHash(hash: BlockHash): Hash256 =
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Hash256(data: distinctBase(hash))
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proc calculateTransactionData(
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items: openArray[TypedTransaction]): (etypes.Hash256, seq[TxHash], uint64) =
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## returns tuple composed of
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## - root of transactions trie
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## - list of transactions hashes
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## - total size of transactions in block
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var tr = initHexaryTrie(newMemoryDB())
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var txHashes: seq[TxHash]
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var txSize: uint64
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for i, t in items:
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let tx = distinctBase(t)
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txSize = txSize + uint64(len(tx))
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tr.put(rlp.encode(i), tx)
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txHashes.add(toFixedBytes(keccakHash(tx)))
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return (tr.rootHash(), txHashes, txSize)
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func blockHeaderSize(payload: ExecutionPayloadV1, txRoot: etypes.Hash256): uint64 =
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let bh = etypes.BlockHeader(
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parentHash : payload.parentHash.asEthHash,
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ommersHash : etypes.EMPTY_UNCLE_HASH,
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coinbase : etypes.EthAddress payload.feeRecipient,
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stateRoot : payload.stateRoot.asEthHash,
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txRoot : txRoot,
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receiptRoot : payload.receiptsRoot.asEthHash,
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bloom : distinctBase(payload.logsBloom),
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difficulty : default(etypes.DifficultyInt),
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blockNumber : payload.blockNumber.distinctBase.u256,
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gasLimit : payload.gasLimit.unsafeQuantityToInt64,
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gasUsed : payload.gasUsed.unsafeQuantityToInt64,
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timestamp : fromUnix payload.timestamp.unsafeQuantityToInt64,
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extraData : bytes payload.extraData,
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mixDigest : payload.prevRandao.asEthHash,
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nonce : default(etypes.BlockNonce),
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fee : some payload.baseFeePerGas
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)
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return uint64(len(rlp.encode(bh)))
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proc asBlockObject*(p: ExecutionPayloadV1): BlockObject =
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# TODO currently we always calculate txHashes as BlockObject does not have
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# option of returning full transactions. It needs fixing at nim-web3 library
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# level
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let (txRoot, txHashes, txSize) = calculateTransactionData(p.transactions)
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let headerSize = blockHeaderSize(p, txRoot)
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let blockSize = txSize + headerSize
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BlockObject(
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number: p.blockNumber,
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hash: p.blockHash,
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parentHash: p.parentHash,
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sha3Uncles: FixedBytes(etypes.EMPTY_UNCLE_HASH.data),
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logsBloom: p.logsBloom,
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transactionsRoot: toFixedBytes(txRoot),
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stateRoot: p.stateRoot,
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receiptsRoot: p.receiptsRoot,
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miner: p.feeRecipient,
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difficulty: UInt256.zero,
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extraData: p.extraData.toHex,
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gasLimit: p.gasLimit,
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gasUsed: p.gasUsed,
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timestamp: p.timestamp,
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nonce: some(default(FixedBytes[8])),
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size: Quantity(blockSize),
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# TODO It does not matter what we put here in after merge blocks.
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# Other projects like `helios` return `0`, data providers like alchemy return
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# transition difficulty. For now retruning `0` as this is a bit easier to do.
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totalDifficulty: UInt256.zero,
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transactions: txHashes,
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uncles: @[],
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baseFeePerGas: some(p.baseFeePerGas)
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)
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