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transaction.go
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transaction.go
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package ergo
/*
#include "ergo.h"
*/
import "C"
import (
"iter"
"runtime"
"unsafe"
)
// TxId represents transaction id
type TxId interface {
// String returns TxId as string
String() (string, error)
// Equals checks if provided TxId is same
Equals(txId TxId) bool
pointer() C.TxIdPtr
}
type txId struct {
p C.TxIdPtr
}
func newTxId(t *txId) TxId {
runtime.SetFinalizer(t, finalizeTxId)
return t
}
// NewTxId creates TxId from hex-encoded string
func NewTxId(s string) (TxId, error) {
txIdStr := C.CString(s)
defer C.free(unsafe.Pointer(txIdStr))
var p C.TxIdPtr
errPtr := C.ergo_lib_tx_id_from_str(txIdStr, &p)
err := newError(errPtr)
if err.isError() {
return nil, err.error()
}
t := &txId{p}
return newTxId(t), nil
}
func (t *txId) String() (string, error) {
var outTxIdStr *C.char
errPtr := C.ergo_lib_tx_id_to_str(t.p, &outTxIdStr)
err := newError(errPtr)
if err.isError() {
return "", err.error()
}
defer C.ergo_lib_delete_string(outTxIdStr)
return C.GoString(outTxIdStr), nil
}
func (t *txId) Equals(txId TxId) bool {
res := C.ergo_lib_tx_id_eq(t.p, txId.pointer())
return bool(res)
}
func (t *txId) pointer() C.TxIdPtr {
return t.p
}
func finalizeTxId(t *txId) {
C.ergo_lib_tx_id_delete(t.p)
}
// CommitmentHint is a family of hints which are about a correspondence between a public image of a secret image and prover's commitment
// to randomness ("a" in a sigma protocol).
type CommitmentHint interface {
pointer() C.CommitmentHintPtr
}
type commitmentHint struct {
p C.CommitmentHintPtr
}
func newCommitmentHint(c *commitmentHint) CommitmentHint {
runtime.SetFinalizer(c, finalizeCommitmentHint)
return c
}
func (c *commitmentHint) pointer() C.CommitmentHintPtr {
return c.p
}
func finalizeCommitmentHint(c *commitmentHint) {
C.ergo_lib_commitment_hint_delete(c.p)
}
// HintsBag is a collection of CommitmentHint to be used by a prover
type HintsBag interface {
// Add adds CommitmentHint to the bag
Add(hint CommitmentHint)
// Len returns the length of the HintsBag
Len() int
// Get returns the CommitmentHint at the provided index if it exists
Get(index int) (CommitmentHint, error)
// All returns an iterator over all CommitmentHint inside the collection
All() iter.Seq2[int, CommitmentHint]
pointer() C.HintsBagPtr
}
type hintsBag struct {
p C.HintsBagPtr
}
func newHintsBag(h *hintsBag) HintsBag {
runtime.SetFinalizer(h, finalizeHintsBag)
return h
}
// NewHintsBag creates an empty HintsBag
func NewHintsBag() HintsBag {
var p C.HintsBagPtr
C.ergo_lib_hints_bag_empty(&p)
h := &hintsBag{p: p}
return newHintsBag(h)
}
func (h *hintsBag) Add(hint CommitmentHint) {
C.ergo_lib_hints_bag_add_commitment(h.p, hint.pointer())
}
func (h *hintsBag) Len() int {
res := C.ergo_lib_hints_bag_len(h.p)
return int(res)
}
func (h *hintsBag) Get(index int) (CommitmentHint, error) {
var p C.CommitmentHintPtr
res := C.ergo_lib_hints_bag_get(h.p, C.uintptr_t(index), &p)
err := newError(res.error)
if err.isError() {
return nil, err.error()
}
if res.is_some {
c := &commitmentHint{p: p}
return newCommitmentHint(c), nil
}
return nil, nil
}
func (h *hintsBag) All() iter.Seq2[int, CommitmentHint] {
return func(yield func(int, CommitmentHint) bool) {
for i := 0; i < h.Len(); i++ {
tk, err := h.Get(i)
if err != nil {
return
}
if !yield(i, tk) {
return
}
}
}
}
func (h *hintsBag) pointer() C.HintsBagPtr {
return h.p
}
func finalizeHintsBag(h *hintsBag) {
C.ergo_lib_hints_bag_delete(h.p)
}
type TransactionHintsBag interface {
// AddHintsForInput adds hints for input
AddHintsForInput(index uint32, hintsBag HintsBag)
// AllHintsForInput gets HintsBag corresponding to input index
AllHintsForInput(index uint32) HintsBag
pointer() C.TransactionHintsBagPtr
}
type transactionHintsBag struct {
p C.TransactionHintsBagPtr
}
func newTransactionHintsBag(t *transactionHintsBag) TransactionHintsBag {
runtime.SetFinalizer(t, finalizeTransactionHintsBag)
return t
}
// NewTransactionHintsBag creates empty TransactionHintsBag
func NewTransactionHintsBag() TransactionHintsBag {
var p C.TransactionHintsBagPtr
C.ergo_lib_transaction_hints_bag_empty(&p)
t := &transactionHintsBag{p: p}
return newTransactionHintsBag(t)
}
func (t *transactionHintsBag) AddHintsForInput(index uint32, hintsBag HintsBag) {
C.ergo_lib_transaction_hints_bag_add_hints_for_input(t.p, C.uintptr_t(index), hintsBag.pointer())
}
func (t *transactionHintsBag) AllHintsForInput(index uint32) HintsBag {
var p C.HintsBagPtr
C.ergo_lib_transaction_hints_bag_all_hints_for_input(t.p, C.uintptr_t(index), &p)
h := &hintsBag{p: p}
return newHintsBag(h)
}
func (t *transactionHintsBag) pointer() C.TransactionHintsBagPtr {
return t.p
}
func finalizeTransactionHintsBag(t *transactionHintsBag) {
C.ergo_lib_transaction_hints_bag_delete(t.p)
}
// ExtractHintsFromSignedTransaction extracts hints from signed transaction
func ExtractHintsFromSignedTransaction(
transaction Transaction,
stateContext StateContext,
boxesToSpend Boxes,
dataBoxes Boxes,
realPropositions Propositions,
simulatedPropositions Propositions) (TransactionHintsBag, error) {
var p C.TransactionHintsBagPtr
errPtr := C.ergo_lib_transaction_extract_hints(
transaction.pointer(),
stateContext.pointer(),
boxesToSpend.pointer(),
dataBoxes.pointer(),
realPropositions.pointer(),
simulatedPropositions.pointer(),
&p)
err := newError(errPtr)
if err.isError() {
return nil, err.error()
}
th := &transactionHintsBag{p: p}
return newTransactionHintsBag(th), nil
}
// UnsignedTransaction represents an unsigned transaction (inputs without proofs)
type UnsignedTransaction interface {
// TxId returns TxId for this UnsignedTransaction
TxId() TxId
// UnsignedInputs returns UnsignedInputs for this UnsignedTransaction
UnsignedInputs() UnsignedInputs
// DataInputs returns DataInputs for this UnsignedTransaction
DataInputs() DataInputs
// OutputCandidates returns BoxCandidates for this UnsignedTransaction
OutputCandidates() BoxCandidates
// Json returns json representation of UnsignedTransaction as string (compatible with Ergo Node/Explorer API, numbers are encoded as numbers)
Json() (string, error)
// JsonEIP12 returns json representation of UnsignedTransaction as string according to EIP-12 https://github.com/ergoplatform/eips/pull/23
JsonEIP12() (string, error)
pointer() C.UnsignedTransactionPtr
}
type unsignedTransaction struct {
p C.UnsignedTransactionPtr
}
func newUnsignedTransaction(u *unsignedTransaction) UnsignedTransaction {
runtime.SetFinalizer(u, finalizeUnsignedTransaction)
return u
}
// NewUnsignedTransactionFromJson parse UnsignedTransaction from JSON. Supports Ergo Node/Explorer API and box values and token amount encoded as strings.
func NewUnsignedTransactionFromJson(json string) (UnsignedTransaction, error) {
unsTxJsonStr := C.CString(json)
defer C.free(unsafe.Pointer(unsTxJsonStr))
var p C.UnsignedTransactionPtr
errPtr := C.ergo_lib_unsigned_tx_from_json(unsTxJsonStr, &p)
err := newError(errPtr)
if err.isError() {
return nil, err.error()
}
ut := &unsignedTransaction{p: p}
return newUnsignedTransaction(ut), nil
}
func (u *unsignedTransaction) TxId() TxId {
var p C.TxIdPtr
C.ergo_lib_unsigned_tx_id(u.p, &p)
ti := &txId{p: p}
return newTxId(ti)
}
func (u *unsignedTransaction) UnsignedInputs() UnsignedInputs {
var p C.UnsignedInputsPtr
C.ergo_lib_unsigned_tx_inputs(u.p, &p)
ui := &unsignedInputs{p: p}
return newUnsignedInputs(ui)
}
func (u *unsignedTransaction) DataInputs() DataInputs {
var p C.DataInputsPtr
C.ergo_lib_unsigned_tx_data_inputs(u.p, &p)
di := &dataInputs{p: p}
return newDataInputs(di)
}
func (u *unsignedTransaction) OutputCandidates() BoxCandidates {
var p C.ErgoBoxCandidatesPtr
C.ergo_lib_unsigned_tx_output_candidates(u.p, &p)
bc := &boxCandidates{p: p}
return newBoxCandidates(bc)
}
func (u *unsignedTransaction) Json() (string, error) {
var outStr *C.char
errPtr := C.ergo_lib_unsigned_tx_to_json(u.p, &outStr)
defer C.ergo_lib_delete_string(outStr)
err := newError(errPtr)
if err.isError() {
return "", err.error()
}
result := C.GoString(outStr)
return result, nil
}
func (u *unsignedTransaction) JsonEIP12() (string, error) {
var outStr *C.char
errPtr := C.ergo_lib_unsigned_tx_to_json_eip12(u.p, &outStr)
defer C.ergo_lib_delete_string(outStr)
err := newError(errPtr)
if err.isError() {
return "", err.error()
}
result := C.GoString(outStr)
return result, nil
}
func (u *unsignedTransaction) pointer() C.UnsignedTransactionPtr {
return u.p
}
func finalizeUnsignedTransaction(u *unsignedTransaction) {
C.ergo_lib_unsigned_tx_delete(u.p)
}
// Transaction is an atomic state transition operation. It destroys Boxes from the state
// and creates new ones. If transaction is spending boxes protected by some non-trivial scripts,
// its inputs should also contain proof of spending correctness - context extension (user-defined
// key-value map) and data inputs (links to existing boxes in the state) that may be used during
// script reduction to crypto, signatures that satisfies the remaining cryptographic protection
// of the script.
// Transactions are not encrypted, so it is possible to browse and view every transaction ever
// collected into a block.
type Transaction interface {
// TxId returns TxId for this Transaction
TxId() TxId
// Inputs returns Inputs for this Transaction
Inputs() Inputs
// DataInputs returns DataInputs for this Transaction
DataInputs() DataInputs
// OutputCandidates returns BoxCandidates for this Transaction
OutputCandidates() BoxCandidates
// Outputs returns Boxes for this Transaction
Outputs() Boxes
// Json returns json representation of Transaction as string (compatible with Ergo Node/Explorer API, numbers are encoded as numbers)
Json() (string, error)
// JsonEIP12 returns json representation of Transaction as string according to EIP-12 https://github.com/ergoplatform/eips/pull/23
JsonEIP12() (string, error)
// Validate validates the current Transaction
Validate(stateContext StateContext, boxesToSpent Boxes, dataBoxes Boxes) error
pointer() C.TransactionPtr
}
type transaction struct {
p C.TransactionPtr
}
func newTransaction(t *transaction) Transaction {
runtime.SetFinalizer(t, finalizeTransaction)
return t
}
// NewTransaction creates Transaction from UnsignedTransaction and an array of proofs in the same order as
// UnsignedTransaction inputs with empty proof indicated with empty ByteArray
func NewTransaction(unsignedTx UnsignedTransaction, proofs ByteArrays) (Transaction, error) {
var p C.TransactionPtr
errPtr := C.ergo_lib_tx_from_unsigned_tx(unsignedTx.pointer(), proofs.pointer(), &p)
err := newError(errPtr)
if err.isError() {
return nil, err.error()
}
t := &transaction{p: p}
return newTransaction(t), nil
}
// NewTransactionFromJson parse Transaction from JSON. Supports Ergo Node/Explorer API and box values and token amount encoded as strings.
func NewTransactionFromJson(json string) (Transaction, error) {
txJsonStr := C.CString(json)
defer C.free(unsafe.Pointer(txJsonStr))
var p C.TransactionPtr
errPtr := C.ergo_lib_tx_from_json(txJsonStr, &p)
err := newError(errPtr)
if err.isError() {
return nil, err.error()
}
t := &transaction{p: p}
return newTransaction(t), nil
}
func (t *transaction) TxId() TxId {
var p C.TxIdPtr
C.ergo_lib_tx_id(t.p, &p)
ti := &txId{p: p}
return newTxId(ti)
}
func (t *transaction) Inputs() Inputs {
var p C.InputsPtr
C.ergo_lib_tx_inputs(t.p, &p)
i := &inputs{p: p}
return newInputs(i)
}
func (t *transaction) DataInputs() DataInputs {
var p C.DataInputsPtr
C.ergo_lib_tx_data_inputs(t.p, &p)
di := &dataInputs{p: p}
return newDataInputs(di)
}
func (t *transaction) OutputCandidates() BoxCandidates {
var p C.ErgoBoxCandidatesPtr
C.ergo_lib_tx_output_candidates(t.p, &p)
bc := &boxCandidates{p: p}
return newBoxCandidates(bc)
}
func (t *transaction) Outputs() Boxes {
var p C.ErgoBoxesPtr
C.ergo_lib_tx_outputs(t.p, &p)
b := &boxes{p: p}
return newBoxes(b)
}
func (t *transaction) Json() (string, error) {
var outStr *C.char
errPtr := C.ergo_lib_tx_to_json(t.p, &outStr)
defer C.ergo_lib_delete_string(outStr)
err := newError(errPtr)
if err.isError() {
return "", err.error()
}
result := C.GoString(outStr)
return result, nil
}
func (t *transaction) JsonEIP12() (string, error) {
var outStr *C.char
errPtr := C.ergo_lib_tx_to_json_eip12(t.p, &outStr)
defer C.ergo_lib_delete_string(outStr)
err := newError(errPtr)
if err.isError() {
return "", err.error()
}
result := C.GoString(outStr)
return result, nil
}
func (t *transaction) Validate(stateContext StateContext, boxesToSpent Boxes, dataBoxes Boxes) error {
errPtr := C.ergo_lib_tx_validate(t.p, stateContext.pointer(), boxesToSpent.pointer(), dataBoxes.pointer())
err := newError(errPtr)
if err.isError() {
return err.error()
}
return nil
}
func (t *transaction) pointer() C.TransactionPtr {
return t.p
}
func finalizeTransaction(t *transaction) {
C.ergo_lib_tx_delete(t.p)
}