import { EthqlServiceDefinition, Options } from '@ethql/base';
import Web3 = require('web3');
declare module '@ethql/base' {
    interface EthqlServices {
        web3: Web3;
    }
    interface EthqlServiceDefinitions {
        web3: EthqlServiceDefinition<{}, Web3>;
    }
}
/**
 * Initializes the web3 client object.
 *
 * @param uri URI of the JSON-RPC endpoint. Supported transports: HTTP(S), WS(S), IPC.
 * @return A thunk that, when called, returns a web3 instance for the request.
 */
export declare function initWeb3(config: Options): () => Web3;
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