/
TransactionStatement.ts
72 lines (67 loc) · 2.42 KB
/
TransactionStatement.ts
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/*
* Copyright 2019 NEM
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { GeneratorUtils } from 'catbuffer-typescript';
import { sha3_256 } from 'js-sha3';
import { UInt64 } from '../UInt64';
import { Receipt } from './Receipt';
import { ReceiptSource } from './ReceiptSource';
import { ReceiptType } from './ReceiptType';
import { ReceiptVersion } from './ReceiptVersion';
/**
* A transaction statement is a collection of receipts linked with a transaction in a particular block.
* - Balance Transfer: A mosaic transfer was triggered.
* - Balance Change: A mosaic credit or debit was triggered.
* - Artifact Expiry: An artifact (e.g. namespace, mosaic) expired.
*/
export class TransactionStatement {
/**
* Receipt - transaction statement object
* @param height - The block height
* @param source - The receipt source
* @param receipts - The array of receipt headers.
*/
constructor(
/**
* The block height.
*/
public readonly height: UInt64,
/**
* The receipt source.
*/
public readonly source: ReceiptSource,
/**
* The array of receipt headers.
*/
public readonly receipts: Receipt[],
) {}
/**
* Generate receipt hash
* @return {string} receipt hash in hex
*/
public generateHash(): string {
const hasher = sha3_256.create();
hasher.update(GeneratorUtils.uintToBuffer(ReceiptVersion.TRANSACTION_STATEMENT, 2));
hasher.update(GeneratorUtils.uintToBuffer(ReceiptType.Transaction_Group, 2));
hasher.update(this.source.serialize());
let receiptBytes = Uint8Array.from([]);
this.receipts.forEach((receipt) => {
const bytes = receipt.serialize();
receiptBytes = GeneratorUtils.concatTypedArrays(receiptBytes, bytes);
});
hasher.update(receiptBytes);
return hasher.hex().toUpperCase();
}
}