59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
// Copyright 2018 Vulcanize
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package shared
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import (
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"fmt"
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"strings"
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"github.com/ethereum/go-ethereum/accounts/abi"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/vulcanize/vulcanizedb/pkg/geth"
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)
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func GetEventSignature(solidityMethodSignature string) string {
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eventSignature := []byte(solidityMethodSignature)
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hash := crypto.Keccak256Hash(eventSignature)
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return hash.Hex()
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}
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func GetLogNoteSignature(solidityMethodSignature string) string {
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rawSignature := GetEventSignature(solidityMethodSignature)
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return rawSignature[:10] + "00000000000000000000000000000000000000000000000000000000"
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}
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func GetSolidityMethodSignature(abi, name string) string {
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parsedAbi, _ := geth.ParseAbi(abi)
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if method, ok := parsedAbi.Methods[name]; ok {
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return method.Sig()
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} else if event, ok := parsedAbi.Events[name]; ok {
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return getEventSignature(event)
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}
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return ""
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}
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func getEventSignature(event abi.Event) string {
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types := make([]string, len(event.Inputs))
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for i, input := range event.Inputs {
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types[i] = input.Type.String()
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i++
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}
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return fmt.Sprintf("%v(%v)", event.Name, strings.Join(types, ","))
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}
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