simulate-callback.js•7.16 kB
/**
* Simulate callback scenarios for testing
*/
/**
* Generate mock callback payload
* @param {string} transactionId - Transaction ID
* @param {string} status - Transaction status (CONFIRMED, DECLINED, FAILED, EXPIRED, CANCELLED)
* @param {Object} options - Additional options
* @returns {Object} Mock callback payload
*/
export function generateMockCallback(transactionId, status = 'CONFIRMED', options = {}) {
const {
amount = '57.60',
currency = 'EUR',
payerAmount = null,
payeeAmount = null,
statusMessage = null,
passbackParams = null
} = options;
// Calculate fee like Java implementation: |payerAmount - amount| or |payeeAmount - amount|
const transactionAmount = parseFloat(amount);
let fee = '0.00';
if (payerAmount !== null) {
fee = Math.abs(parseFloat(payerAmount) - transactionAmount).toFixed(2);
} else if (payeeAmount !== null) {
fee = Math.abs(parseFloat(payeeAmount) - transactionAmount).toFixed(2);
}
const currentTime = Date.now();
const basePayload = {
callbackType: 'TRANSACTION_FINALIZED',
transactionId,
passbackParams,
amount,
fee,
currency,
status,
statusMessage,
created: currentTime - 300000, // Created 5 minutes ago (milliseconds)
...(status !== 'EXPIRED' && { finalized: currentTime })
};
// Add status-specific statusMessage
switch (status) {
case 'CONFIRMED':
return {
...basePayload,
statusMessage: statusMessage || 'Transaction confirmed'
};
case 'DECLINED':
return {
...basePayload,
statusMessage: statusMessage || 'Insufficient funds'
};
case 'FAILED':
return {
...basePayload,
statusMessage: statusMessage || 'Payment processing failed'
};
case 'EXPIRED':
return {
...basePayload,
statusMessage: statusMessage || 'Transaction expired',
finalized: undefined // Remove finalized for expired transactions
};
case 'CANCELLED':
return {
...basePayload,
statusMessage: statusMessage || 'Transaction cancelled'
};
default:
return basePayload;
}
}
/**
* Simulate callback delivery
* @param {string} callbackUrl - URL to send callback to
* @param {Object} payload - Callback payload
* @returns {Object} Simulation result
*/
export async function simulateCallbackDelivery(callbackUrl, payload) {
if (!callbackUrl || !callbackUrl.startsWith('http')) {
return {
success: false,
error: 'Invalid callback URL provided'
};
}
// In a real implementation, this would actually send HTTP POST
// For simulation, we just return what would be sent
return {
success: true,
url: callbackUrl,
payload,
headers: {
'Content-Type': 'application/json',
'Authorization': 'Bearer mock-jwt-token-' + Date.now()
},
simulatedAt: new Date().toISOString(),
note: 'This is a simulation - no actual HTTP request was made. Real payware callbacks use JWT tokens in Authorization header.'
};
}
/**
* Simulate callback tool implementation
*/
export const simulateCallbackTool = {
name: "payware_operations_simulate_callback",
description: "Simulate callback scenarios for testing webhook handling",
inputSchema: {
type: "object",
properties: {
transactionId: {
type: "string",
description: "Transaction ID to simulate callback for"
},
status: {
type: "string",
enum: ["CONFIRMED", "DECLINED", "FAILED", "EXPIRED", "CANCELLED"],
description: "Transaction status to simulate",
default: "CONFIRMED"
},
callbackUrl: {
type: "string",
description: "URL where callback would be sent (for simulation only)",
format: "uri"
},
amount: {
type: "string",
description: "Transaction amount (e.g., '57.60')",
default: "57.60"
},
currency: {
type: "string",
enum: ["EUR", "USD", "GBP"],
description: "Transaction currency",
default: "EUR"
},
fee: {
type: "string",
description: "Fee amount charged by payment institution (e.g., '0.00' for no fee)",
default: "0.00"
},
statusMessage: {
type: "string",
description: "Custom status message for the transaction callback"
}
},
required: ["transactionId"],
additionalProperties: false
},
async handler(args) {
const {
transactionId,
status = 'CONFIRMED',
callbackUrl,
amount = '57.60',
currency = 'EUR',
fee = '0.00',
statusMessage
} = args;
if (!transactionId) {
throw new Error("Transaction ID is required");
}
// Generate mock callback payload
const payload = generateMockCallback(transactionId, status, {
amount,
currency,
fee,
statusMessage
});
// Simulate callback delivery if URL provided
let deliveryResult = null;
if (callbackUrl) {
deliveryResult = await simulateCallbackDelivery(callbackUrl, payload);
}
const statusEmojis = {
'CONFIRMED': '✅',
'DECLINED': '❌',
'FAILED': '💥',
'EXPIRED': '⏰',
'CANCELLED': '🚫'
};
const statusEmoji = statusEmojis[status] || '❓';
return {
content: [{
type: "text",
text: `🔄 **Callback Simulation Complete**
**Transaction:** ${transactionId}
**Simulated Status:** ${statusEmoji} ${status}
**Mock Callback Payload:**
\`\`\`json
${JSON.stringify(payload, null, 2)}
\`\`\`
${deliveryResult ? `
**Callback Delivery Simulation:**
${deliveryResult.success ? '✅ Callback would be delivered successfully' : '❌ Callback delivery would fail'}
**Delivery Details:**
- URL: ${deliveryResult.url || 'N/A'}
- Headers: ${JSON.stringify(deliveryResult.headers || {}, null, 2)}
- Simulated At: ${deliveryResult.simulatedAt || 'N/A'}
**Note:** ${deliveryResult.note || 'No actual HTTP request was made'}
` : '**No callback URL provided** - only payload generated'}
**Status Explanations:**
- ✅ **CONFIRMED**: Successfully finalized
- ❌ **DECLINED**: Declined by the user, processing or finalizing payment institutions
- 💥 **FAILED**: Failed due to technical reasons or other
- ⏰ **EXPIRED**: Time to live of the transaction has passed
- 🚫 **CANCELLED**: Transaction canceled by the originator
**Integration Testing:**
1. Use this payload to test your callback handler
2. Verify your system processes each status correctly
3. Check error handling for DECLINED/FAILED statuses
4. Ensure proper logging and monitoring
**Next Steps:**
1. Implement callback endpoint to receive this payload
2. Test with different status scenarios
3. Add signature verification in production
4. Set up proper error handling and retry logic`
}]
};
}
};