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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | 10x 10x 10x 10x 10x 39x 39x 39x 39x 39x 39x 39x 9x 4x 1x 8x 1x 1x 1x 1x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 41x 41x 41x 41x 16x 16x 11x 1x 40x 5x 5x 5x 5x 7x 7x 7x 7x 1x | import { StacksTransaction } from './transaction';
import { StacksPrivateKey, StacksPublicKey } from './keys';
import { isSingleSig, nextVerification, SpendingConditionOpts } from './authorization';
import { AuthType, PubKeyEncoding } from './common/constants';
import { cloneDeep, SigningError } from 'micro-stacks/common';
import { StacksMessageType } from 'micro-stacks/clarity';
export class TransactionSigner {
transaction: StacksTransaction;
sigHash: string;
originDone: boolean;
checkOversign: boolean;
checkOverlap: boolean;
constructor(transaction: StacksTransaction) {
this.transaction = transaction;
this.sigHash = transaction.signBegin();
this.originDone = false;
this.checkOversign = true;
this.checkOverlap = true;
// If multi-sig spending condition exists, iterate over
// auth fields and reconstruct sigHash
const spendingCondition = transaction.auth.spendingCondition;
if (spendingCondition && !isSingleSig(spendingCondition)) {
if (
spendingCondition.fields.filter(
field => field.contents.type === StacksMessageType.MessageSignature
).length >= spendingCondition.signaturesRequired
) {
throw new Error('SpendingCondition has more signatures than are expected');
}
spendingCondition.fields.forEach(field => {
if (field.contents.type === StacksMessageType.MessageSignature) {
const signature = field.contents;
const nextVerify = nextVerification(
this.sigHash,
transaction.auth.authType,
spendingCondition.fee,
spendingCondition.nonce,
PubKeyEncoding.Compressed, // always compressed for multisig
signature
);
this.sigHash = nextVerify.nextSigHash;
}
});
}
}
static createSponsorSigner(
transaction: StacksTransaction,
spendingCondition: SpendingConditionOpts
) {
Iif (transaction.auth.authType != AuthType.Sponsored) {
throw new SigningError('Cannot add sponsor to non-sponsored transaction');
}
const tx: StacksTransaction = cloneDeep(transaction);
tx.setSponsor(spendingCondition);
const originSigHash = tx.verifyOrigin();
const signer = new this(tx);
signer.originDone = true;
signer.sigHash = originSigHash;
signer.checkOversign = true;
signer.checkOverlap = true;
return signer;
}
async signOrigin(privateKey: StacksPrivateKey) {
Iif (this.checkOverlap && this.originDone)
throw new SigningError('Cannot sign origin after sponsor key');
Iif (this.transaction.auth === undefined)
throw new SigningError('"transaction.auth" is undefined');
Iif (this.transaction.auth.spendingCondition === undefined)
throw new SigningError('"transaction.auth.spendingCondition" is undefined');
if (!isSingleSig(this.transaction.auth.spendingCondition)) {
const spendingCondition = this.transaction.auth.spendingCondition;
if (
this.checkOversign &&
spendingCondition.fields.filter(
field => field.contents.type === StacksMessageType.MessageSignature
).length >= spendingCondition.signaturesRequired
) {
throw new Error('Origin would have too many signatures');
}
}
this.sigHash = await this.transaction.signNextOrigin(this.sigHash, privateKey);
}
appendOrigin(publicKey: StacksPublicKey) {
Iif (this.checkOverlap && this.originDone)
throw Error('Cannot append public key to origin after sponsor key');
Iif (this.transaction.auth === undefined) throw new Error('"transaction.auth" is undefined');
Iif (this.transaction.auth.spendingCondition === undefined)
throw new Error('"transaction.auth.spendingCondition" is undefined');
this.transaction.appendPubkey(publicKey);
}
async signSponsor(privateKey: StacksPrivateKey) {
Iif (this.transaction.auth === undefined)
throw new SigningError('"transaction.auth" is undefined');
Iif (this.transaction.auth.authType !== AuthType.Sponsored)
throw new SigningError('"transaction.auth.authType" is not AuthType.Sponsored');
this.sigHash = await this.transaction.signNextSponsor(this.sigHash, privateKey);
this.originDone = true;
}
getTxInComplete(): StacksTransaction {
return cloneDeep(this.transaction);
}
resume(transaction: StacksTransaction) {
this.transaction = cloneDeep(transaction);
this.sigHash = transaction.signBegin();
}
}
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