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66 lines
2.8 KiB
66 lines
2.8 KiB
import {FirebaseUnit} from "../FirebaseUnit"
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import {TransactionResource, TransactionResourceItem} from "../../rtdb/TransactionResource"
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import {Singleton, Inject} from "@extollo/di"
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import {Unit, Logging} from "@extollo/lib"
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import * as openpgp from "openpgp"
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/**
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* Transaction Unit
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* ---------------------------------------
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* Put some description here.
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*/
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@Singleton()
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export class Transaction extends Unit {
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@Inject()
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protected readonly firebase!: FirebaseUnit
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public async compareTransactions(transaction1: TransactionResourceItem, transaction2: TransactionResourceItem){
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// verify signature
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const result1 = await openpgp.verify({
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publicKeys: await openpgp.readKey({
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armoredKey: transaction2.partnerPublicKey
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}),
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message: openpgp.Message.fromText(transaction1.combinedHash),
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signature: await openpgp.readSignature({
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armoredSignature: transaction1.validationSignature // parse detached signature
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})
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})
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const result2 = await openpgp.verify({
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publicKeys: await openpgp.readKey({
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armoredKey: transaction1.partnerPublicKey
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}),
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message: openpgp.Message.fromText(transaction2.combinedHash),
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signature: await openpgp.readSignature({
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armoredSignature: transaction2.validationSignature // parse detached signature
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})
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})
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return await (result1.signatures[0].verified) && await (result2.signatures[0].verified);
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}
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public async up() {
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this.firebase.ref("transaction").on("value", async () => {
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// array of pairs of tranaction resource items
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const groupedTransactions: [TransactionResourceItem, TransactionResourceItem][] = []
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// collection of transaction resource items
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let transactions = await TransactionResource.collect().collect()
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// compare each item
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transactions.each(transaction1 => {
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// for each item that is not itself
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transactions.where("combinedHash", "!=", transaction1.combinedHash)
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// get a second item
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.each(transaction2 => {
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//if the item matches
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if (this.compareTransactions(transaction1, transaction2)) {
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// and remove the two matching items
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transactions = transactions.whereNotIn("combinedHash", [transaction1.combinedHash, transaction2.combinedHash])
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// insert grouped items into groupedTransactions
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groupedTransactions.push([transaction1, transaction2]);
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}
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})
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})
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})
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}
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public async down() {
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}
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}
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