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channel_exchange.go
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channel_exchange.go
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package actions
import (
"bytes"
"encoding/binary"
"fmt"
"github.com/hacash/core/account"
"github.com/hacash/core/fields"
"github.com/hacash/core/interfaces"
"github.com/hacash/core/interfacev2"
"github.com/hacash/core/stores"
"github.com/hacash/core/sys"
)
////////////////////////////////
// Mutual transfer of channel funds and chain funds, atomic exchange
type ChannelAmountAndOnChainAmountTransferEachOtherByAtomicExchange struct {
ChannelTranferProveBodyHashChecker fields.HashHalfChecker
OnChainTranferToAddress fields.Address // Online transfer collection address
OnChainTranferAmount fields.Amount // Online transfer amount
AddressCount fields.VarUint1 // Signature quantity, can only be 2 or 3
OnchainTransferFromAndMustSignAddresses []fields.Address
// Two or three addresses, the first of which must be the from address for online transfer
// The address list must contain the addresses of both sides of the channel, otherwise the verification will fail when submitting the challenge and Arbitration
// Signature corresponding to address
MustSigns []fields.Sign // 顺序与 []address 顺序必须一致
}
func (elm *ChannelAmountAndOnChainAmountTransferEachOtherByAtomicExchange) Size() uint32 {
size := elm.ChannelTranferProveBodyHashChecker.Size() +
elm.OnChainTranferToAddress.Size() +
elm.OnChainTranferAmount.Size() +
elm.AddressCount.Size()
size += uint32(len(elm.OnchainTransferFromAndMustSignAddresses)) * fields.AddressSize
size += uint32(len(elm.MustSigns)) * fields.SignSize
return size
}
func (elm *ChannelAmountAndOnChainAmountTransferEachOtherByAtomicExchange) SerializeNoSign() ([]byte, error) {
var buffer bytes.Buffer
var bt1, _ = elm.ChannelTranferProveBodyHashChecker.Serialize()
var bt2, _ = elm.OnChainTranferToAddress.Serialize()
var bt3, _ = elm.OnChainTranferAmount.Serialize()
var bt4, _ = elm.AddressCount.Serialize()
buffer.Write(bt1)
buffer.Write(bt2)
buffer.Write(bt3)
buffer.Write(bt4)
for _, addr := range elm.OnchainTransferFromAndMustSignAddresses {
var bt1, _ = addr.Serialize()
buffer.Write(bt1)
}
return buffer.Bytes(), nil
}
func (elm *ChannelAmountAndOnChainAmountTransferEachOtherByAtomicExchange) SignStuffHash() (fields.Hash, error) {
var conbt, e = elm.SerializeNoSign() // Data body
if e != nil {
return nil, e
}
return fields.CalculateHash(conbt), nil
}
func (elm *ChannelAmountAndOnChainAmountTransferEachOtherByAtomicExchange) Serialize() ([]byte, error) {
var buffer bytes.Buffer
var bt1, _ = elm.SerializeNoSign() // Data body
buffer.Write(bt1)
for _, sign := range elm.MustSigns {
var bt1, _ = sign.Serialize()
buffer.Write(bt1)
}
return buffer.Bytes(), nil
}
func (elm *ChannelAmountAndOnChainAmountTransferEachOtherByAtomicExchange) Parse(buf []byte, seek uint32) (uint32, error) {
var e error
seek, e = elm.ChannelTranferProveBodyHashChecker.Parse(buf, seek)
if e != nil {
return 0, e
}
seek, e = elm.OnChainTranferToAddress.Parse(buf, seek)
if e != nil {
return 0, e
}
seek, e = elm.OnChainTranferAmount.Parse(buf, seek)
if e != nil {
return 0, e
}
// address
seek, e = elm.AddressCount.Parse(buf, seek)
if e != nil {
return 0, e
}
scn := int(elm.AddressCount)
elm.OnchainTransferFromAndMustSignAddresses = make([]fields.Address, scn)
for i := 0; i < scn; i++ {
seek, e = elm.OnchainTransferFromAndMustSignAddresses[i].Parse(buf, seek)
if e != nil {
return 0, e
}
}
// autograph
elm.MustSigns = make([]fields.Sign, scn)
for i := 0; i < scn; i++ {
seek, e = elm.MustSigns[i].Parse(buf, seek)
if e != nil {
return 0, e
}
}
// complete
return seek, nil
}
// Check all signatures
func (elm *ChannelAmountAndOnChainAmountTransferEachOtherByAtomicExchange) CheckMustAddressAndSigns() error {
var e error
// Compute hash
conhx, e := elm.SignStuffHash()
if e != nil {
return e
}
// Minimum number of check addresses
sgmn := len(elm.OnchainTransferFromAndMustSignAddresses)
if sgmn < 2 || sgmn > 3 || sgmn != int(elm.AddressCount) || sgmn != len(elm.MustSigns) {
return fmt.Errorf("Address or Sign length error, need 2~3 but got %d, %d, %d.",
sgmn, int(elm.AddressCount), len(elm.MustSigns))
}
// Signatures are arranged by address. Check whether all addresses and signatures match
for i := 0; i < sgmn; i++ {
sign := elm.MustSigns[i]
addr := elm.OnchainTransferFromAndMustSignAddresses[i]
sgaddr := account.NewAddressFromPublicKeyV0(sign.PublicKey)
// Judge address order
if addr.NotEqual(sgaddr) {
return fmt.Errorf("Address not match, need %s nut got %s.",
addr.ToReadable(), fields.Address(sgaddr).ToReadable())
}
// Check signature
ok, _ := account.CheckSignByHash32(conhx, sign.PublicKey, sign.Signature)
if !ok {
return fmt.Errorf("Left account %s verify signature fail.", addr.ToReadable())
}
}
// All signatures verified successfully
return nil
}
////////////////////////////////////////////////////////
// Exchange of channels with atoms in chains
// Submit channel and chain swap transactions
type Action_25_PaymantChannelAndOnchainAtomicExchange struct {
// Atomic swap transaction receipt
ExchangeEvidence ChannelAmountAndOnChainAmountTransferEachOtherByAtomicExchange
// data ptr
belong_trs interfacev2.Transaction
belong_trs_v3 interfaces.Transaction
}
func (elm *Action_25_PaymantChannelAndOnchainAtomicExchange) Kind() uint16 {
return 25
}
func (elm *Action_25_PaymantChannelAndOnchainAtomicExchange) Size() uint32 {
return 2 + elm.ExchangeEvidence.Size()
}
// json api
func (elm *Action_25_PaymantChannelAndOnchainAtomicExchange) Describe() map[string]interface{} {
var data = map[string]interface{}{}
return data
}
func (elm *Action_25_PaymantChannelAndOnchainAtomicExchange) Serialize() ([]byte, error) {
var kindByte = make([]byte, 2)
binary.BigEndian.PutUint16(kindByte, elm.Kind())
var bt1, _ = elm.ExchangeEvidence.Serialize()
var buffer bytes.Buffer
buffer.Write(kindByte)
buffer.Write(bt1)
return buffer.Bytes(), nil
}
func (elm *Action_25_PaymantChannelAndOnchainAtomicExchange) Parse(buf []byte, seek uint32) (uint32, error) {
var e error
seek, e = elm.ExchangeEvidence.Parse(buf, seek)
if e != nil {
return 0, e
}
return seek, nil
}
func (elm *Action_25_PaymantChannelAndOnchainAtomicExchange) RequestSignAddresses() []fields.Address {
// Action internal judgment signature
return []fields.Address{}
}
func (act *Action_25_PaymantChannelAndOnchainAtomicExchange) WriteInChainState(state interfaces.ChainStateOperation) error {
var e error
if !sys.TestDebugLocalDevelopmentMark {
return fmt.Errorf("mainnet not yet") // Waiting for review is not enabled yet
}
if act.belong_trs_v3 == nil {
panic("Action belong to transaction not be nil !")
}
// Query whether it is a duplicate submission
swaphx := act.ExchangeEvidence.ChannelTranferProveBodyHashChecker
chaswap, e := state.Chaswap(swaphx)
if e != nil {
return e
}
if chaswap != nil {
// Already exists, cannot submit repeatedly
// Otherwise, it will cause repeated transfers
return fmt.Errorf("ChannelTranferProveBodyHashChecker <%s> is existence.",
swaphx.ToHex())
}
if len(act.ExchangeEvidence.OnchainTransferFromAndMustSignAddresses) < 2 {
return fmt.Errorf("Address lenght error.")
}
// The content related to the channel is not verified during submission, and only the online transfer is operated
e = act.ExchangeEvidence.CheckMustAddressAndSigns()
if e != nil {
return e
}
// Create, save voucher
objsto := stores.Chaswap{
IsBeUsed: fields.CreateBool(false), // 未使用过
AddressCount: act.ExchangeEvidence.AddressCount,
OnchainTransferFromAndMustSignAddresses: act.ExchangeEvidence.OnchainTransferFromAndMustSignAddresses,
}
e = state.ChaswapCreate(swaphx, &objsto)
if e != nil {
return e
}
// transfer accounts
fromAddr := act.ExchangeEvidence.OnchainTransferFromAndMustSignAddresses[0]
toAddr := act.ExchangeEvidence.OnChainTranferToAddress
trsAmt := act.ExchangeEvidence.OnChainTranferAmount
return DoSimpleTransferFromChainState(state, fromAddr, toAddr, trsAmt)
}
func (act *Action_25_PaymantChannelAndOnchainAtomicExchange) WriteinChainState(state interfacev2.ChainStateOperation) error {
var e error
if !sys.TestDebugLocalDevelopmentMark {
return fmt.Errorf("mainnet not yet") // Waiting for review is not enabled yet
}
if act.belong_trs == nil {
panic("Action belong to transaction not be nil !")
}
// Query whether it is a duplicate submission
swaphx := act.ExchangeEvidence.ChannelTranferProveBodyHashChecker
chaswap, e := state.Chaswap(swaphx)
if e != nil {
return e
}
if chaswap != nil {
// Already exists, cannot submit repeatedly
// Otherwise, it will cause repeated transfers
return fmt.Errorf("ChannelTranferProveBodyHashChecker <%s> is existence.",
swaphx.ToHex())
}
if len(act.ExchangeEvidence.OnchainTransferFromAndMustSignAddresses) < 2 {
return fmt.Errorf("Address lenght error.")
}
// The content related to the channel is not verified during submission, and only the online transfer is operated
e = act.ExchangeEvidence.CheckMustAddressAndSigns()
if e != nil {
return e
}
// Create, save voucher
objsto := stores.Chaswap{
IsBeUsed: fields.CreateBool(false), // 未使用过
AddressCount: act.ExchangeEvidence.AddressCount,
OnchainTransferFromAndMustSignAddresses: act.ExchangeEvidence.OnchainTransferFromAndMustSignAddresses,
}
e = state.ChaswapCreate(swaphx, &objsto)
if e != nil {
return e
}
// transfer accounts
fromAddr := act.ExchangeEvidence.OnchainTransferFromAndMustSignAddresses[0]
toAddr := act.ExchangeEvidence.OnChainTranferToAddress
trsAmt := act.ExchangeEvidence.OnChainTranferAmount
return DoSimpleTransferFromChainStateV2(state, fromAddr, toAddr, trsAmt)
}
func (act *Action_25_PaymantChannelAndOnchainAtomicExchange) RecoverChainState(state interfacev2.ChainStateOperation) error {
// Cancel save
swaphx := act.ExchangeEvidence.ChannelTranferProveBodyHashChecker
state.ChaswapDelete(swaphx)
// Transfer return
fromAddr := act.ExchangeEvidence.OnchainTransferFromAndMustSignAddresses[0]
toAddr := act.ExchangeEvidence.OnChainTranferToAddress
trsAmt := act.ExchangeEvidence.OnChainTranferAmount
return DoSimpleTransferFromChainStateV2(state, toAddr, fromAddr, trsAmt)
}
func (elm *Action_25_PaymantChannelAndOnchainAtomicExchange) SetBelongTransaction(t interfacev2.Transaction) {
elm.belong_trs = t
}
func (elm *Action_25_PaymantChannelAndOnchainAtomicExchange) SetBelongTrs(t interfaces.Transaction) {
elm.belong_trs_v3 = t
}
// burning fees // 是否销毁本笔交易的 90% 的交易费用
func (act *Action_25_PaymantChannelAndOnchainAtomicExchange) IsBurning90PersentTxFees() bool {
return false
}