import { AccountId } from 'caip';
import { PublicClient } from 'viem';
import { EvmAddress, BalanceResult, TokenDetails } from './types';
/**
 * Get the native currency balance for an account.
 * @param client - PublicClient for the chain
 * @param accountId - Account ID (CAIP-10 format) containing chain and address
 * @returns Balance result with balance, decimals, and symbol from the chain's native currency
 */
export declare function getNativeBalance(client: PublicClient, accountId: AccountId): Promise<BalanceResult>;
/**
 * Get an ERC-20 token balance for an account.
 *
 * `decimals` and `symbol` are immutable token properties cached per (client, token)
 * pair. The cache holds the in-flight Promise so concurrent callers that arrive
 * before the first fetch settles share one set of two RPC calls (decimals + symbol)
 * rather than each firing three. Each caller always issues its own `balanceOf` read.
 * Call cost: first pass N accounts → N+2 calls; subsequent passes → N calls.
 *
 * Throws on invalid addresses or failed contract calls.
 * @param client - PublicClient for the chain
 * @param accountId - Account ID (CAIP-10 format) containing chain and address
 * @param token - Token address
 * @returns Token balance result with balance, decimals, and symbol
 */
export declare function getErc20TokenBalanceByChain(client: PublicClient, accountId: AccountId, token: EvmAddress): Promise<BalanceResult>;
/**
 * Reads ERC-20 token details from a contract.
 * Uses four parallel reads via Promise.all.
 * Throws on invalid addresses or failed contract calls.
 *
 * @param client - PublicClient for the chain
 * @param tokenAddress - Token contract address
 * @returns Token details including name, symbol, decimals, and totalSupply
 */
export declare function getErc20TokenDetails(client: PublicClient, tokenAddress: EvmAddress): Promise<TokenDetails>;