194 lines
6.8 KiB
Nim
194 lines
6.8 KiB
Nim
# Nimbus
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# Copyright (c) 2018 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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# * MIT license ([LICENSE-MIT](LICENSE-MIT))
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# at your option.
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# This file may not be copied, modified, or distributed except according to
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# those terms.
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import hexstrings, eth/[common, rlp, keys, trie/db], stew/byteutils, nimcrypto,
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../db/db_chain, strutils, algorithm, options, times, json,
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../constants, stint, hexstrings, rpc_types,
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../utils, ../transaction,
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../transaction/call_evm
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func toAddress*(value: EthAddressStr): EthAddress = hexToPaddedByteArray[20](value.string)
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func toHash*(value: array[32, byte]): Hash256 {.inline.} =
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result.data = value
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func toHash*(value: EthHashStr): Hash256 {.inline.} =
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result = hexToPaddedByteArray[32](value.string).toHash
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func hexToInt*(s: string, T: typedesc[SomeInteger]): T =
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var i = 0
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if s[i] == '0' and (s[i+1] in {'x', 'X'}): inc(i, 2)
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if s.len - i > sizeof(T) * 2:
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raise newException(ValueError, "input hex too big for destination int")
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while i < s.len:
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result = result shl 4 or readHexChar(s[i]).T
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inc(i)
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proc headerFromTag*(chain: BaseChainDB, blockTag: string): BlockHeader =
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let tag = blockTag.toLowerAscii
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case tag
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of "latest": result = chain.getCanonicalHead()
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of "earliest": result = chain.getBlockHeader(GENESIS_BLOCK_NUMBER)
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of "pending":
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#TODO: Implement get pending block
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raise newException(ValueError, "Pending tag not yet implemented")
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else:
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# Raises are trapped and wrapped in JSON when returned to the user.
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tag.validateHexQuantity
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let blockNum = stint.fromHex(UInt256, tag)
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result = chain.getBlockHeader(blockNum.toBlockNumber)
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proc calculateMedianGasPrice*(chain: BaseChainDB): GasInt =
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var prices = newSeqOfCap[GasInt](64)
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let header = chain.getCanonicalHead()
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for encodedTx in chain.getBlockTransactionData(header.txRoot):
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let tx = rlp.decode(encodedTx, Transaction)
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prices.add(tx.gasPrice)
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if prices.len > 0:
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sort(prices)
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let middle = prices.len div 2
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if prices.len mod 2 == 0:
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# prevent overflow
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let price = prices[middle].uint64 + prices[middle - 1].uint64
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result = (price div 2).GasInt
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else:
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result = prices[middle]
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proc unsignedTx*(tx: TxSend, chain: BaseChainDB, defaultNonce: AccountNonce): Transaction =
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if tx.to.isSome:
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result.to = some(toAddress(tx.to.get))
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if tx.gas.isSome:
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result.gasLimit = hexToInt(tx.gas.get().string, GasInt)
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else:
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result.gasLimit = 90000.GasInt
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if tx.gasPrice.isSome:
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result.gasPrice = hexToInt(tx.gasPrice.get().string, GasInt)
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else:
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result.gasPrice = calculateMedianGasPrice(chain)
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if tx.value.isSome:
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result.value = UInt256.fromHex(tx.value.get().string)
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else:
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result.value = 0.u256
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if tx.nonce.isSome:
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result.nonce = hexToInt(tx.nonce.get().string, AccountNonce)
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else:
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result.nonce = defaultNonce
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result.payload = hexToSeqByte(tx.data.string)
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template optionalAddress(src, dst: untyped) =
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if src.isSome:
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dst = some(toAddress(src.get))
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template optionalGas(src, dst: untyped) =
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if src.isSome:
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dst = some(hexToInt(src.get.string, GasInt))
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template optionalU256(src, dst: untyped) =
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if src.isSome:
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dst = some(UInt256.fromHex(src.get.string))
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template optionalBytes(src, dst: untyped) =
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if src.isSome:
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dst = hexToSeqByte(src.get.string)
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proc callData*(call: EthCall): RpcCallData =
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optionalAddress(call.source, result.source)
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optionalAddress(call.to, result.to)
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optionalGas(call.gas, result.gasLimit)
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optionalGas(call.gasPrice, result.gasPrice)
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optionalGas(call.maxFeePerGas, result.maxFee)
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optionalGas(call.maxPriorityFeePerGas, result.maxPriorityFee)
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optionalU256(call.value, result.value)
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optionalBytes(call.data, result.data)
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proc populateTransactionObject*(tx: Transaction, header: BlockHeader, txIndex: int): TransactionObject =
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result.blockHash = some(header.hash)
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result.blockNumber = some(encodeQuantity(header.blockNumber))
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result.`from` = tx.getSender()
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result.gas = encodeQuantity(tx.gasLimit.uint64)
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result.gasPrice = encodeQuantity(tx.gasPrice.uint64)
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result.hash = tx.rlpHash
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result.input = tx.payLoad
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result.nonce = encodeQuantity(tx.nonce.uint64)
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result.to = some(tx.destination)
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result.transactionIndex = some(encodeQuantity(txIndex.uint64))
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result.value = encodeQuantity(tx.value)
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result.v = encodeQuantity(tx.V.uint)
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result.r = encodeQuantity(tx.R)
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result.s = encodeQuantity(tx.S)
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proc populateBlockObject*(header: BlockHeader, chain: BaseChainDB, fullTx: bool, isUncle = false): BlockObject =
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let blockHash = header.blockHash
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result.number = some(encodeQuantity(header.blockNumber))
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result.hash = some(blockHash)
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result.parentHash = header.parentHash
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result.nonce = some(hexDataStr(header.nonce))
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result.sha3Uncles = header.ommersHash
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result.logsBloom = some(header.bloom)
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result.transactionsRoot = header.txRoot
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result.stateRoot = header.stateRoot
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result.receiptsRoot = header.receiptRoot
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result.miner = header.coinbase
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result.difficulty = encodeQuantity(header.difficulty)
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result.extraData = hexDataStr(header.extraData)
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# discard sizeof(seq[byte]) of extraData and use actual length
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let size = sizeof(BlockHeader) - sizeof(Blob) + header.extraData.len
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result.size = encodeQuantity(size.uint)
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result.gasLimit = encodeQuantity(header.gasLimit.uint64)
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result.gasUsed = encodeQuantity(header.gasUsed.uint64)
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result.timestamp = encodeQuantity(header.timeStamp.toUnix.uint64)
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if not isUncle:
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result.totalDifficulty = encodeQuantity(chain.getScore(blockHash))
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result.uncles = chain.getUncleHashes(header)
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if fullTx:
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var i = 0
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for tx in chain.getBlockTransactions(header):
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result.transactions.add %(populateTransactionObject(tx, header, i))
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inc i
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else:
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for x in chain.getBlockTransactionHashes(header):
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result.transactions.add %(x)
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proc populateReceipt*(receipt: Receipt, gasUsed: GasInt, tx: Transaction, txIndex: int, header: BlockHeader): ReceiptObject =
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result.transactionHash = tx.rlpHash
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result.transactionIndex = encodeQuantity(txIndex.uint)
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result.blockHash = header.hash
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result.blockNumber = encodeQuantity(header.blockNumber)
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result.`from` = tx.getSender()
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result.to = some(tx.destination)
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result.cumulativeGasUsed = encodeQuantity(receipt.cumulativeGasUsed.uint64)
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result.gasUsed = encodeQuantity(gasUsed.uint64)
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if tx.contractCreation:
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var sender: EthAddress
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if tx.getSender(sender):
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let contractAddress = generateAddress(sender, tx.nonce)
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result.contractAddress = some(contractAddress)
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result.logs = receipt.logs
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result.logsBloom = receipt.bloom
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# post-transaction stateroot (pre Byzantium).
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if receipt.hasStateRoot:
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result.root = some(receipt.stateRoot)
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else:
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# 1 = success, 0 = failure.
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result.status = some(receipt.status.int)
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