64 lines
1.8 KiB
Nim
64 lines
1.8 KiB
Nim
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import
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strutils, options
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import
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nimcrypto, web3/[encoding, ethtypes]
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import
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../../types/[rpc_response], ../coder, eth, transactions
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export sendTransaction
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type Method* = object
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name*: string
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signature*: string
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proc encodeMethod(self: Method): string =
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($nimcrypto.keccak256.digest(self.signature))[0..<8].toLower
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proc encodeAbi*(self: Method, obj: object = RootObj()): string =
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result = "0x" & self.encodeMethod()
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# .fields is an iterator, and there's no way to get a count of an iterator
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# in nim, so we have to loop and increment a counter
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var fieldCount = 0
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for i in obj.fields:
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fieldCount += 1
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var
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offset = 32*fieldCount
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data = ""
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for field in obj.fields:
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let encoded = encode(field)
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if encoded.dynamic:
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result &= offset.toHex(64).toLower
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data &= encoded.data
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offset += encoded.data.len
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else:
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result &= encoded.data
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result &= data
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proc estimateGas*(self: Method, tx: var EthSend, methodDescriptor: object, success: var bool): string =
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success = true
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tx.data = self.encodeAbi(methodDescriptor)
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try:
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let response = transactions.estimateGas(tx)
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result = response.result # gas estimate in hex
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except RpcException as e:
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success = false
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result = e.msg
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proc send*(self: Method, tx: var EthSend, methodDescriptor: object, password: string, success: var bool): string =
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tx.data = self.encodeAbi(methodDescriptor)
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result = eth.sendTransaction(tx, password, success)
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proc call*[T](self: Method, tx: var EthSend, methodDescriptor: object, success: var bool): T =
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success = true
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tx.data = self.encodeAbi(methodDescriptor)
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let response: RpcResponse
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try:
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response = transactions.call(tx)
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except RpcException as e:
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success = false
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result = e.msg
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result = coder.decodeContractResponse[T](response.result)
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