76 lines
2.0 KiB
TypeScript
76 lines
2.0 KiB
TypeScript
import { StatRepository } from "../../repositories";
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import { solana } from "../../entities";
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import winston from "winston";
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/**
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* Handling means mapping and forward to a given target if present.
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*/
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export class HandleSolanaTransactions<T> {
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cfg: HandleSolanaTxConfig;
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mapper: (txs: solana.Transaction, args: { programId: string }) => Promise<T[]>;
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target?: (parsed: T[], chain: string) => Promise<void>;
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logger: winston.Logger = winston.child({ module: "HandleSolanaTransaction" });
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statsRepo?: StatRepository;
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constructor(
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cfg: HandleSolanaTxConfig,
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mapper: (tx: solana.Transaction) => Promise<T[]>,
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target?: (parsed: T[], chain: string) => Promise<void>,
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statsRepo?: StatRepository
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) {
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this.cfg = cfg;
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this.mapper = mapper;
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this.target = target;
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this.statsRepo = statsRepo;
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}
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public async handle(txs: solana.Transaction[]): Promise<T[]> {
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const filteredItems = txs.filter((tx) => {
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const hasError = tx.meta?.err;
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if (hasError)
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this.logger.warn(
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`Ignoring tx for program ${this.cfg.programId} in ${tx.slot} has error: ${JSON.stringify(
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tx.meta?.err
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)}`
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);
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return !hasError;
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});
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let mappedItems: T[] = [];
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for (const tx of filteredItems) {
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const result = await this.mapper(tx, { programId: this.cfg.programId });
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if (result.length) {
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this.report();
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mappedItems = mappedItems.concat(result);
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}
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}
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if (this.target) {
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await this.target(mappedItems, this.cfg.chain);
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} else {
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this.logger.warn(`No target for ${this.cfg.programId} txs`);
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}
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return mappedItems;
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}
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private report() {
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const labels = {
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job: this.cfg.id,
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chain: this.cfg.chain ?? "",
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commitment: this.cfg.commitment,
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};
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this.statsRepo!.count(this.cfg.metricName, labels);
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}
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}
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export type HandleSolanaTxConfig = {
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metricName: string;
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programId: string;
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commitment: string;
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chainId: number;
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chain: string;
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abi: string;
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id: string;
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};
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