@lodestar/beacon-node/lib/network/reqresp/handlers/lightClientBootstrap.js

A Typescript implementation of the beacon chain

import { LightClientServerErrorCode, RespStatus, ResponseError, } from "@lodestar/reqresp";
import { computeEpochAtSlot } from "@lodestar/state-transition";
import { assertLightClientServer } from "../../../node/utils/lightclient.js";
import { ReqRespMethod, responseSszTypeByMethod } from "../types.js";
export async function* onLightClientBootstrap(requestBody, chain) {
    assertLightClientServer(chain.lightClientServer);
    try {
        const bootstrap = await chain.lightClientServer.getBootstrap(requestBody);
        const boundary = chain.config.getForkBoundaryAtEpoch(computeEpochAtSlot(bootstrap.header.beacon.slot));
        const type = responseSszTypeByMethod[ReqRespMethod.LightClientBootstrap](boundary.fork, 0);
        yield {
            data: type.serialize(bootstrap),
            boundary,
        };
    }
    catch (e) {
        if (e.type?.code === LightClientServerErrorCode.RESOURCE_UNAVAILABLE) {
            throw new ResponseError(RespStatus.RESOURCE_UNAVAILABLE, e.message);
        }
        throw new ResponseError(RespStatus.SERVER_ERROR, e.message);
    }
}
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