import { type PublicClient } from "viem";
import { type SupportedChain } from "../types/index.js";
/**
 * Get (or lazily create) a viem PublicClient for the given chain.
 * Throws RpcConfigError if the chain has no RPC configured.
 */
export declare function getClient(chain: SupportedChain): PublicClient;
/**
 * Verify the RPC endpoint actually speaks the chain we think it does. A wrong-
 * chain RPC would happily sign "ETH" txs against (say) a fork or BSC — values
 * and addresses overlap but token semantics don't, and the user would end up
 * sending real ETH against what they thought was a testnet. We do this on the
 * first live call per chain, memoize it, and throw loud if it mismatches.
 */
export declare function verifyChainId(chain: SupportedChain): Promise<void>;
/** Invalidate the cached clients — useful after the user re-runs setup. */
export declare function resetClients(): void;