60 lines
1.8 KiB
Go
60 lines
1.8 KiB
Go
// VulcanizeDB
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// Copyright © 2018 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package constants
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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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panic("Error: could not get Solidity method signature for: " + name)
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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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