38 lines
1.3 KiB
Nim
38 lines
1.3 KiB
Nim
import pkg/contractabi
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import pkg/contractabi/selector
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import ../basics
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import ../errors
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func selector(E: type): FunctionSelector =
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when compiles(E.arguments):
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selector($E, typeof(E.arguments))
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else:
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selector($E, tuple[])
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func matchesSelector(E: type, data: seq[byte]): bool =
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const selector = E.selector.toArray
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data.len >= 4 and selector[0..<4] == data[0..<4]
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func decodeArguments(E: type, data: seq[byte]): auto =
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AbiDecoder.decode(data[4..^1], E.arguments)
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func decode*[E: SolidityError](_: type E, data: seq[byte]): ?!(ref E) =
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if not E.matchesSelector(data):
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return failure "unable to decode " & $E & ": selector doesn't match"
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when compiles(E.arguments):
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without arguments =? E.decodeArguments(data), error:
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return failure "unable to decode arguments of " & $E & ": " & error.msg
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let message = "EVM reverted: " & $E & $arguments
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success (ref E)(msg: message, arguments: arguments)
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else:
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if data.len > 4:
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return failure "unable to decode: " & $E & ".arguments is not defined"
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let message = "EVM reverted: " & $E & "()"
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success (ref E)(msg: message)
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func encode*[E: SolidityError](_: type AbiEncoder, error: ref E): seq[byte] =
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result = @(E.selector.toArray)
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when compiles(error.arguments):
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result &= AbiEncoder.encode(error.arguments)
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