/**
 * Shared EIP-2612 Variant-D payment builder.
 *
 * Extracted from `commands/call.ts` so `pipeline call` signs permits with the
 * exact same code path as `call` (skills). Keeping one implementation matters:
 * if the two drifted, a purchase could pass for skills and fail for pipelines,
 * or vice versa, for reasons invisible in either test suite.
 *
 * Server contract (`/v1/skills/:id/invoke` and `/v1/pipelines/:id/invoke` both):
 *   1. Call without `payment` → 402 `{ mode: 'eip2612_permit_variant_d', ... }`
 *      carrying token/chain/recipients/amounts.
 *   2. Sign a Permit over the 402 fields and retry with `{ payment }`.
 *
 * The permit value is the TOTAL charged (rent, not token cost — the server
 * settles the token/compute difference from its own accounting afterwards).
 */
import { Wallet } from 'ethers';
export interface PermitD402 {
    code: 'PAYMENT_REQUIRED';
    mode: 'eip2612_permit_variant_d';
    skill_id: string;
    price_usdc: number;
    commission_bps: number;
    author_recipient: string;
    treasury_recipient: string;
    amount_to_author: string;
    amount_to_treasury: string;
    operator_address: string;
    token_address: string;
    chain_id: number;
    permit_deadline_recommended: number;
}
export interface Eip2612Permit {
    owner: string;
    spender: string;
    value: string;
    nonce: number;
    deadline: string;
    v: number;
    r: string;
    s: string;
}
export interface VariantDPayment {
    asset_id: string;
    permit: Eip2612Permit;
    author_recipient: string;
    treasury_recipient: string;
    amount_to_author: string;
    amount_to_treasury: string;
    shared_link: string;
}
export declare function isPermitD402(body: unknown): body is PermitD402;
export declare function sharedLinkFromPermit(permitNonce: number, assetId: string, buyerAddress: string, operatorAddress: string): string;
/**
 * Sign a Permit for the given 402 challenge and return a retry `payment` body.
 *
 * `assetId` must be the id the server addressed (pipeline id or skill id); the
 * server validates asset_id against the route parameter, and the shared_link is
 * derived from it, so a mismatch is rejected fail-closed.
 */
export declare function buildVariantDPayment(challenge: PermitD402, assetId: string, buyerAddress: string, wallet: Wallet): Promise<VariantDPayment>;