import type { Address, Hex } from "viem";
/** Truncate `0xabcd1234...0001` style. Returns input unchanged if shorter than 12 chars. */
export declare function truncateAddress(addr: Address | string | null): string;
/** Format a gas bigint with locale-aware thousands separators. */
export declare function formatGas(gas: bigint): string;
/**
 * Format a wei value as a human-readable string with up to 18 decimals,
 * trimming trailing zeros. Returns null when the value is exactly 0n so
 * callers can hide the cell.
 */
export declare function formatWei(value: bigint, symbol?: string): string | null;
/** Extract a 4-byte function selector from calldata, or "(fallback)" for empty calldata. */
export declare function getFunctionSelector(input: Hex): string;
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