1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232# Progress: Connector Service
## Current Status
The Connector Service is currently in a production-ready state with limited connector support. It has been in production since January 2023 as part of the Hyperswitch platform.
### Implementation Progress
| Component | Status | Notes |
|-----------|--------|-------|
| gRPC Server | ✅ Complete | Fully implemented with support for all defined operations |
| Connector Integration Framework | ✅ Complete | Trait-based system ready for new connectors |
| Domain Types | ✅ Complete | Common data structures implemented for all flows |
| Client SDKs | 🟡 Partial | Basic SDKs available for Node.js, Python, and Rust |
| Documentation | 🟡 Partial | Core documentation available, some areas need expansion |
| Testing | 🟡 Partial | Basic tests implemented, coverage could be improved |
### Connector Support
| Connector | Status | Supported Operations |
|-----------|--------|---------------------|
| Adyen | ✅ Implemented | Authorization, Capture, Sale, Refunds, Disputes, Status, Webhooks |
| Razorpay | ✅ Implemented | Authorization, Capture, Sale, Refunds, Status, Webhooks |
| Stripe | ❌ Planned | - |
| PayPal | ❌ Planned | - |
| Checkout.com | ❌ Planned | - |
| Braintree | ❌ Planned | - |
| Authorize.net | ❌ Planned | - |
| JP Morgan | ❌ Planned | - |
| Bank of America | ❌ Planned | - |
| Fiserv | ❌ Planned | - |
| Wells Fargo | ❌ Planned | - |
| Global Payments | ❌ Planned | - |
| Elavon | ❌ Planned | - |
| Paytm | ❌ Planned | - |
| Phonepe | ❌ Planned | - |
| PayU | ❌ Planned | - |
| Billdesk | ❌ Planned | - |
### Payment Flow Support
| Payment Flow | Status | Notes |
|--------------|--------|-------|
| Authorization | ✅ Complete | Fully implemented |
| Capture | ✅ Complete | Fully implemented |
| Sale | ✅ Complete | Fully implemented |
| Refund | ✅ Complete | Fully implemented |
| Void | ✅ Complete | Fully implemented |
| Payment Sync | ✅ Complete | Fully implemented |
| Refund Sync | ✅ Complete | Fully implemented |
| Webhook Processing | ✅ Complete | Fully implemented |
| Mandate Setup | ✅ Complete | Fully implemented |
| Dispute Handling | ✅ Complete | Basic implementation, could be expanded |
### Payment Method Support
| Payment Method | Status | Notes |
|----------------|--------|-------|
| Credit/Debit Cards | ✅ Complete | Fully implemented |
| Digital Wallets | ❌ Planned | Apple Pay, Google Pay, etc. |
| Bank Transfers | ❌ Planned | ACH, SEPA, etc. |
| Buy Now Pay Later | ❌ Planned | Affirm, Klarna, etc. |
| UPI | ❌ Planned | Indian Unified Payments Interface |
| Crypto | ❌ Planned | Bitcoin, Ethereum, etc. |
## Known Issues
### Technical Debt
1. **Error Handling Consistency**
- **Issue**: Error handling is not entirely consistent across all components
- **Impact**: May lead to confusing error messages or incorrect error handling
- **Status**: In progress
2. **Type Conversion Complexity**
- **Issue**: The type conversion system between gRPC, domain, and connector types is complex
- **Impact**: Makes adding new features or connectors more difficult than necessary
- **Status**: Under review
3. **Documentation Gaps**
- **Issue**: Some areas of the codebase lack comprehensive documentation
- **Impact**: Makes it harder for new contributors to understand the system
- **Status**: Ongoing improvement
4. **Test Coverage**
- **Issue**: Some components have limited test coverage
- **Impact**: Increases risk of regressions when making changes
- **Status**: Ongoing improvement
### Functional Limitations
1. **Limited Connector Support**
- **Issue**: Only Adyen and Razorpay are currently implemented
- **Impact**: Limits the utility of the service for many potential users
- **Status**: Planned expansion
2. **Payment Method Restrictions**
- **Issue**: Limited support for alternative payment methods beyond cards
- **Impact**: Doesn't meet the needs of users in regions where alternative methods are common
- **Status**: Planned expansion
3. **Multi-step Flow Handling**
- **Issue**: Some complex payment flows require state management not built into the service
- **Impact**: Clients must handle state management for these flows
- **Status**: Under consideration
4. **Authentication Mechanism**
- **Issue**: No built-in authentication for client requests
- **Impact**: Requires external authentication solution
- **Status**: By design (service focuses on core functionality)
## Project Evolution
### Version History
| Version | Release Date | Major Features |
|---------|--------------|----------------|
| 0.1.0 | Q4 2022 | Initial prototype with basic gRPC server |
| 0.5.0 | Q4 2022 | First implementation of Adyen connector |
| 0.8.0 | Q4 2022 | Added Razorpay connector |
| 1.0.0 | Jan 2023 | First production release with core functionality |
| 1.1.0 | Q1 2023 | Improved error handling and webhook processing |
| 1.2.0 | Q2 2023 | Added mandate setup and dispute handling |
| 1.3.0 | Q3 2023 | Enhanced client SDKs and documentation |
| 1.4.0 | Q4 2023 | Performance optimizations and bug fixes |
| 1.5.0 | Q1 2024 | Improved type conversion system |
### Architectural Evolution
1. **Initial Design (Pre-1.0)**
- Basic gRPC server with limited connector support
- Simple type conversion system
- Limited error handling
2. **Production Release (1.0)**
- Complete gRPC server with support for all core payment operations
- Trait-based connector integration framework
- Improved type conversion system
- Enhanced error handling
3. **Current Architecture (1.5+)**
- Refined connector integration framework
- Comprehensive type conversion system
- Robust error handling
- Webhook standardization
- Support for advanced payment flows
4. **Future Direction**
- More modular connector implementation
- Enhanced type safety
- Improved performance
- Better developer experience
### Community Adoption
The Connector Service has seen adoption primarily through its inclusion in the Hyperswitch platform. As an open-source project, it has begun to attract:
1. **Users**: Organizations looking for a flexible payment integration solution
2. **Contributors**: Developers interested in adding support for additional payment processors
3. **Feedback**: Feature requests and bug reports from the community
### Lessons Learned
1. **Connector Diversity**
- Payment processors have widely varying APIs and capabilities
- A flexible abstraction layer is essential for handling this diversity
2. **Type System Complexity**
- Converting between different type systems (gRPC, domain, connector) is complex
- A well-designed type conversion system is critical for maintainability
3. **Error Handling Importance**
- Payment processing involves many potential error cases
- Clear, consistent error handling is essential for reliability
4. **Documentation Value**
- Good documentation is crucial for both users and contributors
- Examples and clear guides significantly improve adoption
5. **Testing Challenges**
- Testing payment flows often requires mock servers or test accounts
- A comprehensive testing strategy is essential for reliability
## Roadmap Alignment
The current progress aligns with the project's roadmap in the following ways:
### Achieved Goals
1. ✅ **Unified Contract**: Implemented a consistent API across supported payment processors
2. ✅ **Core Functionality**: Implemented all core payment operations
3. ✅ **Production Readiness**: Deployed in production as part of Hyperswitch
4. ✅ **Basic SDK Support**: Provided client SDKs for multiple languages
### In Progress
1. 🟡 **Connector Expansion**: Adding support for more payment processors
2. 🟡 **Payment Method Coverage**: Expanding beyond basic card payments
3. 🟡 **Documentation Enhancement**: Improving documentation for users and contributors
4. 🟡 **Testing Improvement**: Increasing test coverage and reliability
### Future Goals
1. 📋 **Comprehensive Connector Support**: Implementing a wide range of payment processors
2. 📋 **Advanced Payment Flows**: Supporting complex payment scenarios
3. 📋 **Performance Optimization**: Enhancing throughput and latency
4. 📋 **Community Growth**: Fostering a community of contributors
## Success Metrics
The project's success can be measured by the following metrics:
1. **Connector Coverage**: Number of supported payment processors
- Current: 2 (Adyen, Razorpay)
- Target: 10+ major processors
2. **Payment Method Support**: Number of supported payment methods
- Current: 1 (Credit/Debit Cards)
- Target: 5+ major methods
3. **API Stability**: Frequency of breaking changes
- Current: Stable API with infrequent changes
- Target: Maintain API stability with clear deprecation policies
4. **Performance**: Latency and throughput
- Current: Acceptable for production use
- Target: Continuous improvement based on benchmarks
5. **Community Engagement**: Contributors and users
- Current: Limited community beyond Hyperswitch
- Target: Growing community of contributors and users