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bind: Static byte arrays should be right-padded

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Per https://solidity.readthedocs.io/en/v0.5.3/abi-spec.html:

"bytes<M>: enc(X) is the sequence of bytes in X padded with trailing zero-bytes to a length of 32 bytes"
This commit is contained in:
Jeremy McNevin
2019-01-28 12:47:24 -06:00
committed by Péter Szilágyi
parent 6c312a24b6
commit 7640c9c933
2 changed files with 109 additions and 2 deletions
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8
accounts/abi/bind/topics.go
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@ -83,8 +83,10 @@ func makeTopics(query ...[]interface{}) ([][]common.Hash, error) {
val := reflect.ValueOf(rule)
switch {
// static byte array
case val.Kind() == reflect.Array && reflect.TypeOf(rule).Elem().Kind() == reflect.Uint8:
reflect.Copy(reflect.ValueOf(topic[common.HashLength-val.Len():]), val)
reflect.Copy(reflect.ValueOf(topic[:val.Len()]), val)
default:
return nil, fmt.Errorf("unsupported indexed type: %T", rule)
@ -175,8 +177,10 @@ func parseTopics(out interface{}, fields abi.Arguments, topics []common.Hash) er
default:
// Ran out of custom types, try the crazies
switch {
// static byte array
case arg.Type.T == abi.FixedBytesTy:
reflect.Copy(field, reflect.ValueOf(topics[0][common.HashLength-arg.Type.Size:]))
reflect.Copy(field, reflect.ValueOf(topics[0][:arg.Type.Size]))
default:
return fmt.Errorf("unsupported indexed type: %v", arg.Type)