forked from cerc-io/plugeth
58 lines
1.9 KiB
Go
58 lines
1.9 KiB
Go
// Copyright 2016 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package abi
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
)
|
|
|
|
// Event is an event potentially triggered by the EVM's LOG mechanism. The Event
|
|
// holds type information (inputs) about the yielded output. Anonymous events
|
|
// don't get the signature canonical representation as the first LOG topic.
|
|
type Event struct {
|
|
Name string
|
|
Anonymous bool
|
|
Inputs Arguments
|
|
}
|
|
|
|
func (event Event) String() string {
|
|
inputs := make([]string, len(event.Inputs))
|
|
for i, input := range event.Inputs {
|
|
inputs[i] = fmt.Sprintf("%v %v", input.Name, input.Type)
|
|
if input.Indexed {
|
|
inputs[i] = fmt.Sprintf("%v indexed %v", input.Name, input.Type)
|
|
}
|
|
}
|
|
return fmt.Sprintf("event %v(%v)", event.Name, strings.Join(inputs, ", "))
|
|
}
|
|
|
|
// Id returns the canonical representation of the event's signature used by the
|
|
// abi definition to identify event names and types.
|
|
func (e Event) Id() common.Hash {
|
|
types := make([]string, len(e.Inputs))
|
|
i := 0
|
|
for _, input := range e.Inputs {
|
|
types[i] = input.Type.String()
|
|
i++
|
|
}
|
|
return common.BytesToHash(crypto.Keccak256([]byte(fmt.Sprintf("%v(%v)", e.Name, strings.Join(types, ",")))))
|
|
}
|