109 lines
3.4 KiB
Nim
109 lines
3.4 KiB
Nim
import
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std/math,
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eth/[rlp, common/eth_types_rlp],
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stew/byteutils,
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nimcrypto,
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../db/core_db
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export eth_types_rlp
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{.push raises: [].}
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proc calcRootHash[T](items: openArray[T]): Hash256
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{.gcsafe, raises: [CatchableError]} =
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var tr = newCoreDbRef(LegacyDbMemory).mptPrune
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for i, t in items:
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tr.put(rlp.encode(i), rlp.encode(t))
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return tr.rootHash
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template calcTxRoot*(transactions: openArray[Transaction]): Hash256 =
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calcRootHash(transactions)
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template calcWithdrawalsRoot*(withdrawals: openArray[Withdrawal]): Hash256 =
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calcRootHash(withdrawals)
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template calcReceiptRoot*(receipts: openArray[Receipt]): Hash256 =
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calcRootHash(receipts)
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func sumHash*(hashes: varargs[Hash256]): Hash256 =
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var ctx: sha256
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ctx.init()
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for hash in hashes:
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ctx.update hash.data
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ctx.finish result.data
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ctx.clear()
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proc sumHash*(body: BlockBody): Hash256 {.gcsafe, raises: [CatchableError]} =
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let txRoot = calcTxRoot(body.transactions)
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let ommersHash = keccakHash(rlp.encode(body.uncles))
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let wdRoot = if body.withdrawals.isSome:
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calcWithdrawalsRoot(body.withdrawals.get)
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else: EMPTY_ROOT_HASH
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sumHash(txRoot, ommersHash, wdRoot)
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proc sumHash*(header: BlockHeader): Hash256 =
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let wdRoot = if header.withdrawalsRoot.isSome:
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header.withdrawalsRoot.get
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else: EMPTY_ROOT_HASH
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sumHash(header.txRoot, header.ommersHash, wdRoot)
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func generateAddress*(address: EthAddress, nonce: AccountNonce): EthAddress =
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result[0..19] = keccakHash(rlp.encodeList(address, nonce)).data.toOpenArray(12, 31)
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type ContractSalt* = object
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bytes*: array[32, byte]
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const ZERO_CONTRACTSALT* = default(ContractSalt)
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func generateSafeAddress*(address: EthAddress, salt: ContractSalt,
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data: openArray[byte]): EthAddress =
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const prefix = [0xff.byte]
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let
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dataHash = keccakHash(data)
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hashResult = withKeccakHash:
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h.update(prefix)
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h.update(address)
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h.update(salt.bytes)
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h.update(dataHash.data)
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result[0..19] = hashResult.data.toOpenArray(12, 31)
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func hash*(b: BlockHeader): Hash256 {.inline.} =
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rlpHash(b)
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proc crc32*(crc: uint32, buf: openArray[byte]): uint32 =
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const kcrc32 = [ 0'u32, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 0x76dc4190,
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0x6b6b51f4, 0x4db26158, 0x5005713c, 0xedb88320'u32, 0xf00f9344'u32, 0xd6d6a3e8'u32,
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0xcb61b38c'u32, 0x9b64c2b0'u32, 0x86d3d2d4'u32, 0xa00ae278'u32, 0xbdbdf21c'u32]
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var crcu32 = not crc
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for b in buf:
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crcu32 = (crcu32 shr 4) xor kcrc32[int((crcu32 and 0xF) xor (uint32(b) and 0xF'u32))]
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crcu32 = (crcu32 shr 4) xor kcrc32[int((crcu32 and 0xF) xor (uint32(b) shr 4'u32))]
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result = not crcu32
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proc short*(h: Hash256): string =
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var bytes: array[6, byte]
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bytes[0..2] = h.data[0..2]
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bytes[^3..^1] = h.data[^3..^1]
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bytes.toHex
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proc decompose*(rlp: var Rlp,
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header: var BlockHeader,
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body: var BlockBody) {.gcsafe, raises: [RlpError].} =
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var blk = rlp.read(EthBlock)
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header = system.move(blk.header)
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body.transactions = system.move(blk.txs)
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body.uncles = system.move(blk.uncles)
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body.withdrawals = system.move(blk.withdrawals)
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proc decompose*(rlpBytes: openArray[byte],
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header: var BlockHeader,
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body: var BlockBody) {.gcsafe, raises: [RlpError].} =
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var rlp = rlpFromBytes(rlpBytes)
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rlp.decompose(header, body)
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func gwei*(n: uint64): UInt256 =
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n.u256 * (10 ^ 9).u256
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