import type { EvmReadProvider, EvmWriteProvider, Hex } from "../types/evm.js";
import { type FeeOverrides } from "../utils/fees.js";
import { StealthCanisterClient } from "../ic/client.js";
import { PreparedPrivateSend, PrivateSendResult } from "../types.js";
/**
 * Parameters for preparing a private send.
 *
 * This derives a payment advice and burn address, then encrypts an announcement
 * for the recipient using the ICP stealth messaging layer.
 */
export interface PreparePrivateSendParams {
    /** ICP stealth client used to derive recipient keys and submit announcements. */
    client: StealthCanisterClient;
    /** Recipient EVM address (0x-prefixed, 20 bytes). */
    recipientAddress: string;
    /** Recipient chain ID (EVM chain ID). */
    recipientChainId: number | bigint;
    /** 32-byte seed as 0x-hex string. */
    seedHex: string;
    /** Optional 32-byte payment advice ID. If omitted, a random ID is generated. */
    paymentAdviceIdHex?: string;
    /** RNG override used when generating a payment advice ID. */
    randomBytes?: (length: number) => Uint8Array;
    /** VetKD key ID name for offchain public key derivation (e.g. "key_1" or "test_key_1") */
    vetkdKeyIdName?: string;
}
/**
 * Prepare a private send announcement.
 *
 * @returns Artifacts needed to submit the announcement and later redeem it.
 * @throws Error if `seedHex` / `paymentAdviceIdHex` is not 32 bytes.
 */
export declare function preparePrivateSend(params: PreparePrivateSendParams): Promise<PreparedPrivateSend>;
export interface SubmitPrivateSendParams {
    /** ICP stealth client. */
    client: StealthCanisterClient;
    /** Output of `preparePrivateSend`. */
    preparation: PreparedPrivateSend;
    /** Optional storage tag. */
    tag?: string;
}
/**
 * Submit a prepared private send announcement to the storage canister.
 *
 * @returns The stored announcement and the same preparation metadata.
 */
export declare function submitPrivateSendAnnouncement(params: SubmitPrivateSendParams): Promise<PrivateSendResult>;
/**
 * Parameters for {@link submitPrivateSendTransfer}.
 */
export interface SubmitPrivateSendTransferParams {
    /** EVM write provider (e.g. wallet client). */
    writeProvider: EvmWriteProvider;
    /** Token contract address. */
    tokenAddress: string;
    /** Burn address generated by `preparePrivateSend`. */
    burnAddress: string;
    /** Amount in the token's smallest unit. */
    amount: bigint;
    /** Optional fee overrides from `buildFeeOverrides`. */
    feeOverrides?: FeeOverrides;
    /**
     * EVM read provider for awaiting the receipt.
     * Falls back to `writeProvider` if it exposes `waitForTransactionReceipt`.
     */
    readProvider?: EvmReadProvider;
}
/**
 * Execute an ERC-20 `transfer` to the burn address and wait for the receipt.
 *
 * This is the final on-chain step of a private send, after the announcement
 * has been prepared and submitted.
 *
 * @returns The confirmed transaction hash.
 */
export declare function submitPrivateSendTransfer(params: SubmitPrivateSendTransferParams): Promise<{
    transactionHash: Hex;
}>;
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