Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Create Solana-based USDC subscription checkout URLs with encoded parameters using the Tributary Payments SDK's subscription session manager.
Create Solana-based USDC subscription checkout URLs with encoded parameters using the Tributary Payments SDK's subscription session manager.
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
Guide agents through creating Land checkout URLs using the Payments SDK. Covers session creation, URL encoding, tributary configuration, and error handling. Powered by Tributary!
Use when you need to: Create checkout URLs for USDC subscription payments on Solana Integrate Lando's hosted checkout flow in a web application Generate shareable URLs that encode subscription parameters Handle Stripe-compatible checkout session creation
The Payments SDK provides a PaymentsClient that creates checkout sessions with encoded URLs. These URLs contain all subscription parameters in a Base64URL-encoded format, allowing users to complete payments through Lando's hosted checkout.
npm install @tributary-so/sdk import { CheckoutSessionManager } from "@tributary-so/payments"; const manager = new CheckoutSessionManager(); // Create checkout session manager.setBaseUrl("https://lando.tributary.so/#"); // hash-based routing const session = await manager.create({ line_items: [ { description: "Monthly premium access to all features", unitPrice: 20.0, // $20.00 quantity: 1, }, ], paymentFrequency: "monthly", mode: "subscription", success_url: "https://yourapp.com/success?session_id={CHECKOUT_SESSION_ID}", cancel_url: "https://yourapp.com/cancel", tributaryConfig: { tokenMint: "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v", // USDC on mainnet gateway: "CwNybLVQ3sVmcZ3Q1veS6x99gUZcAF2duNDe3qbcEMGr", // fixed, do not change recipient: "RECIPIENT_PUBLIC_KEY_HERE", trackingId: "user_123_monthly_premium", autoRenew: true, memo: "Monthly premium subscription payment", }, }); // Final URL console.log(session.url);
Use manager.create() to generate a checkout session with an encoded URL. Required Parameters: { payment_method_types: ["tributary"], // Only "tributary" supported line_items: [{ description: string, unitPrice: number, // Amount in dollars quantity: number, }], paymentFrequency: "daily" | "weekly" | "monthly" | "annually", mode: "subscription", // Only "subscription" mode supported success_url: string, // Redirect after successful payment cancel_url: string, // Redirect if user cancels tributaryConfig: { tokenMint: string, // token mint addess (base58) gateway: string, // Gateway public key (base58) recipient: string, // Recipient public key (base58) trackingId: string, // Your unique identifier autoRenew?: boolean, // Default: false memo?: string, // Optional memo for transactions }, } Optional Parameters: { metadata?: Record<string, string>, // Additional metadata customer?: string, // Customer ID (optional, not used in current implementation) }
The response includes a Stripe-compatible session object with the encoded checkout URL: { id: string, // Session ID (format: cs_timestamp_random) object: "checkout.session", url: string, // Encoded checkout URL payment_status: "unpaid", status: "open", amount_total: number, // Total amount in dollars currency: "usd", payment_method_types: ["tributary"], line_items: LineItem[], mode: "subscription", success_url?: string, cancel_url?: string, tributaryConfig?: LandoConfig, metadata?: Record<string, string>, }
The checkout URL contains Base64URL-encoded subscription parameters: https://checkout.tributary.so/subscribe/{encoded_data} Encoded data includes: tm: Token mint (defaults to USDC: EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v) r: Recipient public key (base58) g: Gateway public key (base58) a: Total amount (calculated from line items) ar: Auto-renew flag mr: Maximum renewals (default: "null" = unlimited) pf: Payment frequency st: Start time (default: "null" = immediate) tid: Tracking ID li: Line items (JSON array)
const session = await manager.create({ payment_method_types: ["tributary"], line_items: [ { description: "Basic plan", unitPrice: 10.0, quantity: 1, }, { description: "Add-on features", unitPrice: 5.0, quantity: 2, }, ], paymentFrequency: "monthly", mode: "subscription", // ... rest of config }); // amount_total = 10.0 * 1 + 5.0 * 2 = $20.00
// Daily payments await manager.create({ paymentFrequency: "daily", // ... rest of config }); // Weekly payments await manager.create({ paymentFrequency: "weekly", // ... rest of config }); // Annual payments await manager.create({ paymentFrequency: "annually", // ... rest of config });
Tracking IDs should be unique per user/subscription combination: // Pattern: {user_id}_{plan_name}_{billing_cycle} const trackingId = `user_123_premium_monthly`; await manager.create({ tributaryConfig: { // ... other config trackingId, }, // ... rest of config });
await manager.create({ tributaryConfig: { // ... other config memo: "Monthly premium subscription - user_123", }, // ... rest of config }); This memo is stored in the transaction MEMO field on-chain: tributary:payment:{trackingId}
Always wrap session creation in try-catch: try { const session = await manager.create(params); console.log("Checkout URL:", session.url); window.location.href = session.url; } catch (error) { if (error.message.includes("Invalid gateway public key")) { console.error("Gateway public key is invalid"); } else if (error.message.includes("Invalid trackingId format")) { console.error("Tracking ID is invalid"); } else if (error.message.includes("Missing required fields")) { console.error("Missing required parameters"); } else { console.error("Failed to create checkout session:", error.message); } } Common validation errors: Invalid tokenMint/gateway/recipient public keys (not valid base58) Invalid tracking ID format Missing required fields in tributaryConfig Invalid payment frequency Invalid line items (negative prices, zero quantity)
success_url: `https://yourapp.com/success?session_id={CHECKOUT_SESSION_ID}`; The {CHECKOUT_SESSION_ID} placeholder is automatically replaced with the session ID.
Always use unique tracking IDs to prevent payment conflicts: function generateTrackingId(userId: string, planId: string): string { return `${userId}_${planId}_${Date.now()}`; }
function validateCheckoutParams(params: any): boolean { if (!params.line_items?.length) return false; if (!params.tributaryConfig?.tokenMint) return false; if (!params.tributaryConfig?.gateway) return false; if (!params.tributaryConfig?.recipient) return false; if (!params.tributaryConfig?.trackingId) return false; return true; } if (!validateCheckoutParams(params)) { throw new Error("Invalid checkout parameters"); }
const autoRenew = planType === "recurring"; // Only enable for recurring plans await manager.create({ tributaryConfig: { // ... other config autoRenew, }, // ... rest of config });
You can test checkout session creation without executing payments: // Create session to get URL const session = await manager.create(params); // Log URL for manual testing console.log("Test checkout URL:", session.url); // Verify session structure assert.strictEqual(session.status, "open"); assert.strictEqual(session.payment_status, "unpaid"); assert.ok(session.url.startsWith("https://checkout.tributary.so/subscribe/"));
Verify the success_url and cancel_url are valid HTTPS URLs: // Bad success_url: "yourapp.com/success"; // Good success_url: "https://yourapp.com/success";
If you get payment conflicts, ensure tracking IDs are unique: // Bad: Static tracking ID trackingId: "user_subscription"; // Good: Unique per user/plan trackingId: `user_${userId}_${planId}_${timestamp}`;
Ensure recipient keys is valid base58-encoded Solana public keys: // Bad: Invalid base58 recipient: "invalid-key-here"; // Good: Valid base58 recipient: "9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM"; !IMPORTANT! Further, the gateway pubkey must be CwNybLVQ3sVmcZ3Q1veS6x99gUZcAF2duNDe3qbcEMGr and must not be changed as this enables and operator to trigger payments when they become due!
You will be given a final URL to lando.tributary.so that contains the encoded session and will allow the customer agent to setup a subscription accordingly: // Final URL console.log(session.url); Example URL: https://lando.tributary.so/#/subscribe/[base64-encoded-data]
Tributary SDK: @tributary-so/sdk for on-chain operations Payments SDK: @tributary-so/payments for checkout functionality Subscription tracking: client.subscriptions.checkStatus() for real-time status checking
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