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ledger_transaction.go
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ledger_transaction.go
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package ingest
import (
"fmt"
"github.com/pownieh/stellar_go/support/errors"
"github.com/pownieh/stellar_go/xdr"
)
// LedgerTransaction represents the data for a single transaction within a ledger.
type LedgerTransaction struct {
Index uint32
Envelope xdr.TransactionEnvelope
Result xdr.TransactionResultPair
// FeeChanges and UnsafeMeta are low level values, do not use them directly unless
// you know what you are doing.
// Use LedgerTransaction.GetChanges() for higher level access to ledger
// entry changes.
FeeChanges xdr.LedgerEntryChanges
UnsafeMeta xdr.TransactionMeta
LedgerVersion uint32
}
func (t *LedgerTransaction) txInternalError() bool {
return t.Result.Result.Result.Code == xdr.TransactionResultCodeTxInternalError
}
// GetFeeChanges returns a developer friendly representation of LedgerEntryChanges
// connected to fees.
func (t *LedgerTransaction) GetFeeChanges() []Change {
return GetChangesFromLedgerEntryChanges(t.FeeChanges)
}
// GetChanges returns a developer friendly representation of LedgerEntryChanges.
// It contains transaction changes and operation changes in that order. If the
// transaction failed with TxInternalError, operations and txChangesAfter are
// omitted. It doesn't support legacy TransactionMeta.V=0.
func (t *LedgerTransaction) GetChanges() ([]Change, error) {
var changes []Change
// Transaction meta
switch t.UnsafeMeta.V {
case 0:
return changes, errors.New("TransactionMeta.V=0 not supported")
case 1:
v1Meta := t.UnsafeMeta.MustV1()
txChanges := GetChangesFromLedgerEntryChanges(v1Meta.TxChanges)
changes = append(changes, txChanges...)
// Ignore operations meta if txInternalError https://github.com/pownieh/stellar_go/issues/2111
if t.txInternalError() && t.LedgerVersion <= 12 {
return changes, nil
}
for _, operationMeta := range v1Meta.Operations {
opChanges := GetChangesFromLedgerEntryChanges(
operationMeta.Changes,
)
changes = append(changes, opChanges...)
}
case 2, 3:
var (
beforeChanges, afterChanges xdr.LedgerEntryChanges
operationMeta []xdr.OperationMeta
)
switch t.UnsafeMeta.V {
case 2:
v2Meta := t.UnsafeMeta.MustV2()
beforeChanges = v2Meta.TxChangesBefore
afterChanges = v2Meta.TxChangesAfter
operationMeta = v2Meta.Operations
case 3:
v3Meta := t.UnsafeMeta.MustV3()
beforeChanges = v3Meta.TxChangesBefore
afterChanges = v3Meta.TxChangesAfter
operationMeta = v3Meta.Operations
default:
panic("Invalid meta version, expected 2 or 3")
}
txChangesBefore := GetChangesFromLedgerEntryChanges(beforeChanges)
changes = append(changes, txChangesBefore...)
// Ignore operations meta and txChangesAfter if txInternalError
// https://github.com/pownieh/stellar_go/issues/2111
if t.txInternalError() && t.LedgerVersion <= 12 {
return changes, nil
}
for _, operationMeta := range operationMeta {
opChanges := GetChangesFromLedgerEntryChanges(
operationMeta.Changes,
)
changes = append(changes, opChanges...)
}
txChangesAfter := GetChangesFromLedgerEntryChanges(afterChanges)
changes = append(changes, txChangesAfter...)
default:
return changes, errors.New("Unsupported TransactionMeta version")
}
return changes, nil
}
// GetOperation returns an operation by index.
func (t *LedgerTransaction) GetOperation(index uint32) (xdr.Operation, bool) {
ops := t.Envelope.Operations()
if int(index) >= len(ops) {
return xdr.Operation{}, false
}
return ops[index], true
}
// GetOperationChanges returns a developer friendly representation of LedgerEntryChanges.
// It contains only operation changes.
func (t *LedgerTransaction) GetOperationChanges(operationIndex uint32) ([]Change, error) {
changes := []Change{}
if t.UnsafeMeta.V == 0 {
return changes, errors.New("TransactionMeta.V=0 not supported")
}
// Ignore operations meta if txInternalError https://github.com/pownieh/stellar_go/issues/2111
if t.txInternalError() && t.LedgerVersion <= 12 {
return changes, nil
}
var operationMeta []xdr.OperationMeta
switch t.UnsafeMeta.V {
case 1:
operationMeta = t.UnsafeMeta.MustV1().Operations
case 2:
operationMeta = t.UnsafeMeta.MustV2().Operations
case 3:
operationMeta = t.UnsafeMeta.MustV3().Operations
default:
return changes, errors.New("Unsupported TransactionMeta version")
}
return operationChanges(operationMeta, operationIndex), nil
}
func operationChanges(ops []xdr.OperationMeta, index uint32) []Change {
if int(index) >= len(ops) {
return []Change{}
}
operationMeta := ops[index]
return GetChangesFromLedgerEntryChanges(
operationMeta.Changes,
)
}
// GetDiagnosticEvents returns all contract events emitted by a given operation.
func (t *LedgerTransaction) GetDiagnosticEvents() ([]xdr.DiagnosticEvent, error) {
switch t.UnsafeMeta.V {
case 1:
return nil, nil
case 2:
return nil, nil
case 3:
var diagnosticEvents []xdr.DiagnosticEvent
var contractEvents []xdr.ContractEvent
if sorobanMeta := t.UnsafeMeta.MustV3().SorobanMeta; sorobanMeta != nil {
diagnosticEvents = sorobanMeta.DiagnosticEvents
if len(diagnosticEvents) > 0 {
// all contract events and diag events for a single operation(by it's index in the tx) were available
// in tx meta's DiagnosticEvents, no need to look anywhere else for events
return diagnosticEvents, nil
}
contractEvents = sorobanMeta.Events
if len(contractEvents) == 0 {
// no events were present in this tx meta
return nil, nil
}
}
// tx meta only provided contract events, no diagnostic events, we convert the contract
// event to a diagnostic event, to fit the response interface.
convertedDiagnosticEvents := make([]xdr.DiagnosticEvent, len(contractEvents))
for i, event := range contractEvents {
convertedDiagnosticEvents[i] = xdr.DiagnosticEvent{
InSuccessfulContractCall: true,
Event: event,
}
}
return convertedDiagnosticEvents, nil
default:
return nil, fmt.Errorf("unsupported TransactionMeta version: %v", t.UnsafeMeta.V)
}
}