var (
defaultTxTTL = 5 * time.Minute
defaultBaseRate = float64(100000)
+ flexibleGas = int64(1800)
)
func (a *API) actionDecoder(action string) (func([]byte) (txbuilder.Action, error), bool) {
- var decoder func([]byte) (txbuilder.Action, error)
- switch action {
- case "control_address":
- decoder = txbuilder.DecodeControlAddressAction
- case "control_program":
- decoder = txbuilder.DecodeControlProgramAction
- case "control_receiver":
- decoder = txbuilder.DecodeControlReceiverAction
- case "issue":
- decoder = a.wallet.AssetReg.DecodeIssueAction
- case "retire":
- decoder = txbuilder.DecodeRetireAction
- case "spend_account":
- decoder = a.wallet.AccountMgr.DecodeSpendAction
- case "spend_account_unspent_output":
- decoder = a.wallet.AccountMgr.DecodeSpendUTXOAction
- default:
- return nil, false
- }
- return decoder, true
-}
-
-func onlyHaveSpendActions(req *BuildRequest) bool {
+ decoders := map[string]func([]byte) (txbuilder.Action, error){
+ "control_address": txbuilder.DecodeControlAddressAction,
+ "control_program": txbuilder.DecodeControlProgramAction,
+ "issue": a.wallet.AssetReg.DecodeIssueAction,
+ "retire": txbuilder.DecodeRetireAction,
+ "spend_account": a.wallet.AccountMgr.DecodeSpendAction,
+ "spend_account_unspent_output": a.wallet.AccountMgr.DecodeSpendUTXOAction,
+ }
+ decoder, ok := decoders[action]
+ return decoder, ok
+}
+
+func onlyHaveInputActions(req *BuildRequest) (bool, error) {
count := 0
- for _, m := range req.Actions {
- if actionType := m["type"].(string); strings.HasPrefix(actionType, "spend") {
+ for i, act := range req.Actions {
+ actionType, ok := act["type"].(string)
+ if !ok {
+ return false, errors.WithDetailf(ErrBadActionType, "no action type provided on action %d", i)
+ }
+
+ if strings.HasPrefix(actionType, "spend") || actionType == "issue" {
count++
}
}
- return count == len(req.Actions)
+ return count == len(req.Actions), nil
}
func (a *API) buildSingle(ctx context.Context, req *BuildRequest) (*txbuilder.Template, error) {
- if err := a.completeMissingIds(ctx, req); err != nil {
+ if err := a.checkRequestValidity(ctx, req); err != nil {
+ return nil, err
+ }
+ actions, err := a.mergeSpendActions(req)
+ if err != nil {
return nil, err
}
- if onlyHaveSpendActions(req) {
- return nil, errors.New("transaction only contain spend actions, didn't have output actions")
+ maxTime := time.Now().Add(req.TTL.Duration)
+ tpl, err := txbuilder.Build(ctx, req.Tx, actions, maxTime, req.TimeRange)
+ if errors.Root(err) == txbuilder.ErrAction {
+ // append each of the inner errors contained in the data.
+ var Errs string
+ var rootErr error
+ for i, innerErr := range errors.Data(err)["actions"].([]error) {
+ if i == 0 {
+ rootErr = errors.Root(innerErr)
+ }
+ Errs = Errs + innerErr.Error()
+ }
+ err = errors.WithDetail(rootErr, Errs)
+ }
+ if err != nil {
+ return nil, err
}
- spendActions := []txbuilder.Action{}
+ // ensure null is never returned for signing instructions
+ if tpl.SigningInstructions == nil {
+ tpl.SigningInstructions = []*txbuilder.SigningInstruction{}
+ }
+ return tpl, nil
+}
+
+// POST /build-transaction
+func (a *API) build(ctx context.Context, buildReqs *BuildRequest) Response {
+ subctx := reqid.NewSubContext(ctx, reqid.New())
+ tmpl, err := a.buildSingle(subctx, buildReqs)
+ if err != nil {
+ return NewErrorResponse(err)
+ }
+
+ return NewSuccessResponse(tmpl)
+}
+func (a *API) checkRequestValidity(ctx context.Context, req *BuildRequest) error {
+ if err := a.completeMissingIDs(ctx, req); err != nil {
+ return err
+ }
+
+ if req.TTL.Duration == 0 {
+ req.TTL.Duration = defaultTxTTL
+ }
+
+ if ok, err := onlyHaveInputActions(req); err != nil {
+ return err
+ } else if ok {
+ return errors.WithDetail(ErrBadActionConstruction, "transaction contains only input actions and no output actions")
+ }
+ return nil
+}
+
+func (a *API) mergeSpendActions(req *BuildRequest) ([]txbuilder.Action, error) {
actions := make([]txbuilder.Action, 0, len(req.Actions))
for i, act := range req.Actions {
typ, ok := act["type"].(string)
if !ok {
- return nil, errors.WithDetailf(errBadActionType, "no action type provided on action %d", i)
+ return nil, errors.WithDetailf(ErrBadActionType, "no action type provided on action %d", i)
}
decoder, ok := a.actionDecoder(typ)
if !ok {
- return nil, errors.WithDetailf(errBadActionType, "unknown action type %q on action %d", typ, i)
+ return nil, errors.WithDetailf(ErrBadActionType, "unknown action type %q on action %d", typ, i)
}
// Remarshal to JSON, the action may have been modified when we
}
action, err := decoder(b)
if err != nil {
- return nil, errors.WithDetailf(errBadAction, "%s on action %d", err.Error(), i)
- }
-
- if typ == "spend_account" {
- spendActions = append(spendActions, action)
- } else {
- actions = append(actions, action)
+ return nil, errors.WithDetailf(ErrBadAction, "%s on action %d", err.Error(), i)
}
+ actions = append(actions, action)
}
- actions = append(account.MergeSpendAction(spendActions), actions...)
+ actions = account.MergeSpendAction(actions)
+ return actions, nil
+}
- ttl := req.TTL.Duration
- if ttl == 0 {
- ttl = defaultTxTTL
+func (a *API) buildTxs(ctx context.Context, req *BuildRequest) ([]*txbuilder.Template, error) {
+ if err := a.checkRequestValidity(ctx, req); err != nil {
+ return nil, err
+ }
+ actions, err := a.mergeSpendActions(req)
+ if err != nil {
+ return nil, err
}
- maxTime := time.Now().Add(ttl)
- tpl, err := txbuilder.Build(ctx, req.Tx, actions, maxTime, req.TimeRange)
- if errors.Root(err) == txbuilder.ErrAction {
- // append each of the inner errors contained in the data.
- var Errs string
- for _, innerErr := range errors.Data(err)["actions"].([]error) {
- Errs = Errs + "<" + innerErr.Error() + ">"
+ builder := txbuilder.NewBuilder(time.Now().Add(req.TTL.Duration))
+ tpls := []*txbuilder.Template{}
+ for _, action := range actions {
+ if action.ActionType() == "spend_account" {
+ tpls, err = account.SpendAccountChain(ctx, builder, action)
+ } else {
+ err = action.Build(ctx, builder)
+ }
+
+ if err != nil {
+ builder.Rollback()
+ return nil, err
}
- err = errors.New(err.Error() + "-" + Errs)
}
+
+ tpl, _, err := builder.Build()
if err != nil {
+ builder.Rollback()
return nil, err
}
- // ensure null is never returned for signing instructions
- if tpl.SigningInstructions == nil {
- tpl.SigningInstructions = []*txbuilder.SigningInstruction{}
- }
- return tpl, nil
+ tpls = append(tpls, tpl)
+ return tpls, nil
}
-// POST /build-transaction
-func (a *API) build(ctx context.Context, buildReqs *BuildRequest) Response {
+// POST /build-chain-transactions
+func (a *API) buildChainTxs(ctx context.Context, buildReqs *BuildRequest) Response {
subctx := reqid.NewSubContext(ctx, reqid.New())
-
- tmpl, err := a.buildSingle(subctx, buildReqs)
+ tmpls, err := a.buildTxs(subctx, buildReqs)
if err != nil {
return NewErrorResponse(err)
}
-
- return NewSuccessResponse(tmpl)
+ return NewSuccessResponse(tmpls)
}
type submitTxResp struct {
return NewSuccessResponse(&submitTxResp{TxID: &ins.Tx.ID})
}
+type submitTxsResp struct {
+ TxID []*bc.Hash `json:"tx_id"`
+}
+
+// POST /submit-transactions
+func (a *API) submitTxs(ctx context.Context, ins struct {
+ Tx []types.Tx `json:"raw_transactions"`
+}) Response {
+ txHashs := []*bc.Hash{}
+ for i := range ins.Tx {
+ if err := txbuilder.FinalizeTx(ctx, a.chain, &ins.Tx[i]); err != nil {
+ return NewErrorResponse(err)
+ }
+ log.WithField("tx_id", ins.Tx[i].ID.String()).Info("submit single tx")
+ txHashs = append(txHashs, &ins.Tx[i].ID)
+ }
+ return NewSuccessResponse(&submitTxsResp{TxID: txHashs})
+}
+
// EstimateTxGasResp estimate transaction consumed gas
type EstimateTxGasResp struct {
TotalNeu int64 `json:"total_neu"`
baseTxSize := int64(len(data))
// extra tx size for sign witness parts
- baseWitnessSize := int64(300)
- lenSignInst := int64(len(template.SigningInstructions))
- signSize := baseWitnessSize * lenSignInst
+ signSize := estimateSignSize(template.SigningInstructions)
// total gas for tx storage
totalTxSizeGas, ok := checked.MulInt64(baseTxSize+signSize, consensus.StorageGasRate)
totalP2WPKHGas := int64(0)
totalP2WSHGas := int64(0)
baseP2WPKHGas := int64(1419)
- baseP2WSHGas := int64(2499)
+ // flexible Gas is used for handle need extra utxo situation
- for _, inpID := range template.Transaction.Tx.InputIDs {
+ for pos, inpID := range template.Transaction.Tx.InputIDs {
sp, err := template.Transaction.Spend(inpID)
if err != nil {
continue
if segwit.IsP2WPKHScript(resOut.ControlProgram.Code) {
totalP2WPKHGas += baseP2WPKHGas
} else if segwit.IsP2WSHScript(resOut.ControlProgram.Code) {
- totalP2WSHGas += baseP2WSHGas
+ sigInst := template.SigningInstructions[pos]
+ totalP2WSHGas += estimateP2WSHGas(sigInst)
}
}
// total estimate gas
- totalGas := totalTxSizeGas + totalP2WPKHGas + totalP2WSHGas
+ totalGas := totalTxSizeGas + totalP2WPKHGas + totalP2WSHGas + flexibleGas
// rounding totalNeu with base rate 100000
totalNeu := float64(totalGas*consensus.VMGasRate) / defaultBaseRate
roundingNeu := math.Ceil(totalNeu)
estimateNeu := int64(roundingNeu) * int64(defaultBaseRate)
+ // TODO add priority
+
return &EstimateTxGasResp{
TotalNeu: estimateNeu,
StorageNeu: totalTxSizeGas * consensus.VMGasRate,
}, nil
}
+// estimate p2wsh gas.
+// OP_CHECKMULTISIG consume (984 * a - 72 * b - 63) gas,
+// where a represent the num of public keys, and b represent the num of quorum.
+func estimateP2WSHGas(sigInst *txbuilder.SigningInstruction) int64 {
+ P2WSHGas := int64(0)
+ baseP2WSHGas := int64(738)
+
+ for _, witness := range sigInst.WitnessComponents {
+ switch t := witness.(type) {
+ case *txbuilder.SignatureWitness:
+ P2WSHGas += baseP2WSHGas + (984*int64(len(t.Keys)) - 72*int64(t.Quorum) - 63)
+ case *txbuilder.RawTxSigWitness:
+ P2WSHGas += baseP2WSHGas + (984*int64(len(t.Keys)) - 72*int64(t.Quorum) - 63)
+ }
+ }
+ return P2WSHGas
+}
+
+// estimate signature part size.
+// if need multi-sign, calculate the size according to the length of keys.
+func estimateSignSize(signingInstructions []*txbuilder.SigningInstruction) int64 {
+ signSize := int64(0)
+ baseWitnessSize := int64(300)
+
+ for _, sigInst := range signingInstructions {
+ for _, witness := range sigInst.WitnessComponents {
+ switch t := witness.(type) {
+ case *txbuilder.SignatureWitness:
+ signSize += int64(t.Quorum) * baseWitnessSize
+ case *txbuilder.RawTxSigWitness:
+ signSize += int64(t.Quorum) * baseWitnessSize
+ }
+ }
+ }
+ return signSize
+}
+
// POST /estimate-transaction-gas
func (a *API) estimateTxGas(ctx context.Context, in struct {
TxTemplate txbuilder.Template `json:"transaction_template"`
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