53 lines
1.5 KiB
Nim
53 lines
1.5 KiB
Nim
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# light client proxy
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# Copyright (c) 2022 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.push raises: [Defect].}
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import
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std/[sequtils, typetraits],
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stint,
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eth/common/eth_types as etypes,
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eth/common/eth_types_rlp,
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eth/rlp,
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eth/trie/hexary,
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web3/ethtypes
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func toMDigest(arg: FixedBytes[32]): MDigest[256] =
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MDigest[256](data: distinctBase(arg))
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proc isAccountProofValid*(
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stateRoot: FixedBytes[32],
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accountAddress: Address,
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accountBalance: UInt256,
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accountNonce: Quantity,
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accountCodeHash: CodeHash,
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accountStorageRootHash: StorageHash,
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mptNodes: seq[RlpEncodedBytes]
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): bool =
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let
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mptNodesBytes = mptNodes.mapIt(distinctBase(it))
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keccakStateRootHash = toMDigest(stateRoot)
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acc = etypes.Account(
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nonce: distinctBase(accountNonce),
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balance: accountBalance,
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storageRoot: toMDigest(accountStorageRootHash),
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codeHash: toMDigest(accountCodeHash)
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)
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accountEncoded = rlp.encode(acc)
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accountKey = toSeq(keccakHash(distinctBase(accountAddress)).data)
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try:
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return isValidBranch(
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mptNodesBytes,
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keccakStateRootHash,
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accountKey,
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accountEncoded
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)
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except RlpError:
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return false
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