zkverifyjs/dist/esm/api/connection/index.js

Submit proofs to zkVerify and query proof state with ease using our npm package.

import { ApiPromise, WsProvider } from '@polkadot/api';
import { waitForNodeToSync, fetchRuntimeVersionFromProvider, } from '../../utils/helpers/index.js';
import { getZkvTypes, zkvRpc } from '../../config/index.js';
/**
 * Establishes a connection to the zkVerify blockchain by initializing the API and provider.
 *
 * @param config - NetworkConfig object containing details such as websocket and rpc urls.
 * @returns {Promise<EstablishedConnection>} The initialized API and provider.
 * @throws Will throw an error if the connection fails or if the provided configuration is invalid.
 */
export const establishConnection = async (config) => {
    const { host, websocket } = config;
    if (!websocket || websocket.trim() === '') {
        throw new Error(`WebSocket URL is required for network: ${host}`);
    }
    try {
        const wsOpts = config.wsProvider;
        const provider = wsOpts !== undefined
            ? new WsProvider(websocket, wsOpts.autoConnectMs, undefined, wsOpts.timeout)
            : new WsProvider(websocket);
        const runtimeSpec = await fetchRuntimeVersionFromProvider(provider);
        const api = await ApiPromise.create({
            provider,
            types: getZkvTypes(runtimeSpec),
            rpc: zkvRpc,
        });
        await waitForNodeToSync(api, { timeoutMs: config.syncTimeoutMs });
        return { api, provider, runtimeSpec };
    }
    catch (error) {
        if (error instanceof Error) {
            throw new Error(`Failed to establish connection to ${host}: ${error.message}`);
        }
        else {
            throw new Error('Failed to establish connection due to an unknown error.');
        }
    }
};
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