/**
 * UserOp Builder — ERC-4337 v0.7 packed UserOp construction
 *
 * Pattern from: cross-chain-atomic-routing/scripts/base-volume-loop-gasless-v2.ts:462
 *
 * Builds the packed UserOp format for ERC-4337 v0.7:
 *   - accountGasLimits = bytes32(verificationGasLimit(16) | callGasLimit(16))
 *   - gasFees = bytes32(maxPriorityFeePerGas(16) | maxFeePerGas(16))
 *   - paymasterAndData = paymaster(20) + pmVerificationGas(16) + pmPostOpGas(16) + timeEncoding + signature
 */
export declare const GAS_LIMITS: {
    /** Gas for the main execution (approve + swap via AA) */
    readonly CALL_GAS_LIMIT: 1500000n;
    /** Gas for signature verification */
    readonly VERIFICATION_GAS_LIMIT: 500000n;
    /** Pre-verification gas (covers calldata cost) */
    readonly PRE_VERIFICATION_GAS: 150000n;
    /** Paymaster verification gas */
    readonly PM_VERIFICATION_GAS_LIMIT: 300000n;
    /** Paymaster post-op gas */
    readonly PM_POST_OP_GAS_LIMIT: 150000n;
};
export interface PackedUserOp {
    sender: string;
    nonce: bigint;
    initCode: string;
    callData: string;
    accountGasLimits: string;
    preVerificationGas: bigint;
    gasFees: string;
    paymasterAndData: string;
    signature: string;
}
export interface BuildUserOpParams {
    sender: string;
    nonce: bigint;
    initCode: string;
    callData: string;
    maxFeePerGas?: bigint;
    maxPriorityFeePerGas?: bigint;
}
/**
 * Build a packed UserOp (ERC-4337 v0.7 format).
 *
 * Gas limits use proven defaults from the volume loop.
 * paymasterAndData and signature are empty — fill with signPaymaster() and owner sign.
 */
export declare function buildUserOp(params: BuildUserOpParams): PackedUserOp;
/**
 * Compute the UserOp hash per ERC-4337 v0.7 packed format.
 *
 * hash = keccak256(abi.encode(
 *   keccak256(packedUserOp),
 *   entryPoint,
 *   chainId
 * ))
 */
export declare function computeUserOpHash(userOp: PackedUserOp, chainId: number): string;
/**
 * Sign UserOp with the VerifyingPaymaster.
 *
 * Produces paymasterAndData with layout:
 *   [0:20]    paymaster address
 *   [20:36]   pmVerificationGasLimit (uint128)
 *   [36:52]   pmPostOpGasLimit (uint128)
 *   [52:116]  abi.encode(validUntil, validAfter) (64 bytes)
 *   [116:181] ECDSA signature (65 bytes)
 */
export declare function signPaymaster(userOp: PackedUserOp, paymasterSignerKey: string, chainId: number): {
    paymasterAndData: string;
};