import { SessionTypes } from '@walletconnect/types';
import { Namespace, NamespaceConfig } from '../types';
export declare function getRpcUrl(chainId: string, rpc: Namespace, projectId?: string): string | undefined;
export declare function getChainId(chain: string): number;
export declare function validateChainApproval(chain: string, chains: string[]): void;
export declare function getChainsFromApprovedSession(accounts: string[]): string[];
export declare function getAccountsFromSession(namespace: string, session: SessionTypes.Struct): string[];
export declare function mergeRequiredOptionalNamespaces(required: NamespaceConfig, optional?: NamespaceConfig): NamespaceConfig;
export declare function normalizeNamespaces(namespaces: NamespaceConfig): NamespaceConfig;
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