import eth/trie/db, eth/[trie, rlp, common], nimcrypto export nimcrypto.`$` proc calcRootHash[T](items: openArray[T]): Hash256 = var tr = initHexaryTrie(newMemoryDB()) for i, t in items: tr.put(rlp.encode(i), rlp.encode(t)) return tr.rootHash template calcTxRoot*(transactions: openArray[Transaction]): Hash256 = calcRootHash(transactions) template calcReceiptRoot*(receipts: openArray[Receipt]): Hash256 = calcRootHash(receipts) func keccakHash*(value: openarray[byte]): Hash256 {.inline.} = keccak256.digest value func generateAddress*(address: EthAddress, nonce: AccountNonce): EthAddress = result[0..19] = keccakHash(rlp.encodeList(address, nonce)).data.toOpenArray(12, 31) func generateSafeAddress*(address: EthAddress, salt: Uint256, data: openArray[byte]): EthAddress = const prefix = [0xff.byte] let dataHash = keccakHash(data) var hashResult: Hash256 var ctx: keccak256 ctx.init() ctx.update(prefix) ctx.update(address) ctx.update(salt.toByteArrayBE()) ctx.update(dataHash.data) ctx.finish hashResult.data ctx.clear() result[0..19] = hashResult.data.toOpenArray(12, 31) func hash*(b: BlockHeader): Hash256 {.inline.} = rlpHash(b)