ceremonyclient/nekryptology/pkg/signatures/schnorr/mina/txn.go

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2023-07-05 05:32:28 +00:00
//
// Copyright Coinbase, Inc. All Rights Reserved.
//
// SPDX-License-Identifier: Apache-2.0
//
package mina
import (
"encoding/binary"
"encoding/json"
"fmt"
"github.com/btcsuite/btcutil/base58"
"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves"
)
// Transaction is a Mina transaction for payments or delegations
type Transaction struct {
Fee, FeeToken uint64
FeePayerPk *PublicKey
Nonce, ValidUntil uint32
Memo string
Tag [3]bool
SourcePk, ReceiverPk *PublicKey
TokenId, Amount uint64
Locked bool
NetworkId NetworkType
}
type txnJson struct {
Common txnCommonJson
Body [2]interface{}
}
type txnCommonJson struct {
Fee uint64 `json:"fee"`
FeeToken uint64 `json:"fee_token"`
FeePayerPk string `json:"fee_payer_pk"`
Nonce uint32 `json:"nonce"`
ValidUntil uint32 `json:"valid_until"`
Memo string `json:"memo"`
NetworkId uint8 `json:"network_id"`
}
type txnBodyPaymentJson struct {
SourcePk string `json:"source_pk"`
ReceiverPk string `json:"receiver_pk"`
TokenId uint64 `json:"token_id"`
Amount uint64 `json:"amount"`
}
type txnBodyDelegationJson struct {
Delegator string `json:"delegator"`
NewDelegate string `json:"new_delegate"`
}
func (txn *Transaction) MarshalBinary() ([]byte, error) {
mapper := map[bool]byte{
true: 1,
false: 0,
}
out := make([]byte, 175)
binary.LittleEndian.PutUint64(out, txn.Fee)
binary.LittleEndian.PutUint64(out[8:16], txn.FeeToken)
copy(out[16:48], txn.FeePayerPk.value.ToAffineCompressed())
binary.LittleEndian.PutUint32(out[48:52], txn.Nonce)
binary.LittleEndian.PutUint32(out[52:56], txn.ValidUntil)
out[56] = 0x01
out[57] = byte(len(txn.Memo))
copy(out[58:90], txn.Memo[:])
out[90] = mapper[txn.Tag[0]]
out[91] = mapper[txn.Tag[1]]
out[92] = mapper[txn.Tag[2]]
copy(out[93:125], txn.SourcePk.value.ToAffineCompressed())
copy(out[125:157], txn.ReceiverPk.value.ToAffineCompressed())
binary.LittleEndian.PutUint64(out[157:165], txn.TokenId)
binary.LittleEndian.PutUint64(out[165:173], txn.Amount)
out[173] = mapper[txn.Locked]
out[174] = byte(txn.NetworkId)
return out, nil
}
func (txn *Transaction) UnmarshalBinary(input []byte) error {
mapper := map[byte]bool{
1: true,
0: false,
}
if len(input) < 175 {
return fmt.Errorf("invalid byte sequence")
}
feePayerPk := new(PublicKey)
sourcePk := new(PublicKey)
receiverPk := new(PublicKey)
err := feePayerPk.UnmarshalBinary(input[16:48])
if err != nil {
return err
}
err = sourcePk.UnmarshalBinary(input[93:125])
if err != nil {
return err
}
err = receiverPk.UnmarshalBinary(input[125:157])
if err != nil {
return err
}
txn.Fee = binary.LittleEndian.Uint64(input[:8])
txn.FeeToken = binary.LittleEndian.Uint64(input[8:16])
txn.FeePayerPk = feePayerPk
txn.Nonce = binary.LittleEndian.Uint32(input[48:52])
txn.ValidUntil = binary.LittleEndian.Uint32(input[52:56])
txn.Memo = string(input[58 : 58+input[57]])
txn.Tag[0] = mapper[input[90]]
txn.Tag[1] = mapper[input[91]]
txn.Tag[2] = mapper[input[92]]
txn.SourcePk = sourcePk
txn.ReceiverPk = receiverPk
txn.TokenId = binary.LittleEndian.Uint64(input[157:165])
txn.Amount = binary.LittleEndian.Uint64(input[165:173])
txn.Locked = mapper[input[173]]
txn.NetworkId = NetworkType(input[174])
return nil
}
func (txn *Transaction) UnmarshalJSON(input []byte) error {
var t txnJson
err := json.Unmarshal(input, &t)
if err != nil {
return err
}
strType, ok := t.Body[0].(string)
if !ok {
return fmt.Errorf("unexpected type")
}
memo, _, err := base58.CheckDecode(t.Common.Memo)
if err != nil {
return err
}
if strType == "Payment" {
b, ok := t.Body[1].(txnBodyPaymentJson)
if !ok {
return fmt.Errorf("unexpected type")
}
feePayerPk := new(PublicKey)
err = feePayerPk.ParseAddress(b.SourcePk)
if err != nil {
return err
}
receiverPk := new(PublicKey)
err = receiverPk.ParseAddress(b.ReceiverPk)
if err != nil {
return nil
}
txn.FeePayerPk = feePayerPk
txn.ReceiverPk = receiverPk
} else if strType == "Stake_delegation" {
bType, ok := t.Body[1].([2]interface{})
if !ok {
return fmt.Errorf("unexpected type")
}
delegateType, ok := bType[0].(string)
if !ok {
return fmt.Errorf("unexpected type")
}
if delegateType == "Set_delegate" {
b, ok := bType[1].(txnBodyDelegationJson)
if !ok {
return fmt.Errorf("unexpected type")
}
feePayerPk := new(PublicKey)
err = feePayerPk.ParseAddress(b.Delegator)
if err != nil {
return err
}
receiverPk := new(PublicKey)
err = receiverPk.ParseAddress(b.NewDelegate)
if err != nil {
return err
}
txn.FeePayerPk = feePayerPk
txn.ReceiverPk = receiverPk
} else {
return fmt.Errorf("unexpected type")
}
} else {
return fmt.Errorf("unexpected type")
}
txn.Memo = string(memo[2 : 2+memo[1]])
sourcePk := new(PublicKey)
sourcePk.value = new(curves.Ep).Set(txn.FeePayerPk.value)
txn.Fee = t.Common.Fee
txn.FeeToken = t.Common.FeeToken
txn.Nonce = t.Common.Nonce
txn.ValidUntil = t.Common.ValidUntil
txn.NetworkId = NetworkType(t.Common.NetworkId)
return nil
}
func (txn Transaction) addRoInput(input *roinput) {
input.AddFp(txn.FeePayerPk.value.X())
input.AddFp(txn.SourcePk.value.X())
input.AddFp(txn.ReceiverPk.value.X())
input.AddUint64(txn.Fee)
input.AddUint64(txn.FeeToken)
input.AddBit(txn.FeePayerPk.value.Y().IsOdd())
input.AddUint32(txn.Nonce)
input.AddUint32(txn.ValidUntil)
memo := [34]byte{0x01, byte(len(txn.Memo))}
copy(memo[2:], txn.Memo)
input.AddBytes(memo[:])
for _, b := range txn.Tag {
input.AddBit(b)
}
input.AddBit(txn.SourcePk.value.Y().IsOdd())
input.AddBit(txn.ReceiverPk.value.Y().IsOdd())
input.AddUint64(txn.TokenId)
input.AddUint64(txn.Amount)
input.AddBit(txn.Locked)
}