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BufferArray,
BufferReader,
bytesToHex,
hexToBytes,
writeUInt32BE,
IntegerType,
intToBigInt,
cloneDeep,
SerializationError,
SigningError,
ChainID,
DEFAULT_CHAIN_ID,
TransactionVersion,
} from 'micro-stacks/common';
import { AnchorMode, AuthType, PostConditionMode, PubKeyEncoding } from './common/constants';
import {
Authorization,
createMessageSignature,
createTransactionAuthField,
intoInitialSighashAuth,
isSingleSig,
nextSignature,
setFee,
setNonce,
setSponsorNonce,
setSponsor,
SingleSigSpendingCondition,
SpendingConditionOpts,
verifyOrigin,
serializeAuthorization,
deserializeAuthorization,
} from './authorization';
import { txidFromData } from './common/utils';
import {
deserializePayload,
Payload,
PayloadInput,
PayloadType,
serializePayload,
} from './payload';
import { createLPList, deserializeLPList, LengthPrefixedList, serializeLPList } from './types';
import { isCompressed, isPrivateKeyCompressed, StacksPrivateKey, StacksPublicKey } from './keys';
import { StacksMessageType } from 'micro-stacks/clarity';
export class StacksTransaction {
version: TransactionVersion;
chainId: ChainID;
auth: Authorization;
anchorMode: AnchorMode;
payload: Payload;
postConditionMode: PostConditionMode;
postConditions: LengthPrefixedList;
constructor(
version: TransactionVersion,
auth: Authorization,
payload: PayloadInput,
postConditions?: LengthPrefixedList,
postConditionMode?: PostConditionMode,
anchorMode?: AnchorMode,
chainId?: ChainID
) {
this.version = version;
this.auth = auth;
if ('amount' in payload) {
this.payload = {
...payload,
amount: intToBigInt(payload.amount, false),
};
} else {
this.payload = payload;
}
this.chainId = chainId ?? DEFAULT_CHAIN_ID;
this.postConditionMode = postConditionMode ?? PostConditionMode.Deny;
this.postConditions = postConditions ?? createLPList([]);
if (anchorMode) {
this.anchorMode = anchorMode;
} else {
switch (payload.payloadType) {
case PayloadType.Coinbase:
case PayloadType.PoisonMicroblock: {
this.anchorMode = AnchorMode.OnChainOnly;
break;
}
case PayloadType.ContractCall:
case PayloadType.SmartContract:
case PayloadType.TokenTransfer: {
this.anchorMode = AnchorMode.Any;
break;
}
}
}
}
signBegin() {
const tx = cloneDeep(this);
tx.auth = intoInitialSighashAuth(tx.auth);
return tx.txid();
}
verifyBegin() {
const tx = cloneDeep(this);
tx.auth = intoInitialSighashAuth(tx.auth);
return tx.txid();
}
createTxWithSignature(signature: string | Uint8Array): StacksTransaction {
const parsedSig = typeof signature === 'string' ? signature : bytesToHex(signature);
const tx = cloneDeep<StacksTransaction>(this);
Iif (!tx.auth.spendingCondition) {
throw new Error('Cannot set signature on transaction without spending condition');
}
(tx.auth.spendingCondition as SingleSigSpendingCondition).signature =
createMessageSignature(parsedSig);
return tx;
}
verifyOrigin(): string {
return verifyOrigin(this.auth, this.verifyBegin());
}
async signNextOrigin(sigHash: string, privateKey: StacksPrivateKey): Promise<string> {
Iif (this.auth.spendingCondition === undefined) {
throw new Error('"auth.spendingCondition" is undefined');
}
Iif (this.auth.authType === undefined) {
throw new Error('"auth.authType" is undefined');
}
return this.signAndAppend(this.auth.spendingCondition, sigHash, AuthType.Standard, privateKey);
}
async signNextSponsor(sigHash: string, privateKey: StacksPrivateKey): Promise<string> {
if (this.auth.authType === AuthType.Sponsored) {
const sig = await this.signAndAppend(
this.auth.sponsorSpendingCondition,
sigHash,
AuthType.Sponsored,
privateKey
);
return sig;
} else E{
throw new Error('"auth.sponsorSpendingCondition" is undefined');
}
}
appendPubkey(publicKey: StacksPublicKey) {
const cond = this.auth.spendingCondition;
if (cond && !isSingleSig(cond)) {
const compressed = isCompressed(publicKey);
cond.fields.push(
createTransactionAuthField(
compressed ? PubKeyEncoding.Compressed : PubKeyEncoding.Uncompressed,
publicKey
)
);
} else E{
throw new Error(`Can't append public key to a singlesig condition`);
}
}
async signAndAppend(
condition: SpendingConditionOpts,
curSigHash: string,
authType: AuthType,
privateKey: StacksPrivateKey
): Promise<string> {
const { nextSig, nextSigHash } = await nextSignature(
curSigHash,
authType,
condition.fee,
condition.nonce,
privateKey
);
if (isSingleSig(condition)) {
condition.signature = nextSig;
} else {
const compressed = privateKey.compressed || isPrivateKeyCompressed(privateKey.data);
condition.fields.push(
createTransactionAuthField(
compressed ? PubKeyEncoding.Compressed : PubKeyEncoding.Uncompressed,
nextSig
)
);
}
return nextSigHash;
}
txid(): string {
const serialized = this.serialize();
return txidFromData(serialized);
}
setSponsor(sponsorSpendingCondition: SpendingConditionOpts) {
Iif (this.auth.authType != AuthType.Sponsored) {
throw new SigningError('Cannot sponsor sign a non-sponsored transaction');
}
this.auth = setSponsor(this.auth, sponsorSpendingCondition);
}
/**
* Set the total fee to be paid for this transaction
*
* @param fee - the fee amount in microstacks
*/
setFee(amount: IntegerType) {
this.auth = setFee(this.auth, amount);
}
/**
* Set the transaction nonce
*
* @param nonce - the nonce value
*/
setNonce(nonce: IntegerType) {
this.auth = setNonce(this.auth, nonce);
}
/**
* Set the transaction sponsor nonce
*
* @param nonce - the sponsor nonce value
*/
setSponsorNonce(nonce: IntegerType) {
Iif (this.auth.authType != AuthType.Sponsored) {
throw new SigningError('Cannot sponsor sign a non-sponsored transaction');
}
this.auth = setSponsorNonce(this.auth, nonce);
}
serialize(): Uint8Array {
Iif (this.version === undefined) {
throw new SerializationError('"version" is undefined');
}
Iif (this.chainId === undefined) {
throw new SerializationError('"chainId" is undefined');
}
Iif (this.auth === undefined) {
throw new SerializationError('"auth" is undefined');
}
Iif (this.anchorMode === undefined) {
throw new SerializationError('"anchorMode" is undefined');
}
Iif (this.payload === undefined) {
throw new SerializationError('"payload" is undefined');
}
const bufferArray: BufferArray = new BufferArray();
bufferArray.appendByte(this.version);
const chainIdBuffer = new Uint8Array(4);
writeUInt32BE(chainIdBuffer, this.chainId, 0);
bufferArray.push(chainIdBuffer);
bufferArray.push(serializeAuthorization(this.auth));
bufferArray.appendByte(this.anchorMode);
bufferArray.appendByte(this.postConditionMode);
bufferArray.push(serializeLPList(this.postConditions));
bufferArray.push(serializePayload(this.payload));
return bufferArray.concatBuffer();
}
}
/**
* @param data Buffer or hex string
*/
export function deserializeTransaction(data: BufferReader | Uint8Array | string) {
let bufferReader: BufferReader;
if (typeof data === 'string') {
if (data.slice(0, 2).toLowerCase() === '0x') {
bufferReader = new BufferReader(hexToBytes(data.slice(2)));
} else {
bufferReader = new BufferReader(hexToBytes(data));
}
} else if (data instanceof Uint8Array) {
bufferReader = new BufferReader(data);
} else {
bufferReader = data;
}
const version = bufferReader.readUInt8Enum(TransactionVersion, n => {
throw new Error(`Could not parse ${n} as TransactionVersion`);
});
const chainId = bufferReader.readUInt32BE();
const auth = deserializeAuthorization(bufferReader);
const anchorMode = bufferReader.readUInt8Enum(AnchorMode, n => {
throw new Error(`Could not parse ${n} as AnchorMode`);
});
const postConditionMode = bufferReader.readUInt8Enum(PostConditionMode, n => {
throw new Error(`Could not parse ${n} as PostConditionMode`);
});
const postConditions = deserializeLPList(bufferReader, StacksMessageType.PostCondition);
const payload = deserializePayload(bufferReader);
return new StacksTransaction(
version,
auth,
payload,
postConditions,
postConditionMode,
anchorMode,
chainId
);
}
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