49 lines
1.5 KiB
TypeScript
49 lines
1.5 KiB
TypeScript
import { BytesLike, ethers } from "ethers";
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import { EvmTag } from "../../../domain/entities";
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import {
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EvmJsonRPCBlockRepository,
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EvmJsonRPCBlockRepositoryCfg,
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ProviderPoolMap,
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} from "./EvmJsonRPCBlockRepository";
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const POLYGON_ROOT_CHAIN_ADDRESS = "0x86E4Dc95c7FBdBf52e33D563BbDB00823894C287";
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const FINALIZED = "finalized";
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export class PolygonJsonRPCBlockRepository extends EvmJsonRPCBlockRepository {
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constructor(cfg: EvmJsonRPCBlockRepositoryCfg, pools: ProviderPoolMap) {
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super(cfg, pools);
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}
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async getBlockHeight(chain: string, finality: EvmTag): Promise<bigint> {
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if (finality == FINALIZED) {
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try {
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const rootChain = new ethers.utils.Interface([
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`function getLastChildBlock() external view returns (uint256)`,
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]);
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const callData = rootChain.encodeFunctionData("getLastChildBlock");
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const callResult: CallResult[] = await this.getChainProvider(chain).post(chain, [
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{
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jsonrpc: "2.0",
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id: 1,
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method: "eth_call",
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params: [{ to: POLYGON_ROOT_CHAIN_ADDRESS, data: callData }, FINALIZED],
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},
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]);
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const block = rootChain.decodeFunctionResult("getLastChildBlock", callResult[0].result)[0];
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return BigInt(block);
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} catch (e) {
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this.handleError(chain, e, "getBlockHeight", "eth_call");
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throw new Error(`Unable to parse result of eth_call, ${e}`);
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}
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}
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return await super.getBlockHeight(chain, finality);
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}
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}
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type CallResult = {
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result: BytesLike;
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};
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