forked from laizy/ontology-old
/
address.go
76 lines (65 loc) · 2.03 KB
/
address.go
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/*
* Copyright (C) 2018 The ontology Authors
* This file is part of The ontology library.
*
* The ontology 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 ontology 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 ontology. If not, see <http://www.gnu.org/licenses/>.
*/
package types
import (
"bytes"
"crypto/sha256"
"errors"
"sort"
"github.com/ontio/ontology/common"
"github.com/ontio/ontology/common/serialization"
"github.com/ontio/ontology-crypto/keypair"
"golang.org/x/crypto/ripemd160"
)
func AddressFromPubKey(pubkey keypair.PublicKey) common.Address {
buf := keypair.SerializePublicKey(pubkey)
var addr common.Address
temp := sha256.Sum256(buf)
md := ripemd160.New()
md.Write(temp[:])
md.Sum(addr[:0])
addr[0] = 0x01
return addr
}
func AddressFromMultiPubKeys(pubkeys []keypair.PublicKey, m int) (common.Address, error) {
var addr common.Address
n := len(pubkeys)
if m <= 0 || m > n || n > 24 {
return addr, errors.New("wrong multi-sig param")
}
list := keypair.NewPublicList(pubkeys)
sort.Sort(list)
var buf bytes.Buffer
serialization.WriteUint8(&buf, uint8(n))
serialization.WriteUint8(&buf, uint8(m))
for _, key := range list {
err := serialization.WriteVarBytes(&buf, key)
if err != nil {
return addr, err
}
}
temp := sha256.Sum256(buf.Bytes())
md := ripemd160.New()
md.Write(temp[:])
md.Sum(addr[:0])
addr[0] = 0x02
return addr, nil
}
func AddressFromBookkeepers(bookkeepers []keypair.PublicKey) (common.Address, error) {
return AddressFromMultiPubKeys(bookkeepers, len(bookkeepers)-(len(bookkeepers)-1)/3)
}