*Switch to new optimistic proxy approach based on kevlar and patronum

This commit is contained in:
Derrick Hammer 2023-03-29 00:02:16 -04:00
parent 8501074b25
commit 2f66fc332a
Signed by: pcfreak30
GPG Key ID: C997C339BE476FF2
10 changed files with 1249 additions and 19 deletions

330
src/client/client.ts Normal file
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import {
Bytes32,
ClientConfig,
ExecutionInfo,
LightClientUpdate,
OptimisticUpdate,
VerifyWithReason,
} from "./types.js";
import { getDefaultClientConfig, handleGETRequest } from "./utils.js";
import { IProver, IStore } from "./interfaces.js";
import {
BEACON_SYNC_SUPER_MAJORITY,
DEFAULT_BATCH_SIZE,
POLLING_DELAY,
} from "./constants.js";
import {
computeSyncPeriodAtSlot,
getCurrentSlot,
} from "@lodestar/light-client/utils";
import {
assertValidLightClientUpdate,
assertValidSignedHeader,
} from "@lodestar/light-client/validation";
import { SyncCommitteeFast } from "@lodestar/light-client";
import bls from "@chainsafe/bls/switchable";
import { PublicKey } from "@chainsafe/bls/types.js";
import { fromHexString, toHexString } from "@chainsafe/ssz";
import { AsyncOrSync } from "ts-essentials";
import * as altair from "@lodestar/types/altair";
import * as phase0 from "@lodestar/types/phase0";
import * as bellatrix from "@lodestar/types/bellatrix";
import { init } from "@chainsafe/bls/switchable";
import NodeCache from "node-cache";
export default class Client {
latestCommittee?: Uint8Array[];
latestBlockHash?: string;
private config: ClientConfig = getDefaultClientConfig();
private genesisCommittee: Uint8Array[] = this.config.genesis.committee.map(
(pk) => fromHexString(pk)
);
private genesisPeriod = computeSyncPeriodAtSlot(this.config.genesis.slot);
private genesisTime = this.config.genesis.time;
private prover: IProver;
private boot = false;
private beaconChainAPIURL: string;
private store: IStore;
constructor(prover: IProver, store: IStore, beaconUrl: string) {
this.prover = prover;
this.store = store;
this.beaconChainAPIURL = beaconUrl;
}
private _latestPeriod: number = -1;
get latestPeriod(): number {
return this._latestPeriod;
}
private _blockCache = new NodeCache({ stdTTL: 60 * 60 * 12 });
get blockCache(): NodeCache {
return this._blockCache;
}
private _blockHashCache = new NodeCache();
get blockHashCache(): NodeCache {
return this._blockHashCache;
}
public get isSynced() {
return this._latestPeriod === this.getCurrentPeriod();
}
public async sync(): Promise<void> {
await init("herumi");
await this._sync();
await this.getNextValidExecutionInfo();
if (!this.boot) {
this.subscribe();
this.boot = true;
}
}
async syncProver(
startPeriod: number,
currentPeriod: number,
startCommittee: Uint8Array[]
): Promise<{ syncCommittee: Uint8Array[]; period: number }> {
for (let period = startPeriod; period < currentPeriod; period += 1) {
try {
const update = await this.prover.getSyncUpdate(
period,
currentPeriod,
DEFAULT_BATCH_SIZE
);
const validOrCommittee = await this.syncUpdateVerifyGetCommittee(
startCommittee,
period,
update
);
if (!(validOrCommittee as boolean)) {
console.log(`Found invalid update at period(${period})`);
return {
syncCommittee: startCommittee,
period,
};
}
await this.store.addUpdate(period, update);
startCommittee = validOrCommittee as Uint8Array[];
} catch (e) {
console.error(`failed to fetch sync update for period(${period})`);
return {
syncCommittee: startCommittee,
period,
};
}
}
return {
syncCommittee: startCommittee,
period: currentPeriod,
};
}
// returns the prover info containing the current sync
public getCurrentPeriod(): number {
return computeSyncPeriodAtSlot(
getCurrentSlot(this.config.chainConfig, this.genesisTime)
);
}
public async subscribe() {
setInterval(async () => {
try {
await this._sync();
const ei = await this.getLatestExecution();
if (ei && ei.blockhash !== this.latestBlockHash) {
this.latestBlockHash = ei.blockhash;
}
} catch (e) {
console.error(e);
}
}, POLLING_DELAY);
}
optimisticUpdateFromJSON(update: any): OptimisticUpdate {
return altair.ssz.LightClientOptimisticUpdate.fromJson(update);
}
async optimisticUpdateVerify(
committee: Uint8Array[],
update: OptimisticUpdate
): Promise<VerifyWithReason> {
const { attestedHeader: header, syncAggregate } = update;
const headerBlockRoot = phase0.ssz.BeaconBlockHeader.hashTreeRoot(
header.beacon
);
const committeeFast = this.deserializeSyncCommittee(committee);
try {
await assertValidSignedHeader(
this.config.chainConfig,
committeeFast,
syncAggregate,
headerBlockRoot,
header.beacon.slot
);
} catch (e) {
return { correct: false, reason: "invalid signatures" };
}
const participation =
syncAggregate.syncCommitteeBits.getTrueBitIndexes().length;
if (participation < BEACON_SYNC_SUPER_MAJORITY) {
return { correct: false, reason: "insufficient signatures" };
}
return { correct: true };
}
public async getNextValidExecutionInfo(
retry: number = 10
): Promise<ExecutionInfo> {
if (retry === 0)
throw new Error(
"no valid execution payload found in the given retry limit"
);
const ei = await this.getLatestExecution();
if (ei) return ei;
// delay for the next slot
await new Promise((resolve) => setTimeout(resolve, POLLING_DELAY));
return this.getNextValidExecutionInfo(retry - 1);
}
public async getExecutionFromBlockRoot(
slot: bigint,
expectedBlockRoot: Bytes32
): Promise<ExecutionInfo> {
const res = await handleGETRequest(
`${this.beaconChainAPIURL}/eth/v2/beacon/blocks/${slot}`
);
if (!res) {
throw Error(`fetching block failed`);
}
const blockJSON = res.data.message.body;
const block = bellatrix.ssz.BeaconBlockBody.fromJson(blockJSON);
const blockRoot = toHexString(
bellatrix.ssz.BeaconBlockBody.hashTreeRoot(block)
);
if (blockRoot !== expectedBlockRoot) {
throw Error(
`block provided by the beacon chain api doesn't match the expected block root`
);
}
this._blockCache.set(slot as any, res);
this._blockHashCache.set(slot as any, expectedBlockRoot);
return {
blockhash: blockJSON.execution_payload.block_hash,
blockNumber: blockJSON.execution_payload.block_number,
};
}
protected async _sync() {
const currentPeriod = this.getCurrentPeriod();
if (currentPeriod > this._latestPeriod) {
this.latestCommittee = await this.syncFromGenesis();
this._latestPeriod = currentPeriod;
}
}
// committee and prover index of the first honest prover
protected async syncFromGenesis(): Promise<Uint8Array[]> {
// get the tree size by currentPeriod - genesisPeriod
const currentPeriod = this.getCurrentPeriod();
let startPeriod = this.genesisPeriod;
let startCommittee = this.genesisCommittee;
console.log(
`Sync started from period(${startPeriod}) to period(${currentPeriod})`
);
const { syncCommittee, period } = await this.syncProver(
startPeriod,
currentPeriod,
startCommittee
);
if (period === currentPeriod) {
return syncCommittee;
}
throw new Error("no honest prover found");
}
protected async syncUpdateVerifyGetCommittee(
prevCommittee: Uint8Array[],
period: number,
update: LightClientUpdate
): Promise<false | Uint8Array[]> {
const updatePeriod = computeSyncPeriodAtSlot(
update.attestedHeader.beacon.slot
);
if (period !== updatePeriod) {
console.error(
`Expected update with period ${period}, but recieved ${updatePeriod}`
);
return false;
}
const prevCommitteeFast = this.deserializeSyncCommittee(prevCommittee);
try {
// check if the update has valid signatures
await assertValidLightClientUpdate(
this.config.chainConfig,
prevCommitteeFast,
update
);
return update.nextSyncCommittee.pubkeys;
} catch (e) {
console.error(e);
return false;
}
}
protected async getLatestExecution(): Promise<ExecutionInfo | null> {
const updateJSON = await handleGETRequest(
`${this.beaconChainAPIURL}/eth/v1/beacon/light_client/optimistic_update`
);
if (!updateJSON) {
throw Error(`fetching optimistic update failed`);
}
const update = this.optimisticUpdateFromJSON(updateJSON.data);
const verify = await this.optimisticUpdateVerify(
this.latestCommittee,
update
);
if (!verify.correct) {
// @ts-ignore
console.error(`Invalid Optimistic Update: ${verify?.reason}`);
return null;
}
console.log(
`Optimistic update verified for slot ${updateJSON.data.attested_header.beacon.slot}`
);
return this.getExecutionFromBlockRoot(
updateJSON.data.attested_header.beacon.slot,
updateJSON.data.attested_header.beacon.body_root
);
}
private deserializeSyncCommittee(
syncCommittee: Uint8Array[]
): SyncCommitteeFast {
const pubkeys = this.deserializePubkeys(syncCommittee);
return {
pubkeys,
aggregatePubkey: bls.PublicKey.aggregate(pubkeys),
};
}
private deserializePubkeys(pubkeys: Uint8Array[]): PublicKey[] {
return pubkeys.map((pk) => bls.PublicKey.fromBytes(pk));
}
}

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src/client/constants.ts Normal file
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export const BEACON_SYNC_COMMITTEE_SIZE = 512;
export const mainnetConfig = {
genesis_time: "1606824023",
genesis_validator_root:
"0x4b363db94e286120d76eb905340fdd4e54bfe9f06bf33ff6cf5ad27f511bfe95",
slot: "6046691",
committee_pk: [
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"0x89bd0a7ff808295f7ad77356a20d58252c4cafc38c1bfdf57a6675bacd192a549c80b6c0f0e67fdf647e8f31e5b9cf8d",
"0xb2a024a13871b071dec5b6c6cfbdaa5791646cb1f60f2b077dba7d732fcc6d6b806ed7e39af1218a0a6f94892702c953",
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"0x8700b39fc4738816227440f20fd8b22a52d9fa1da598fc1509969073beae34e23fb0f963e1007907b47801ac9b3aa30e",
"0x891e56d074bf4500ab2ba55ff77a08eae23009473bea1f8db5a8479246ede43132f2957cff657c97f00b3310ddf6d202",
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"0xb53251df22419f7dc65242488e2f38e0e01aa60412eaa5123e4067ac5d76f20e72d093a838f91539eacfb1c9086a46f7",
"0xb549a2984990b3a159b6be06d59c158f43b69cf8acabc035572e1d15c3255c51f8a0f3df788cdfd244e878c055f25ac9",
"0xa615712ae4d4fd3ef9723fa09988a44b677beb098fce85bf4ea39a943cc027ba2547ee5ec4143b5f00011916a5f358db",
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"0xa8f096db03c9e1e6675bbccb9a26bd202cbea463f9557e3de5b6e08aa15fdc2345a898656fb9077fb32fa30ea69a0e7b",
"0x91fae7166f0f4d21e7fba3f7737a7d88b38d472de99dbd61a6b26ec935bba0da282d8b8b9b2c94e7bdf2003b5d354931",
"0x8d6354c49b46d287d27c228f7935de94848a2eea7e0ba3d69e24f4569fdc400be68d829e6579b4b39f36cd44cb382dcc",
"0xa18219917297c3cfd8341e0b434780b541f19b59f8e0044b42c02b333a5f56441b84db7ae94955a06fa14a0cea39bad7",
"0xa72f04ca6876fad40e71fdc530f47483ca634710a8d7b0a26dc31bd4ab9c505860f31891e66ceb0446f2418866c800cf",
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"0x9781d4b1026ec1b492a245957b1f3cafbaae598e19a52a84df68d66c34fffb0e26e2396dd33fa6923f93ee424cb328f7",
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"0x8f69ecdacc5b69f51b7c86c4034535cecf71325b4ee701d1df7386558cb22dbed2f0b0ea46708fe7299edfd87ad538e8",
"0x87bbd9dbb43e5f563efe01f5078dc41f11649649959513272db71cf7ecd2fcd56505ad41662f176834c689c575c83771",
"0xb62c985584ff5e6f37e4e3df1ed689af83cfbb8e1cb84512ce9c86cd3feeefb03cc7d8cc95626ad4d4401dd8cc7cbb4b",
],
};
export const BEACON_SYNC_SUPER_MAJORITY = Math.ceil(
(BEACON_SYNC_COMMITTEE_SIZE * 2) / 3
);
// These are the rough numbers from benchmark experiments
export const DEFAULT_BATCH_SIZE = 200;
export const DEFAULT_TREE_DEGREE = 200;
export const POLLING_DELAY = 13 * 1000; //13s (slightly higher than the slot time)

4
src/client/index.ts Normal file
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@ -0,0 +1,4 @@
import Client from "./client.js";
import Prover from "./prover.js";
export { Client, Prover };

13
src/client/interfaces.ts Normal file
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@ -0,0 +1,13 @@
import { AsyncOrSync } from "ts-essentials";
import { LightClientUpdate } from "./types.js";
export interface IProver {
getSyncUpdate(
period: number,
currentPeriod: number,
cacheCount: number
): AsyncOrSync<LightClientUpdate>;
}
export interface IStore {
addUpdate(period: number, update: LightClientUpdate): AsyncOrSync<void>;
}

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@ -0,0 +1,52 @@
import { digest } from "@chainsafe/as-sha256";
import { IStore } from "./interfaces.js";
import { LightClientUpdate } from "./types.js";
import { LightClientUpdateSSZ, CommitteeSSZ, HashesSSZ } from "./ssz.js";
import { concatUint8Array } from "./utils.js";
export class MemoryStore implements IStore {
store: {
[period: number]: {
update: Uint8Array;
nextCommittee: Uint8Array;
nextCommitteeHash: Uint8Array;
};
} = {};
addUpdate(period: number, update: LightClientUpdate) {
this.store[period] = {
update: LightClientUpdateSSZ.serialize(update),
nextCommittee: CommitteeSSZ.serialize(update.nextSyncCommittee.pubkeys),
nextCommitteeHash: digest(
concatUint8Array(update.nextSyncCommittee.pubkeys)
),
};
}
getUpdate(period: number): Uint8Array {
if (period in this.store) return this.store[period].update;
throw new Error(`update unavailable for period ${period}`);
}
getCommittee(period: number): Uint8Array {
if (period < 1)
throw new Error("committee not unavailable for period less than 1");
const predPeriod = period - 1;
if (predPeriod in this.store) return this.store[predPeriod].nextCommittee;
throw new Error(`committee unavailable for period ${predPeriod}`);
}
getCommitteeHashes(period: number, count: number): Uint8Array {
if (period < 1)
throw new Error("committee not unavailable for period less than 1");
const predPeriod = period - 1;
const hashes = new Array(count).fill(0).map((_, i) => {
const p = predPeriod + i;
if (p in this.store) return this.store[p].nextCommitteeHash;
throw new Error(`committee unavailable for period ${p}`);
});
return HashesSSZ.serialize(hashes);
}
}

39
src/client/prover.ts Normal file
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@ -0,0 +1,39 @@
import * as altair from "@lodestar/types/altair";
import { IProver } from "./interfaces.js";
import { LightClientUpdate } from "./types.js";
import { handleGETRequest } from "./utils.js";
export default class Prover implements IProver {
cachedSyncUpdate: Map<number, LightClientUpdate> = new Map();
private serverUrl: string;
constructor(serverUrl: string) {
this.serverUrl = serverUrl;
}
async _getSyncUpdates(
startPeriod: number,
maxCount: number
): Promise<LightClientUpdate[]> {
const res = await handleGETRequest(
`${this.serverUrl}/eth/v1/beacon/light_client/updates?start_period=${startPeriod}&count=${maxCount}`,
false
);
return res.map((u: any) => altair.ssz.LightClientUpdate.fromJson(u.data));
}
async getSyncUpdate(
period: number,
currentPeriod: number,
cacheCount: number
): Promise<LightClientUpdate> {
const _cacheCount = Math.min(currentPeriod - period + 1, cacheCount);
if (!this.cachedSyncUpdate.has(period)) {
const vals = await this._getSyncUpdates(period, _cacheCount);
for (let i = 0; i < _cacheCount; i++) {
this.cachedSyncUpdate.set(period + i, vals[i]);
}
}
return this.cachedSyncUpdate.get(period)!;
}
}

26
src/client/ssz.ts Normal file
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@ -0,0 +1,26 @@
import {
ContainerType,
VectorCompositeType,
ByteVectorType,
BooleanType,
UintNumberType,
ListCompositeType,
} from '@chainsafe/ssz';
import * as altair from '@lodestar/types/altair';
import { BEACON_SYNC_COMMITTEE_SIZE } from './constants.js';
const MAX_BATCHSIZE = 10000;
export const LightClientUpdateSSZ = altair.ssz.LightClientUpdate;
export const LightClientUpdatesSSZ = new ListCompositeType(
LightClientUpdateSSZ as any,
MAX_BATCHSIZE,
);
export const CommitteeSSZ = new VectorCompositeType(
new ByteVectorType(48),
BEACON_SYNC_COMMITTEE_SIZE,
);
const HashSSZ = new ByteVectorType(32);
export const HashesSSZ = new ListCompositeType(HashSSZ, MAX_BATCHSIZE);

32
src/client/types.ts Normal file
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@ -0,0 +1,32 @@
import { routes } from "@lodestar/api";
import { BeaconConfig } from "@lodestar/config";
import * as altair from "@lodestar/types/altair";
export type PubKeyString = string;
export type Slot = number;
export type Bytes32 = string;
export type OptimisticUpdate = altair.LightClientOptimisticUpdate;
export type LightClientUpdate = altair.LightClientUpdate;
export type GenesisData = {
committee: PubKeyString[];
slot: Slot;
time: number;
};
export type ClientConfig = {
genesis: GenesisData;
chainConfig: BeaconConfig;
// treeDegree in case of Superlight and batchSize in case of Light and Optimistic
n?: number;
};
export type ExecutionInfo = {
blockhash: string;
blockNumber: bigint;
};
export type VerifyWithReason =
| { correct: true }
| { correct: false; reason: string };

50
src/client/utils.ts Normal file
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@ -0,0 +1,50 @@
import { fromHexString, toHexString } from "@chainsafe/ssz";
import bls from "@chainsafe/bls/switchable";
import { createBeaconConfig } from "@lodestar/config";
import { mainnetConfig } from "./constants.js";
import { networksChainConfig } from "@lodestar/config/networks";
import fetch from "node-fetch";
export function concatUint8Array(data: Uint8Array[]) {
const l = data.reduce((l, d) => l + d.length, 0);
let result = new Uint8Array(l);
let offset = 0;
data.forEach((d) => {
result.set(d, offset);
offset += d.length;
});
return result;
}
export function getDefaultClientConfig() {
const chainConfig = createBeaconConfig(
networksChainConfig.mainnet,
fromHexString(mainnetConfig.genesis_validator_root)
);
return {
genesis: {
committee: mainnetConfig.committee_pk,
slot: parseInt(mainnetConfig.slot),
time: parseInt(mainnetConfig.genesis_time),
},
chainConfig,
n: 1,
};
}
export async function handleGETRequest(
url: string,
isBuffer: boolean = true,
retry: number = 3
): Promise<any> {
if (retry < 0) {
throw Error(`GET request failed: ${url}`);
}
try {
const ret = await fetch(url);
return await ret.json();
} catch (e) {
console.error(`failed GET request (${url}): ${e.message}`);
return handleGETRequest(url, isBuffer, retry - 1);
}
}

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@ -1,13 +1,17 @@
import type { Plugin, PluginAPI } from "@lumeweb/interface-relay"; import type { Plugin, PluginAPI } from "@lumeweb/interface-relay";
import fetch, { Request, RequestInit } from "node-fetch"; import fetch, { Request, RequestInit } from "node-fetch";
import NodeCache from "node-cache";
import { URL } from "url"; import stringify from "json-stringify-deterministic";
import { Client, Prover } from "./client/index.js";
import { MemoryStore } from "./client/memory-store.js";
const EXECUTION_RPC_URL = const EXECUTION_RPC_URL =
"https://g.w.lavanet.xyz:443/gateway/eth/rpc-http/f195d68175eb091ec1f71d00f8952b85"; "https://g.w.lavanet.xyz:443/gateway/eth/rpc-http/f195d68175eb091ec1f71d00f8952b85";
const CONSENSUS_RPC_URL = "https://www.lightclientdata.org"; const CONSENSUS_RPC_URL = "https://www.lightclientdata.org";
const RPC_CACHE = new NodeCache({ stdTTL: 60 * 60 * 12 });
async function doFetch(url: string, request: RequestInit) { async function doFetch(url: string, request: RequestInit) {
sanitizeRequestArgs(url, request); sanitizeRequestArgs(url, request);
@ -47,38 +51,186 @@ function sanitizeRequestArgs(url: string, request: RequestInit) {
}); });
} }
interface ConsensusRequest extends RequestInit {
path: string;
}
interface ExecutionRequest { interface ExecutionRequest {
method: string; method: string;
params: string; params: any[];
} }
interface ConsensusCommitteeHashesRequest {
start: number;
count: number;
}
interface ConsensusCommitteePeriodRequest {
period: number | "latest";
}
interface ConsensusBlockRequest {
block: number;
}
let client: Client;
const plugin: Plugin = { const plugin: Plugin = {
name: "eth", name: "eth",
async plugin(api: PluginAPI): Promise<void> { async plugin(api: PluginAPI): Promise<void> {
api.registerMethod("consensus_request", { const prover = new Prover(CONSENSUS_RPC_URL);
const store = new MemoryStore();
client = new Client(prover, store, CONSENSUS_RPC_URL);
await client.sync();
api.registerMethod("consensus_committee_hashes", {
cacheable: false, cacheable: false,
async handler(request: ConsensusRequest): Promise<object> { async handler(
const consensusUrl = new URL(CONSENSUS_RPC_URL); request: ConsensusCommitteeHashesRequest
): Promise<Uint8Array> {
if (!(request?.start && typeof request.start == "number")) {
throw new Error('start required and must be a number"');
}
if (!(request?.count && typeof request.count == "number")) {
throw new Error('count required and must be a number"');
}
let dummyUrl = new URL( if (!client.isSynced) {
`http://dummy/${request.path.replace(/^\/+/, "")}` await client.sync();
); }
consensusUrl.pathname = dummyUrl.pathname;
consensusUrl.search = dummyUrl.search;
return doFetch(consensusUrl.toString(), request); let hashes;
try {
hashes = store.getCommitteeHashes(request.start, request.count);
} catch {
await client.sync();
}
if (!hashes) {
try {
hashes = store.getCommitteeHashes(request.start, request.count);
} catch (e) {
return e;
}
}
return hashes;
}, },
}); });
api.registerMethod("consensus_committee_period", {
cacheable: false,
async handler(
request: ConsensusCommitteePeriodRequest
): Promise<Uint8Array> {
if (
!(
request?.period &&
(typeof request.period == "number" || request.period === "latest")
)
) {
throw new Error('period required and must be a number or "latest"');
}
if (!client.isSynced) {
await client.sync();
}
let committee;
try {
committee = store.getCommittee(
request.period === "latest" ? client.latestPeriod : request.period
);
} catch {
await client.sync();
}
if (!committee) {
try {
committee = store.getCommittee(
request.period === "latest" ? client.latestPeriod : request.period
);
} catch (e) {
return e;
}
}
return committee;
},
});
api.registerMethod("execution_request", { api.registerMethod("execution_request", {
cacheable: false, cacheable: false,
async handler(request: ExecutionRequest): Promise<object> { async handler(request: ExecutionRequest): Promise<object> {
return doFetch(EXECUTION_RPC_URL, { const tempRequest = {
method: "POST", method: request.method,
body: JSON.stringify(request), ...request.params,
}); };
const hash = api.util.crypto
.createHash(stringify(tempRequest))
.toString("hex");
if (RPC_CACHE.has(hash)) {
RPC_CACHE.ttl(hash);
return RPC_CACHE.get(hash);
}
try {
let resp = await doFetch(EXECUTION_RPC_URL, {
method: "POST",
body: JSON.stringify(request),
});
if (resp && resp.result) {
RPC_CACHE.set(hash, resp);
}
return resp;
} catch (e) {
return e;
}
},
});
api.registerMethod("consensus_optimistic_update", {
cacheable: false,
async handler(): Promise<object> {
return await doFetch(
`${CONSENSUS_RPC_URL}/eth/v1/beacon/light_client/optimistic_update`,
{
method: "GET",
}
);
},
});
api.registerMethod("consensus_block", {
cacheable: false,
async handler(request: ConsensusBlockRequest): Promise<object> {
try {
BigInt(request?.block);
} catch {
throw new Error("block is required and must be a number");
}
const block = request?.block;
if (BigInt(block) > BigInt(client.latestPeriod)) {
await client.sync();
}
if (!client.blockHashCache.has(request.block)) {
throw new Error("block not found");
}
if (client.blockCache.has(request.block)) {
client.blockCache.ttl(request.block);
return client.blockCache.get(request.block);
}
await client.getExecutionFromBlockRoot(
request.block as any,
client.blockHashCache.get(request.block)
);
return client.blockCache.get(request.block);
}, },
}); });
}, },