Make Transaction.data optional

eth_getTransactionByHash responses from geth don't include data, and there was an exception raised, "key not found: data"

ethers/contract.nim

@@ -66,7 +66,7 @@ proc createTransaction(contract: Contract,
   let data = @selector & AbiEncoder.encode(parameters)
   Transaction(
     to: contract.address,
-    data: data,
+    data: some data,
     nonce: overrides.nonce,
     chainId: overrides.chainId,
     gasPrice: overrides.gasPrice,

ethers/providers/jsonrpc/signatures.nim

@@ -5,7 +5,7 @@ proc eth_call(transaction: Transaction, blockTag: BlockTag): seq[byte]
 proc eth_gasPrice(): UInt256
 proc eth_getBlockByNumber(blockTag: BlockTag, includeTransactions: bool): ?Block
 proc eth_getLogs(filter: EventFilter | Filter | FilterByBlockHash): JsonNode
-proc eth_getTransactionByHash(hash: BlockHash): ?Transaction
+proc eth_getTransactionByHash(hash: TransactionHash): ?Transaction
 proc eth_getBlockByHash(hash: BlockHash, includeTransactions: bool): ?Block
 proc eth_getTransactionCount(address: Address, blockTag: BlockTag): UInt256
 proc eth_estimateGas(transaction: Transaction): UInt256

ethers/transaction.nim

@@ -4,7 +4,7 @@ import ./basics
 type Transaction* = object
   sender*: ?Address
   to*: Address
-  data*: seq[byte]
+  data*: ?seq[byte]
   value*: UInt256
   nonce*: ?UInt256
   chainId*: ?UInt256
@@ -19,7 +19,7 @@ func `$`*(transaction: Transaction): string =
     result &= "from: " & $sender & ", "
   result &= "to: " & $transaction.to & ", "
   result &= "value: " & $transaction.value & ", "
-  result &= "data: 0x" & $transaction.data.toHex
+  result &= "data: 0x" & $(transaction.data.?toHex)
   if nonce =? transaction.nonce:
     result &= ", nonce: " & $nonce
   if chainId =? transaction.chainId:

ethers/wallet/signing.nim

@@ -26,7 +26,7 @@ func toSignableTransaction(transaction: Transaction): SignableTransaction =
   signable.gasLimit = GasInt(gasLimit.truncate(uint64))
   signable.to = some EthAddress(transaction.to)
   signable.value = transaction.value
-  signable.payload = transaction.data
+  signable.payload = transaction.data |? newSeq[byte]()
 
   if maxFee =? transaction.maxFee and
      maxPriorityFee =? transaction.maxPriorityFee:

testmodule/examples.nim

@@ -21,4 +21,4 @@ proc example*(_: type UInt256): UInt256 =
   UInt256.fromBytesBE(array[32, byte].example)
 
 proc example*(_: type Transaction): Transaction =
-  Transaction(to: Address.example, data: seq[byte].example)
+  Transaction(to: Address.example, data: some seq[byte].example)

testmodule/providers/jsonrpc/testConversions.nim

@@ -94,3 +94,50 @@ suite "JSON Conversions":
 
     let receipt = TransactionReceipt.fromJson(json)
     check receipt.blockHash.isNone
+
+  test "newHeads subcription raises exception when deserializing to Log":
+    let json = """{
+      "parentHash":"0xd68d4d0f29307df51e1284fc8a13595ae700ef0f1128830a69e6854381363d42",
+      "sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
+      "miner":"0x0000000000000000000000000000000000000000",
+      "stateRoot":"0x1f6f2d05de35bbfd50213be96ddf960d62b978b472c55d6ac223cd648cbbbbb0",
+      "transactionsRoot":"0xb9bb8a26abe091bb628ab2b6585c5af151aeb3984f4ba47a3c65d438283e069d",
+      "receiptsRoot":"0x33f229b7133e1ba3fb524b8af22d8184ca10b2da5bb170092a219c61ca023c1d",
+      "logsBloom":"0x00000000000000000000000000000000000000000020000000000002000000000000000000000000000000000000000000000000000008080000100200200000000000000000000000000008000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000010000040000000000100000000000800000000000000000000000000000000020000000000020000000000000000000000000000040000008000000000000000000020000000000002000000000000000000000000000000000000000000000000000001000010000000000000000020002000000020000000000000008002000000000000",
+      "difficulty":"0x2",
+      "number":"0x21d",
+      "gasLimit":"0x1c1b59a7",
+      "gasUsed":"0xda41b",
+      "timestamp":"0x6509410e",
+      "extraData":"0xd883010b05846765746888676f312e32302e32856c696e7578000000000000007102a27d75709b90ca9eb23cdaaccf4fc2d571d710f3bc5a7dc874f43af116a93ff832576a53c16f0d0aa1cd9e9a1dc0a60126c4d420f72b0866fc96ba6664f601",
+      "mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000",
+      "nonce":"0x0000000000000000",
+      "baseFeePerGas":"0x7",
+      "withdrawalsRoot":null,
+      "hash":"0x64066c7150c660e5357c4b6b02d836c10353dfa8edb32c805fca9367fd29c6e7"
+    }"""
+    expect ValueError:
+      discard Log.fromJson(parseJson(json))
+
+  test "missing data in Transaction isNone":
+    let json = %*{
+      "blockHash":"0x595bffbe897e025ea2df3213c4cc52c3f3d69bc04b49011d558f1b0e70038922",
+      "blockNumber":"0x22e",
+      "from":"0xe00b677c29ff8d8fe6068530e2bc36158c54dd34",
+      "gas":"0x4d4bb",
+      "gasPrice":"0x3b9aca07",
+      "hash":"0xa31608907c338d6497b0c6ec81049d845c7d409490ebf78171f35143897ca790",
+      "input":"0x6368a471d26ff5c7f835c1a8203235e88846ce1a196d6e79df0eaedd1b8ed3deec2ae5c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000012a00000000000000000000000000000000000000000000000000000000000000",
+      "nonce":"0x3",
+      "to":"0x92f09aa59dccb892a9f5406ddd9c0b98f02ea57e",
+      "transactionIndex":"0x3",
+      "value":"0x0",
+      "type":"0x0",
+      "chainId":"0xc0de4",
+      "v":"0x181bec",
+      "r":"0x57ba18460934526333b80b0fea08737c363f3cd5fbec4a25a8a25e3e8acb362a",
+      "s":"0x33aa50bc8bd719b6b17ad0bf52006bf8943999198f2bf731eb33c118091000f2"
+    }
+
+    let receipt = Transaction.fromJson(json)
+    check receipt.data.isNone

testmodule/testWallet.nim

@@ -66,7 +66,7 @@ suite "Wallet":
       gasPrice: some 20 * 10.u256.pow(9),
       gasLimit: some 21000.u256,
       value: 10.u256.pow(18),
-      data: @[]
+      data: none seq[byte]
     )
     let signed = await wallet.signTransaction(transaction)
     check signed.toHex == "f86c098504a817c800825208943535353535353535353535353535353535353535880de0b6b3a76400008025a028ef61340bd939bc2195fe537567866003e1a15d3c71ff63e1590620aa636276a067cbe9d8997f761aecb703304b3800ccf555c9f3dc64214b297fb1966a3b6d83"