@bit-gpt/h402/dist/verify/useFacilitator.js

BitGPT's 402 open protocol for blockchain-native payments

import { toJsonSafe } from "../shared";
const DEFAULT_FACILITATOR_URL = "https://facilitator.bitgpt.xyz";
/**
 * Creates a facilitator client for interacting with the h402 payment facilitator service
 *
 * @param facilitator - The facilitator config to use. If not provided, the default facilitator will be used.
 * @returns An object containing verify and settle functions for interacting with the facilitator
 */
export function useFacilitator(facilitator) {
    /**
     * Verifies a payment payload with the facilitator service
     *
     * @param payload - The payment payload to verify (base64 encoded)
     * @param paymentRequirements - The payment requirements to verify against
     * @returns A promise that resolves to the verification response
     */
    async function verify(payload, paymentRequirements) {
        console.log("[DEBUG-PAYMENT-FLOW] Making request to facilitator:", facilitator?.url);
        const url = facilitator?.url || DEFAULT_FACILITATOR_URL;
        let headers = { "Content-Type": "application/json" };
        if (facilitator?.createAuthHeaders) {
            const authHeaders = await facilitator.createAuthHeaders();
            headers = { ...headers, ...authHeaders.verify };
        }
        const res = await fetch(`${url}/verify`, {
            method: "POST",
            headers,
            body: JSON.stringify({
                payload,
                paymentRequirements: toJsonSafe(paymentRequirements),
            }),
        });
        if (res.status !== 200) {
            return {
                isValid: false,
                errorMessage: `Failed to verify payment: ${res.statusText}`
            };
        }
        const data = await res.json();
        return data;
    }
    /**
     * Settles a payment with the facilitator service
     *
     * @param payload - The payment payload to settle (base64 encoded)
     * @param paymentRequirements - The payment requirements for the settlement
     * @returns A promise that resolves to the settlement response
     */
    async function settle(payload, paymentRequirements) {
        console.log("[DEBUG-PAYMENT-FLOW] Making request to facilitator:", facilitator?.url);
        const url = facilitator?.url || DEFAULT_FACILITATOR_URL;
        let headers = { "Content-Type": "application/json" };
        if (facilitator?.createAuthHeaders) {
            const authHeaders = await facilitator.createAuthHeaders();
            headers = { ...headers, ...authHeaders.settle };
        }
        const res = await fetch(`${url}/settle`, {
            method: "POST",
            headers,
            body: JSON.stringify({
                payload,
                paymentRequirements: toJsonSafe(paymentRequirements),
            }),
        });
        if (res.status !== 200) {
            const text = res.statusText;
            throw new Error(`Failed to settle payment: ${res.status} ${text}`);
        }
        const data = await res.json();
        return data;
    }
    return { verify, settle };
}
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