|
| 1 | +# ZK-ATDLOG Testing Architecture |
| 2 | + |
| 3 | +This document explains the testing architecture for the Zero-Knowledge Anonymous Token Discrete Logarithm (ZK-ATDLOG) implementation in the Fabric Token SDK. |
| 4 | + |
| 5 | +> **Related Documentation:** |
| 6 | +> - [Running Benchmarks](./dlognogh.md) - How to run performance benchmarks |
| 7 | +> - [Regression Tests](./dlognogh_regression.md) - Backwards compatibility testing |
| 8 | +
|
| 9 | +## Overview |
| 10 | + |
| 11 | +The ZK-ATDLOG tests are organized in a **layered architecture** that mirrors the **code abstraction levels**. Each layer represents a different level of the software stack - from low-level cryptographic primitives to high-level service APIs. |
| 12 | + |
| 13 | +## Architecture Layers |
| 14 | + |
| 15 | +Each layer represents a different **code abstraction level**. |
| 16 | + |
| 17 | +``` |
| 18 | +┌─────────────────────────────────────────────────────────────────┐ |
| 19 | +│ Layer 3: Service Layer (Highest Abstraction) │ |
| 20 | +├─────────────────────────────────────────────────────────────────┤ |
| 21 | +│ Transfer Generation Service │ |
| 22 | +│ Location: token/core/zkatdlog/nogh/v1/ │ |
| 23 | +│ Tests: - BenchmarkTransferServiceTransfer │ |
| 24 | +│ - TestParallelBenchmarkTransferServiceTransfer │ |
| 25 | +│ Purpose: End-to-end transfer operation generation with vault, │ |
| 26 | +│ audit, and metadata handling │ |
| 27 | +├─────────────────────────────────────────────────────────────────┤ |
| 28 | +│ Transfer Validator Service │ |
| 29 | +│ Location: token/core/zkatdlog/nogh/v1/validator/ │ |
| 30 | +│ Tests: - BenchmarkValidatorTransfer │ |
| 31 | +│ - TestParallelBenchmarkValidatorTransfer │ |
| 32 | +│ Purpose: Transfer validation with signatures, business logic, │ |
| 33 | +│ and cryptographic verification │ |
| 34 | +└─────────────────────────────────────────────────────────────────┘ |
| 35 | +
|
| 36 | +┌─────────────────────────────────────────────────────────────────┐ |
| 37 | +│ Layer 2: Action Operations │ |
| 38 | +├─────────────────────────────────────────────────────────────────┤ |
| 39 | +│ Transfer Generation (token/core/zkatdlog/nogh/v1/transfer/) │ |
| 40 | +│ Tests: - BenchmarkSender │ |
| 41 | +│ - BenchmarkParallelSender │ |
| 42 | +│ - TestParallelBenchmarkSender │ |
| 43 | +│ Purpose: Transfer action generation and serialization │ |
| 44 | +├─────────────────────────────────────────────────────────────────┤ |
| 45 | +│ Transfer Verification (token/core/zkatdlog/nogh/v1/transfer/) │ |
| 46 | +│ Tests: - BenchmarkVerificationSenderProof │ |
| 47 | +│ - BenchmarkVerificationParallelSenderProof │ |
| 48 | +│ - TestParallelBenchmarkVerificationSenderProof │ |
| 49 | +│ Purpose: Deserialization and cryptographic format validation │ |
| 50 | +│ and verification of transfer actions │ |
| 51 | +├─────────────────────────────────────────────────────────────────┤ |
| 52 | +│ Issue Generation (token/core/zkatdlog/nogh/v1/issue/) │ |
| 53 | +│ Tests: - BenchmarkIssuer │ |
| 54 | +│ Purpose: Issue action generation and serialization │ |
| 55 | +├─────────────────────────────────────────────────────────────────┤ |
| 56 | +│ Issue Verification (token/core/zkatdlog/nogh/v1/issue/) │ |
| 57 | +│ Tests: - BenchmarkProofVerificationIssuer │ |
| 58 | +│ Purpose: Deserialization and cryptographic verification of │ |
| 59 | +│ issue actions │ |
| 60 | +└─────────────────────────────────────────────────────────────────┘ |
| 61 | +
|
| 62 | +┌─────────────────────────────────────────────────────────────────┐ |
| 63 | +│ Layer 1: Core Cryptographic Operations (Lowest Abstraction) │ |
| 64 | +│ Location: token/core/zkatdlog/nogh/v1/transfer/ │ |
| 65 | +│ Tests: - BenchmarkTransferProofGeneration │ |
| 66 | +│ - TestParallelBenchmarkTransferProofGeneration │ |
| 67 | +│ Purpose: Pure transfer ZK proof generation and serialization │ |
| 68 | +└─────────────────────────────────────────────────────────────────┘ |
| 69 | +``` |
| 70 | + |
| 71 | +--- |
| 72 | + |
| 73 | +## Layer 1: Core Cryptographic Operations |
| 74 | + |
| 75 | +**Location:** `token/core/zkatdlog/nogh/v1/transfer/` |
| 76 | + |
| 77 | +### Tests |
| 78 | +- `BenchmarkTransferProofGeneration` |
| 79 | +- `TestParallelBenchmarkTransferProofGeneration` |
| 80 | + |
| 81 | +### Purpose |
| 82 | +Pure zero-knowledge proof generation and serialization for transfer operations. The parallel version runs the same benchmark in multiple goroutines. |
| 83 | + |
| 84 | +### Includes |
| 85 | +- ZK proof computation (range proofs, sum proofs, type proofs) |
| 86 | +- Proof serialization to bytes |
| 87 | + |
| 88 | +### Example Commands |
| 89 | +```bash |
| 90 | +cd token/core/zkatdlog/nogh/v1/transfer |
| 91 | +go test -bench=BenchmarkTransferProofGeneration -benchtime=10s |
| 92 | +go test -run=TestParallelBenchmarkTransferProofGeneration -v |
| 93 | +``` |
| 94 | + |
| 95 | +--- |
| 96 | + |
| 97 | +## Layer 2: Action Operations |
| 98 | + |
| 99 | +### Transfer Action Generation |
| 100 | + |
| 101 | +**Location:** `token/core/zkatdlog/nogh/v1/transfer/` |
| 102 | + |
| 103 | +#### Tests |
| 104 | +- `BenchmarkSender` |
| 105 | +- `BenchmarkParallelSender` |
| 106 | +- `TestParallelBenchmarkSender` |
| 107 | + |
| 108 | +#### Purpose |
| 109 | +Complete transfer action creation from inputs to serialized output. |
| 110 | + |
| 111 | +**Note:** `BenchmarkParallelSender` is a Go benchmark (uses `*testing.B`), while `TestParallelBenchmarkSender` is a test (uses `*testing.T`) that runs custom benchmarking. Same functionality, different frameworks. |
| 112 | + |
| 113 | +#### Includes |
| 114 | +- ZK proof generation (range proofs, sum proofs, type proofs) |
| 115 | +- Input token handling |
| 116 | +- Output token creation |
| 117 | +- Action serialization |
| 118 | + |
| 119 | +#### Example Commands |
| 120 | +```bash |
| 121 | +cd token/core/zkatdlog/nogh/v1/transfer |
| 122 | +go test -bench=BenchmarkSender -benchtime=10s |
| 123 | +go test -bench=BenchmarkParallelSender -benchtime=10s |
| 124 | +go test -run=TestParallelBenchmarkSender -v |
| 125 | +``` |
| 126 | + |
| 127 | +### Transfer Action Verification |
| 128 | + |
| 129 | +**Location:** `token/core/zkatdlog/nogh/v1/transfer/` |
| 130 | + |
| 131 | +#### Tests |
| 132 | +- `BenchmarkVerificationSenderProof` |
| 133 | +- `BenchmarkVerificationParallelSenderProof` |
| 134 | +- `TestParallelBenchmarkVerificationSenderProof` |
| 135 | + |
| 136 | +#### Purpose |
| 137 | +Deserialization and cryptographic format validation and verification of transfer actions. |
| 138 | + |
| 139 | +#### Includes |
| 140 | +- Action deserialization |
| 141 | +- ZKP format validation |
| 142 | +- ZK proof verification (range proofs, sum proofs, type proofs) |
| 143 | + |
| 144 | +#### Example Commands |
| 145 | +```bash |
| 146 | +cd token/core/zkatdlog/nogh/v1/transfer |
| 147 | +go test -bench=BenchmarkVerificationSenderProof -benchtime=10s |
| 148 | +go test -bench=BenchmarkVerificationParallelSenderProof -benchtime=10s |
| 149 | +go test -run=TestParallelBenchmarkVerificationSenderProof -v |
| 150 | +``` |
| 151 | + |
| 152 | +### Issue Action Generation |
| 153 | + |
| 154 | +**Location:** `token/core/zkatdlog/nogh/v1/issue/` |
| 155 | + |
| 156 | +#### Tests |
| 157 | +- `BenchmarkIssuer` |
| 158 | + |
| 159 | +#### Purpose |
| 160 | +Complete issue action creation from inputs to serialized output. |
| 161 | + |
| 162 | +#### Includes |
| 163 | +- ZK proof generation (range proofs, same-type proofs) |
| 164 | +- Output token creation |
| 165 | +- Action serialization |
| 166 | + |
| 167 | +#### Example Commands |
| 168 | +```bash |
| 169 | +cd token/core/zkatdlog/nogh/v1/issue |
| 170 | +go test -bench=BenchmarkIssuer -benchtime=10s |
| 171 | +go test -bench=BenchmarkIssuer -benchmem |
| 172 | +go test -bench=BenchmarkIssuer -cpuprofile=cpu.prof |
| 173 | +``` |
| 174 | + |
| 175 | +### Issue Action Verification |
| 176 | + |
| 177 | +**Location:** `token/core/zkatdlog/nogh/v1/issue/` |
| 178 | + |
| 179 | +#### Tests |
| 180 | +- `BenchmarkProofVerificationIssuer` |
| 181 | + |
| 182 | +#### Purpose |
| 183 | +Deserialization and cryptographic verification of issue actions. |
| 184 | + |
| 185 | +#### Includes |
| 186 | +- Action deserialization |
| 187 | +- ZKP format validation |
| 188 | +- ZK proof verification (range proofs, same-type proofs) |
| 189 | + |
| 190 | +#### Example Commands |
| 191 | +```bash |
| 192 | +cd token/core/zkatdlog/nogh/v1/issue |
| 193 | +go test -bench=BenchmarkProofVerificationIssuer -benchtime=10s |
| 194 | +``` |
| 195 | + |
| 196 | +--- |
| 197 | + |
| 198 | +## Layer 3: Service Layer |
| 199 | + |
| 200 | +The Service Layer provides the highest level of abstraction for complete end-to-end transfer operation generation through the high-level Transfer Service API and complete validation pipeline performance, including all cryptographic and business logic checks. |
| 201 | + |
| 202 | +### Transfer Generation Service |
| 203 | + |
| 204 | +**Location:** `token/core/zkatdlog/nogh/v1/` |
| 205 | + |
| 206 | +#### Tests |
| 207 | +- `BenchmarkTransferServiceTransfer` |
| 208 | +- `TestParallelBenchmarkTransferServiceTransfer` |
| 209 | + |
| 210 | +#### Purpose |
| 211 | +Complete end-to-end transfer operation generation through the high-level Transfer Service API. |
| 212 | + |
| 213 | +#### Includes |
| 214 | +- **Token Loading**: Loads input tokens from vault by their IDs, retrieves token data and metadata |
| 215 | +- **Input Preparation**: Deserializes loaded tokens, extracts token commitments, metadata, owner information, and prepares upgrade witnesses if needed |
| 216 | +- **Sender Initialization**: Creates a Sender instance with prepared inputs, sets up ZK proof generation context |
| 217 | +- **Output Processing**: Extracts target values and owners from requested outputs, converts quantities to proper format, detects redeem operations (empty owner) |
| 218 | +- **ZK Transfer Generation**: Generates ZK-SNARK transfer proof (range, sum, type proofs), creates output token commitments, produces output metadata with blinding factors |
| 219 | +- **Metadata Enrichment**: Adds transfer action metadata attributes, attaches upgrade witnesses to inputs |
| 220 | +- **Audit Information**: Collects audit info for all input token owners, prepares transfer input metadata |
| 221 | +- **Output Metadata**: Collects audit info for all output recipients, handles redeem case (no recipient), serializes output metadata, creates transfer output metadata |
| 222 | +- **Redeem Handling**: Selects authorized issuer for redeem operations, adds issuer to transfer action and metadata |
| 223 | + |
| 224 | + |
| 225 | +#### Example Commands |
| 226 | +```bash |
| 227 | +cd token/core/zkatdlog/nogh/v1 |
| 228 | +go test -bench=BenchmarkTransferServiceTransfer -benchtime=10s |
| 229 | +go test -run=TestParallelBenchmarkTransferServiceTransfer -v |
| 230 | +``` |
| 231 | + |
| 232 | +### Transfer Validator Service |
| 233 | + |
| 234 | +**Location:** `token/core/zkatdlog/nogh/v1/validator/` |
| 235 | + |
| 236 | +#### Tests |
| 237 | +- `BenchmarkValidatorTransfer` |
| 238 | +- `TestParallelBenchmarkValidatorTransfer` |
| 239 | + |
| 240 | +#### Compatibility Tests |
| 241 | +- `regression_test.go` (in `validator/regression/`) |
| 242 | + |
| 243 | +#### Purpose |
| 244 | +Complete validation pipeline performance, including all cryptographic and business logic checks. |
| 245 | + |
| 246 | +#### Includes |
| 247 | +- Action deserialization |
| 248 | +- Token validation |
| 249 | +- Signature verification (including auditors) |
| 250 | +- Business logic checks (double-spend prevention, balance checks, etc.) |
| 251 | +- ZKP format validation |
| 252 | +- ZKP verification (range proofs, sum proofs, type proofs) |
| 253 | + |
| 254 | +#### Example Commands |
| 255 | +```bash |
| 256 | +cd token/core/zkatdlog/nogh/v1/validator |
| 257 | +go test -bench=BenchmarkValidatorTransfer -benchtime=10s |
| 258 | +go test -run=TestParallelBenchmarkValidatorTransfer -v |
| 259 | +``` |
| 260 | +### Transfer Validator Service |
| 261 | + |
| 262 | +**Location:** `token/core/zkatdlog/nogh/v1/validator/` |
| 263 | + |
| 264 | +#### Tests |
| 265 | +- `BenchmarkValidatorTransfer` |
| 266 | +- `TestParallelBenchmarkValidatorTransfer` |
| 267 | + |
| 268 | +#### Compatibility Tests |
| 269 | +- `regression_test.go` (in `validator/regression/`) |
| 270 | + |
| 271 | +#### Purpose |
| 272 | +Complete validation pipeline performance, including all cryptographic and business logic checks. |
| 273 | + |
| 274 | +#### Includes |
| 275 | +- Action deserialization |
| 276 | +- Token validation |
| 277 | +- Signature verification (including auditors) |
| 278 | +- Business logic checks (double-spend prevention, balance checks, etc.) |
| 279 | +- ZKP format validation |
| 280 | +- ZKP verification (range proofs, sum proofs, type proofs) |
| 281 | + |
| 282 | +#### Example Commands |
| 283 | +```bash |
| 284 | +cd token/core/zkatdlog/nogh/v1/validator |
| 285 | +go test -bench=BenchmarkValidatorTransfer -benchtime=10s |
| 286 | +go test -run=TestParallelBenchmarkValidatorTransfer -v |
| 287 | +``` |
| 288 | + |
| 289 | +--- |
| 290 | + |
| 291 | +## Testing Strategy |
| 292 | + |
| 293 | +### Understanding the Layers |
| 294 | + |
| 295 | +Each layer tests a **different code abstraction level independently**: |
| 296 | + |
| 297 | +- **Layer 1** tests only the cryptographic proof generation code (`Prover.Prove()`) |
| 298 | +- **Layer 2** tests the action creation/verification code (`Sender.GenerateZKTransfer()`, `Verifier.Verify()`) |
| 299 | +- **Layer 3** tests the service layer code: |
| 300 | + - **Transfer Validator Service**: validation logic (`Validator.VerifyTransfer()`) |
| 301 | + - **Transfer Generation Service**: end-to-end transfer generation (`TransferService.Transfer()`) |
| 302 | + |
| 303 | +**The layers do NOT build on each other** - they test different parts of the codebase at different abstraction levels. |
| 304 | + |
| 305 | +--- |
| 306 | + |
| 307 | +## Parallel Testing Variants |
| 308 | + |
| 309 | +Most layers include parallel test variants that run benchmarks concurrently: |
| 310 | +- **`Benchmark*Parallel`**: Go's built-in parallel benchmarking (`*testing.B`) |
| 311 | +- **`TestParallelBenchmark*`**: Custom parallel benchmarking framework (`*testing.T`) |
| 312 | + |
| 313 | +These help identify concurrency issues and measure performance under load. |
| 314 | + |
| 315 | +--- |
| 316 | + |
| 317 | +## Benchmark Parameters |
| 318 | + |
| 319 | +All benchmarks support various configurations: |
| 320 | +- **Bits**: 32, 64 (range proof bit sizes) |
| 321 | +- **Curves**: BN254, BLS12_381_BBS_GURVY, BLS12_381_BBS_GURVY_FAST_RNG |
| 322 | +- **Inputs**: 1, 2, 3 (number of input tokens for transfers) |
| 323 | +- **Outputs**: 1, 2, 3 (number of output tokens) |
| 324 | + |
| 325 | +Example with specific parameters: |
| 326 | +```bash |
| 327 | +go test -bench=BenchmarkSender/bits_32-curve_BN254-in_2-out_2 -benchtime=10s |
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