import { type MarketInput } from "@morpho-org/midnight-sdk";
import { type Address } from "viem";
import { type Metadata, type MidnightSupplyCollateralAction, type Transaction } from "../../types/index.js";
/** Parameters for encoding a direct Midnight collateral supply. */
export interface MidnightSupplyCollateralParams {
    readonly chainId: number;
    readonly market: MarketInput;
    readonly collateralIndex?: bigint;
    readonly assets: bigint;
    readonly onBehalf: Address;
    readonly metadata?: Metadata;
}
/**
 * Encodes a direct Midnight collateral supply.
 *
 * Use this low-level builder when a flow already knows the market, collateral
 * index, and approval state. App flows should usually call
 * `client.morpho.midnight(chainId).supplyCollateral(...)`, which resolves the
 * ERC20 approval requirement before exposing `buildTx`.
 *
 * @param params.chainId - Chain id used to resolve `Midnight`.
 * @param params.market - Midnight market receiving collateral.
 * @param params.collateralIndex - Optional collateral index; defaults to `0n`.
 * @param params.assets - Collateral assets to supply.
 * @param params.onBehalf - Account whose collateral balance increases.
 * @param params.metadata - Optional analytics metadata appended to calldata.
 * @returns A deep-frozen `Transaction<MidnightSupplyCollateralAction>` targeting `Midnight`.
 * @throws {NonPositiveInputError} when `assets <= 0n`.
 * @throws {ChainIdMismatchError} when the market targets another chain.
 * @throws {MidnightMarketAddressMismatchError} when the market targets another Midnight deployment.
 * @throws {UnknownCollateralIndexError} when `collateralIndex` is not configured on the market.
 * @example
 * ```ts
 * import { midnightSupplyCollateral } from "@morpho-org/morpho-sdk";
 *
 * const tx = midnightSupplyCollateral({
 *   chainId: 8453,
 *   market: marketData.params,
 *   collateralIndex: 0n,
 *   assets: 2_000_000n,
 *   onBehalf: user,
 * });
 * ```
 */
export declare const midnightSupplyCollateral: (params: MidnightSupplyCollateralParams) => Readonly<Transaction<MidnightSupplyCollateralAction>>;