/**
 * Nado wire encodings: bytes32 subaccount ids and x18 ↔ native-decimal
 * amount scaling.
 *
 * @see {@link https://docs.nado.xyz/developer-resources/api/gateway/signing/examples | Nado signing examples}
 * @see {@link https://docs.nado.xyz/developer-resources/api/gateway/queries#amounts-and-prices | Nado amounts & prices (x18 convention)}
 */
import { type Address, type Hex } from 'viem';
/**
 * Nado subaccount id: 20-byte owner address ++ 12-byte ascii name,
 * zero-padded right. Every wallet's primary subaccount is named `default`
 * (auto-assigned on first interaction) — the empty name is a different subaccount.
 */
export declare function buildNadoSubaccountId(owner: Address, name?: string): Hex;
/**
 * x18 query amount → raw base units. Floors — never rounds up — so a
 * converted `max_withdrawable` can't exceed the true maximum. Same semantics
 * as Nado's own frontend, which floors at submit (`BigNumber.ROUND_DOWN`).
 *
 * Takes a bigint so it cannot throw: parsing a gateway string stays at the one
 * boundary that receives it (`safeBigInt`).
 */
export declare function x18ToRawBaseUnit(x18Amount: bigint, decimals: number): bigint;
/** x18-scaled query amount → human token units, floored at native decimals. */
export declare function x18ToTokenUnits(x18Amount: bigint, decimals: number): string;
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