52 lines
1.3 KiB
JavaScript
52 lines
1.3 KiB
JavaScript
import { getNumber } from "../utils/index.js";
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/**
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* @TODO
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*
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* @_docloc: api/providers/abstract-provider
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*/
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export class BlockConnectionSubscriber {
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#provider;
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#blockNumber;
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#running;
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#filterId;
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constructor(provider) {
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this.#provider = provider;
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this.#blockNumber = -2;
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this.#running = false;
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this.#filterId = null;
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}
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start() {
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if (this.#running) {
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return;
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}
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this.#running = true;
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this.#filterId = this.#provider._subscribe(["newHeads"], (result) => {
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const blockNumber = getNumber(result.number);
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const initial = (this.#blockNumber === -2) ? blockNumber : (this.#blockNumber + 1);
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for (let b = initial; b <= blockNumber; b++) {
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this.#provider.emit("block", b);
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}
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this.#blockNumber = blockNumber;
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});
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}
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stop() {
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if (!this.#running) {
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return;
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}
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this.#running = false;
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if (this.#filterId != null) {
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this.#provider._unsubscribe(this.#filterId);
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this.#filterId = null;
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}
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}
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pause(dropWhilePaused) {
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if (dropWhilePaused) {
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this.#blockNumber = -2;
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}
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this.stop();
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}
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resume() {
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this.start();
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}
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}
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//# sourceMappingURL=subscriber-connection.js.map
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