/**
 * Build Shield Transaction - Returns unsigned transaction data
 *
 * This function builds the shield transaction without sending it,
 * allowing for gasless relay where the relayer broadcasts the signed tx.
 */
import type { SupportedToken } from './local-config';
export interface BuildShieldOptions {
    invoicePrivateKey: string;
    amount: string;
    token: SupportedToken;
    network?: 'mainnet' | 'testnet';
    chainId?: number;
    rpcUrl?: string;
}
export interface ShieldTransactionData {
    approveTx?: {
        to: string;
        data: string;
        nonce: number;
        gasLimit: bigint;
        gasPrice: bigint;
    };
    shieldTx: {
        to: string;
        data: string;
        value: bigint;
        nonce: number;
        gasLimit: bigint;
        gasPrice: bigint;
    };
    railgunAddress: string;
    tokenAddress: string;
    amountWei: bigint;
}
/**
 * Build shield transaction data without sending
 * Returns unsigned transaction data that can be signed offline and broadcast by a relayer
 */
export declare function buildShieldTransaction(options: BuildShieldOptions): Promise<ShieldTransactionData>;
/**
 * Sign and serialize a transaction for relay
 */
export declare function signTransactionForRelay(invoicePrivateKey: string, tx: {
    to: string;
    data: string;
    value?: bigint;
    nonce: number;
    gasLimit: bigint;
    gasPrice: bigint;
}, chainId?: number): Promise<string>;
export interface ShieldCalldataResult {
    approveCall: {
        to: string;
        value: string;
        data: string;
    };
    shieldCall: {
        to: string;
        value: string;
        data: string;
    };
    railgunAddress: string;
    tokenAddress: string;
    balance: string;
}
/**
 * Build shield calldata for use in a UserOp
 *
 * This is used for Smart Wallet invoices where the shield operation
 * is executed via ERC-4337 UserOp with paymaster sponsorship.
 *
 * Returns the approve and shield call data that will be batched in the UserOp.
 */
export declare function buildShieldCalldata(invoicePrivateKey: string, token: SupportedToken, network?: 'mainnet' | 'testnet', rpcUrl?: string, smartWalletAddress?: string, // For smart invoices, tokens are at this address
amount?: string, // Specific amount to shield (if not provided, shields full balance)
chainIdOverride?: number): Promise<ShieldCalldataResult>;