/
asset_tx.go
327 lines (308 loc) · 9.42 KB
/
asset_tx.go
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package transaction
import (
"encoding/json"
"errors"
"github.com/LemoFoundationLtd/lemochain-core/chain/account"
"github.com/LemoFoundationLtd/lemochain-core/chain/types"
"github.com/LemoFoundationLtd/lemochain-core/common"
"github.com/LemoFoundationLtd/lemochain-core/common/log"
"github.com/LemoFoundationLtd/lemochain-core/store"
"math/big"
"sort"
"strings"
)
var (
ErrIssueAssetAmount = errors.New("issue asset amount can't be 0 or nil")
ErrIssueAssetMetaData = errors.New("the length of metaData more than limit")
ErrReplenishAssetAmount = errors.New("replenish asset amount can't be 0 or nil")
ErrAssetIssuer = errors.New("issue asset transaction's sender must the asset issuer")
ErrFrozenAsset = errors.New("can't replenish the frozen assets")
ErrIsReplenishable = errors.New("asset's \"IsReplenishable\" is false")
ErrIsDivisible = errors.New("this \"isDivisible == false\" kind of asset can't be replenished")
ErrNotEqualAssetCode = errors.New("assetCode not equal")
ErrModifyAssetInfo = errors.New("missing required field 'info' for ModifyAssetInfo")
ErrMarshalAssetLength = errors.New("the length of data by marshal asset more than max length")
ErrAssetCategory = errors.New("assert's Category not exist")
ErrModifyAssetTxSender = errors.New("the sender does not have permission to modify this asset")
)
type RunAssetEnv struct {
am *account.Manager
}
func NewRunAssetEnv(am *account.Manager) *RunAssetEnv {
return &RunAssetEnv{
am: am,
}
}
// CreateAssetTx
func (r *RunAssetEnv) CreateAssetTx(sender common.Address, data []byte, txHash common.Hash) error {
var err error
issuerAcc := r.am.GetAccount(sender)
asset := &types.Asset{}
err = json.Unmarshal(data, asset)
if err != nil {
return err
}
// verify
err = asset.VerifyAsset()
if err != nil {
return err
}
asset.Issuer = sender
asset.AssetCode = txHash
asset.TotalSupply = big.NewInt(0) // init 0
newData, err := json.Marshal(asset)
if err != nil {
return err
}
// judge data's length
if len(newData) > types.MaxMarshalAssetLength {
log.Errorf("The length of data by marshal asset more than max length,len(data) = %d ", len(newData))
return ErrMarshalAssetLength
}
var snapshot = r.am.Snapshot()
err = issuerAcc.SetAssetCode(asset.AssetCode, asset)
if err != nil {
r.am.RevertToSnapshot(snapshot)
}
return err
}
// unmarshalIssueAssetData
func unmarshalIssueAssetData(data []byte) (*types.IssueAsset, error) {
issueAsset, err := types.GetIssueAsset(data)
if err != nil {
return nil, err
}
// metaData length limit
if len(issueAsset.MetaData) > types.MaxMetaDataLength {
log.Errorf("The length of metaData more than limit, len(metaData) = %d ", len(issueAsset.MetaData))
return nil, ErrIssueAssetMetaData
}
// amount != nil && amount > 0
if issueAsset.Amount == nil || issueAsset.Amount.Cmp(big.NewInt(0)) <= 0 {
log.Errorf("Issue asset amount must > 0 , currentAmount = %s", issueAsset.Amount.String())
return nil, ErrIssueAssetAmount
}
return issueAsset, nil
}
// IssueAssetTx
func (r *RunAssetEnv) IssueAssetTx(sender, receiver common.Address, txHash common.Hash, data []byte) error {
issueAsset, err := unmarshalIssueAssetData(data)
if err != nil {
return err
}
assetCode := issueAsset.AssetCode
issuerAcc := r.am.GetAccount(sender)
asset, err := issuerAcc.GetAssetCode(assetCode)
if err != nil {
return err
}
// judge sender is issuer
if asset.Issuer != sender {
log.Errorf("Transaction sender is not the asset issuer")
return ErrAssetIssuer
}
// Determine whether asset is frozen
freeze, err := issuerAcc.GetAssetCodeState(assetCode, types.AssetFreeze)
if err == nil && freeze == "true" {
log.Errorf("Can't issue the frozen assets.")
return ErrFrozenAsset
}
recAcc := r.am.GetAccount(receiver)
equity := &types.AssetEquity{}
equity.AssetCode = asset.AssetCode
equity.Equity = issueAsset.Amount
// judge assert type
AssType := asset.Category
if AssType == types.Asset01 { // ERC20
equity.AssetId = asset.AssetCode
} else if AssType == types.Asset02 || AssType == types.Asset03 { // ERC721 or ERC721+20
equity.AssetId = txHash
} else {
log.Errorf("Assert's Category not exist ,Category = %d ", AssType)
return ErrAssetCategory
}
var snapshot = r.am.Snapshot()
newAsset := asset.Clone()
// add totalSupply
var oldTotalSupply *big.Int
var newTotalSupply *big.Int
oldTotalSupply, err = issuerAcc.GetAssetCodeTotalSupply(assetCode)
if err != nil {
return err
}
if !newAsset.IsDivisible {
newTotalSupply = new(big.Int).Add(oldTotalSupply, big.NewInt(1))
} else {
newTotalSupply = new(big.Int).Add(oldTotalSupply, issueAsset.Amount)
}
// set new totalSupply
err = issuerAcc.SetAssetCodeTotalSupply(assetCode, newTotalSupply)
if err != nil {
r.am.RevertToSnapshot(snapshot)
return err
}
// set new asset equity for receiver
err = recAcc.SetEquityState(equity.AssetId, equity)
if err != nil {
r.am.RevertToSnapshot(snapshot)
return err
}
err = recAcc.SetAssetIdState(equity.AssetId, issueAsset.MetaData)
if err != nil {
r.am.RevertToSnapshot(snapshot)
return err
}
return nil
}
// unmarshalReplenishAssetData
func unmarshalReplenishAssetData(data []byte) (*types.ReplenishAsset, error) {
repl, err := types.GetReplenishAsset(data)
if err != nil {
return nil, err
}
addAmount := repl.Amount
// amount > 0
if addAmount == nil || addAmount.Cmp(big.NewInt(0)) <= 0 {
log.Errorf("Replenish asset amount must > 0,currentAmount = %s", addAmount.String())
return nil, ErrReplenishAssetAmount
}
return repl, nil
}
// judgeReplenish 判断满足可增发的条件
func judgeReplenish(issuerAcc types.AccountAccessor, newAssetCode common.Hash) error {
// assert issuer account
asset, err := issuerAcc.GetAssetCode(newAssetCode)
if err != nil {
return err
}
// Determine whether asset is frozen
freeze, err := issuerAcc.GetAssetCodeState(newAssetCode, types.AssetFreeze)
if err == nil && freeze == "true" {
return ErrFrozenAsset
}
// judge IsReplenishable
if !asset.IsReplenishable {
return ErrIsReplenishable
}
// erc721 asset can't be replenished
if !asset.IsDivisible {
return ErrIsDivisible
}
return nil
}
// ReplenishAssetTx
func (r *RunAssetEnv) ReplenishAssetTx(sender, receiver common.Address, data []byte) error {
repl, err := unmarshalReplenishAssetData(data)
if err != nil {
return err
}
newAssetCode := repl.AssetCode
newAssetId := repl.AssetId
addAmount := repl.Amount
// assert issuer account
issuerAcc := r.am.GetAccount(sender)
err = judgeReplenish(issuerAcc, newAssetCode)
if err != nil {
return err
}
// receiver account
recAcc := r.am.GetAccount(receiver)
equity, err := recAcc.GetEquityState(newAssetId)
if err != nil && err != store.ErrNotExist {
return err
}
if err == store.ErrNotExist {
equity = &types.AssetEquity{
AssetCode: newAssetCode,
AssetId: newAssetId,
Equity: big.NewInt(0),
}
}
if newAssetCode != equity.AssetCode {
log.Errorf("AssetCode not equal: newAssetCode = %s,originalAssetCode = %s. ", newAssetCode.String(), equity.AssetCode.String())
return ErrNotEqualAssetCode
}
var snapshot = r.am.Snapshot()
// add amount
newEquity := equity.Clone()
newEquity.Equity = new(big.Int).Add(newEquity.Equity, addAmount)
err = recAcc.SetEquityState(newEquity.AssetId, newEquity)
if err != nil {
r.am.RevertToSnapshot(snapshot)
return err
}
// add asset totalSupply
var oldTotalSupply *big.Int
var newTotalSupply *big.Int
oldTotalSupply, err = issuerAcc.GetAssetCodeTotalSupply(newAssetCode)
if err != nil {
return err
}
newTotalSupply = new(big.Int).Add(oldTotalSupply, addAmount)
err = issuerAcc.SetAssetCodeTotalSupply(newAssetCode, newTotalSupply)
if err != nil {
r.am.RevertToSnapshot(snapshot)
return err
}
return nil
}
func unmarshalModifyAssetData(data []byte) (*types.ModifyAssetInfo, error) {
modifyInfo, err := types.GetModifyAssetInfo(data)
if err != nil {
return nil, err
}
info := modifyInfo.UpdateProfile
if info == nil || len(info) == 0 {
return nil, ErrModifyAssetInfo
}
return modifyInfo, nil
}
// ModifyAssetProfileTx
func (r *RunAssetEnv) ModifyAssetProfileTx(sender common.Address, data []byte) error {
modifyInfo, err := unmarshalModifyAssetData(data)
if err != nil {
return err
}
info := modifyInfo.UpdateProfile
acc := r.am.GetAccount(sender)
// determine whether there is modification permission
oldAsset, err := acc.GetAssetCode(modifyInfo.AssetCode)
if err != nil {
return err
}
if oldAsset.Issuer != sender {
log.Errorf("SenderAddress:%s,assetIssuer:%s", sender.String(), oldAsset.Issuer.String())
return ErrModifyAssetTxSender
}
var snapshot = r.am.Snapshot()
infoSlice := make([]string, 0, len(info))
for k, _ := range info {
infoSlice = append(infoSlice, strings.ToLower(k))
}
sort.Strings(infoSlice)
for i := 0; i < len(infoSlice); i++ {
err = acc.SetAssetCodeState(modifyInfo.AssetCode, infoSlice[i], info[infoSlice[i]])
if err != nil {
r.am.RevertToSnapshot(snapshot)
return err
}
}
// judge profile size
newAsset, err := acc.GetAssetCode(modifyInfo.AssetCode)
if err != nil {
r.am.RevertToSnapshot(snapshot)
return err
}
newData, err := json.Marshal(newAsset)
if err != nil {
r.am.RevertToSnapshot(snapshot)
return err
}
// judge data's length
if len(newData) > types.MaxMarshalAssetLength {
log.Errorf("The length of marshaling asset data exceed limit, len(data) = %d max = %d", len(newData), types.MaxMarshalAssetLength)
r.am.RevertToSnapshot(snapshot)
return ErrMarshalAssetLength
}
return nil
}