Bit-Wasp /
bitcoin-php
Complex classes like InputSigner often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use InputSigner, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 36 | class InputSigner implements InputSignerInterface |
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| 37 | { |
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| 38 | /** |
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| 39 | * @var array |
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| 40 | */ |
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| 41 | protected static $canSign = [ |
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| 42 | ScriptType::P2PKH, |
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| 43 | ScriptType::P2PK, |
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| 44 | ScriptType::MULTISIG |
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| 45 | ]; |
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| 46 | |||
| 47 | /** |
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| 48 | * @var array |
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| 49 | */ |
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| 50 | protected static $validP2sh = [ |
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| 51 | ScriptType::P2WKH, |
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| 52 | ScriptType::P2WSH, |
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| 53 | ScriptType::P2PKH, |
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| 54 | ScriptType::P2PK, |
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| 55 | ScriptType::MULTISIG |
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| 56 | ]; |
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| 57 | |||
| 58 | /** |
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| 59 | * @var EcAdapterInterface |
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| 60 | */ |
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| 61 | private $ecAdapter; |
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| 62 | |||
| 63 | /** |
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| 64 | * @var OutputData $scriptPubKey |
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| 65 | */ |
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| 66 | private $scriptPubKey; |
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| 67 | |||
| 68 | /** |
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| 69 | * @var OutputData $redeemScript |
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| 70 | */ |
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| 71 | private $redeemScript; |
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| 72 | |||
| 73 | /** |
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| 74 | * @var OutputData $witnessScript |
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| 75 | */ |
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| 76 | private $witnessScript; |
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| 77 | |||
| 78 | /** |
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| 79 | * @var OutputData |
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| 80 | */ |
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| 81 | private $signScript; |
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| 82 | |||
| 83 | /** |
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| 84 | * @var bool |
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| 85 | */ |
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| 86 | private $tolerateInvalidPublicKey = false; |
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| 87 | |||
| 88 | /** |
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| 89 | * @var SignData |
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| 90 | */ |
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| 91 | private $signData; |
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| 92 | |||
| 93 | /** |
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| 94 | * @var int |
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| 95 | */ |
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| 96 | private $sigVersion; |
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| 97 | |||
| 98 | /** |
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| 99 | * @var int |
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| 100 | */ |
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| 101 | private $flags; |
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| 102 | |||
| 103 | /** |
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| 104 | * @var OutputData $witnessKeyHash |
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| 105 | */ |
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| 106 | private $witnessKeyHash; |
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| 107 | |||
| 108 | /** |
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| 109 | * @var TransactionInterface |
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| 110 | */ |
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| 111 | private $tx; |
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| 112 | |||
| 113 | /** |
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| 114 | * @var int |
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| 115 | */ |
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| 116 | private $nInput; |
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| 117 | |||
| 118 | /** |
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| 119 | * @var TransactionOutputInterface |
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| 120 | */ |
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| 121 | private $txOut; |
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| 122 | |||
| 123 | /** |
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| 124 | * @var PublicKeyInterface[] |
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| 125 | */ |
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| 126 | private $publicKeys = []; |
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| 127 | |||
| 128 | /** |
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| 129 | * @var TransactionSignatureInterface[] |
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| 130 | */ |
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| 131 | private $signatures = []; |
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| 132 | |||
| 133 | /** |
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| 134 | * @var int |
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| 135 | */ |
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| 136 | private $requiredSigs = 0; |
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| 137 | |||
| 138 | /** |
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| 139 | * @var Interpreter |
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| 140 | */ |
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| 141 | private $interpreter; |
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| 142 | |||
| 143 | /** |
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| 144 | * @var CheckerBase |
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| 145 | */ |
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| 146 | private $signatureChecker; |
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| 147 | |||
| 148 | /** |
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| 149 | * @var TransactionSignatureSerializer |
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| 150 | */ |
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| 151 | private $txSigSerializer; |
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| 152 | |||
| 153 | /** |
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| 154 | * @var PublicKeySerializerInterface |
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| 155 | */ |
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| 156 | private $pubKeySerializer; |
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| 157 | |||
| 158 | /** |
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| 159 | * InputSigner constructor. |
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| 160 | * |
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| 161 | * Note, the implementation of this class is considered internal |
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| 162 | * and only the methods exposed on InputSignerInterface should |
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| 163 | * be depended on to avoid BC breaks. |
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| 164 | * |
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| 165 | * The only recommended way to produce this class is using Signer::input() |
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| 166 | * |
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| 167 | * @param EcAdapterInterface $ecAdapter |
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| 168 | * @param TransactionInterface $tx |
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| 169 | * @param int $nInput |
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| 170 | * @param TransactionOutputInterface $txOut |
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| 171 | * @param SignData $signData |
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| 172 | * @param CheckerBase $checker |
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| 173 | * @param TransactionSignatureSerializer|null $sigSerializer |
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| 174 | * @param PublicKeySerializerInterface|null $pubKeySerializer |
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| 175 | */ |
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| 176 | 72 | public function __construct(EcAdapterInterface $ecAdapter, TransactionInterface $tx, $nInput, TransactionOutputInterface $txOut, SignData $signData, CheckerBase $checker, TransactionSignatureSerializer $sigSerializer = null, PublicKeySerializerInterface $pubKeySerializer = null) |
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| 192 | |||
| 193 | /** |
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| 194 | * @return InputSigner |
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| 195 | */ |
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| 196 | 72 | public function extract() |
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| 208 | |||
| 209 | /** |
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| 210 | * @param bool $setting |
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| 211 | * @return $this |
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| 212 | */ |
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| 213 | 57 | public function tolerateInvalidPublicKey($setting) |
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| 218 | |||
| 219 | /** |
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| 220 | * @param BufferInterface $vchPubKey |
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| 221 | * @return PublicKeyInterface|null |
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| 222 | * @throws \Exception |
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| 223 | */ |
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| 224 | 55 | protected function parseStepPublicKey(BufferInterface $vchPubKey) |
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| 225 | { |
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| 226 | try { |
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| 227 | 55 | return $this->pubKeySerializer->parse($vchPubKey); |
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| 228 | } catch (\Exception $e) { |
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| 229 | if ($this->tolerateInvalidPublicKey) { |
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| 230 | return null; |
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| 231 | } |
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| 232 | |||
| 233 | throw $e; |
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| 234 | } |
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| 235 | } |
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| 236 | |||
| 237 | /** |
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| 238 | * A snipped from OP_CHECKMULTISIG - verifies signatures according to the |
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| 239 | * order of the given public keys (taken from the script). |
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| 240 | * |
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| 241 | * @param ScriptInterface $script |
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| 242 | * @param BufferInterface[] $signatures |
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| 243 | * @param BufferInterface[] $publicKeys |
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| 244 | * @param int $sigVersion |
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| 245 | * @return \SplObjectStorage |
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| 246 | * @throws \BitWasp\Bitcoin\Exceptions\ScriptRuntimeException |
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| 247 | */ |
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| 248 | 10 | private function sortMultisigs(ScriptInterface $script, array $signatures, array $publicKeys, $sigVersion) |
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| 280 | |||
| 281 | /** |
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| 282 | * @param ScriptInterface $script |
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| 283 | * @return \BitWasp\Buffertools\BufferInterface[] |
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| 284 | */ |
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| 285 | 58 | private function evalPushOnly(ScriptInterface $script) |
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| 291 | |||
| 292 | /** |
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| 293 | * Create a script consisting only of push-data operations. |
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| 294 | * Suitable for a scriptSig. |
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| 295 | * |
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| 296 | * @param BufferInterface[] $buffers |
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| 297 | * @return ScriptInterface |
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| 298 | */ |
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| 299 | private function pushAll(array $buffers) |
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| 319 | |||
| 320 | /** |
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| 321 | * Verify a scriptSig / scriptWitness against a scriptPubKey. |
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| 322 | * Useful for checking the outcome of certain things, like hash locks (p2sh) |
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| 323 | * |
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| 324 | * @param int $flags |
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| 325 | * @param ScriptInterface $scriptSig |
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| 326 | * @param ScriptInterface $scriptPubKey |
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| 327 | * @param ScriptWitnessInterface|null $scriptWitness |
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| 328 | * @return bool |
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| 329 | */ |
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| 330 | 22 | private function verifySolution($flags, ScriptInterface $scriptSig, ScriptInterface $scriptPubKey, ScriptWitnessInterface $scriptWitness = null) |
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| 334 | |||
| 335 | /** |
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| 336 | * Evaluates a scriptPubKey against the provided chunks. |
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| 337 | * |
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| 338 | * @param ScriptInterface $scriptPubKey |
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| 339 | * @param array $chunks |
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| 340 | * @param int $sigVersion |
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| 341 | * @return bool |
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| 342 | */ |
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| 343 | 53 | private function evaluateSolution(ScriptInterface $scriptPubKey, array $chunks, $sigVersion) |
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| 360 | |||
| 361 | /** |
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| 362 | * This function is strictly for $canSign types. |
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| 363 | * It will extract signatures/publicKeys when given $outputData, and $stack. |
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| 364 | * $stack is the result of decompiling a scriptSig, or taking the witness data. |
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| 365 | * |
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| 366 | * @param OutputData $outputData |
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| 367 | * @param array $stack |
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| 368 | * @param int $sigVersion |
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| 369 | * @return string |
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| 370 | * @throws SignerException |
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| 371 | * @throws \Exception |
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| 372 | */ |
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| 373 | 60 | public function extractFromValues(OutputData $outputData, array $stack, $sigVersion) |
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| 436 | |||
| 437 | /** |
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| 438 | * Checks $chunks (a decompiled scriptSig) for it's last element, |
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| 439 | * or defers to SignData. If both are provided, it checks the |
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| 440 | * value from $chunks against SignData. |
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| 441 | * |
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| 442 | * @param BufferInterface[] $chunks |
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| 443 | * @param SignData $signData |
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| 444 | * @return ScriptInterface |
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| 445 | */ |
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| 446 | 24 | private function findRedeemScript(array $chunks, SignData $signData) |
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| 464 | |||
| 465 | /** |
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| 466 | * Checks $witness (a witness structure) for it's last element, |
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| 467 | * or defers to SignData. If both are provided, it checks the |
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| 468 | * value from $chunks against SignData. |
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| 469 | * |
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| 470 | * @param BufferInterface[] $witness |
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| 471 | * @param SignData $signData |
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| 472 | * @return ScriptInterface |
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| 473 | */ |
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| 474 | 20 | private function findWitnessScript(array $witness, SignData $signData) |
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| 492 | |||
| 493 | /** |
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| 494 | * Needs to be called before using the instance. By `extract`. |
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| 495 | * |
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| 496 | * It ensures that violating the following prevents instance creation |
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| 497 | * - the scriptPubKey can be directly signed, or leads to P2SH/P2WSH/P2WKH |
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| 498 | * - the P2SH script covers signable types and P2WSH/P2WKH |
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| 499 | * - the witnessScript covers signable types only |
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| 500 | * |
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| 501 | * @param SignData $signData |
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| 502 | * @param ScriptInterface $scriptPubKey |
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| 503 | * @param ScriptInterface $scriptSig |
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| 504 | * @param BufferInterface[] $witness |
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| 505 | * @return $this |
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| 506 | * @throws SignerException |
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| 507 | */ |
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| 508 | 71 | private function solve(SignData $signData, ScriptInterface $scriptPubKey, ScriptInterface $scriptSig, array $witness) |
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| 565 | |||
| 566 | /** |
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| 567 | * Pure function to produce a signature hash for a given $scriptCode, $sigHashType, $sigVersion. |
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| 568 | * |
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| 569 | * @param ScriptInterface $scriptCode |
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| 570 | * @param $sigHashType |
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| 571 | * @param $sigVersion |
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| 572 | * @return BufferInterface |
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| 573 | * @throws SignerException |
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| 574 | */ |
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| 575 | 51 | public function calculateSigHashUnsafe(ScriptInterface $scriptCode, $sigHashType, $sigVersion) |
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| 583 | |||
| 584 | /** |
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| 585 | * Calculates the signature hash for the input for the given $sigHashType. |
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| 586 | * |
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| 587 | * @param int $sigHashType |
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| 588 | * @return BufferInterface |
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| 589 | * @throws SignerException |
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| 590 | */ |
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| 591 | 1 | public function getSigHash($sigHashType) |
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| 595 | |||
| 596 | /** |
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| 597 | * Pure function to produce a signature for a given $key, $scriptCode, $sigHashType, $sigVersion. |
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| 598 | * |
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| 599 | * @param PrivateKeyInterface $key |
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| 600 | * @param ScriptInterface $scriptCode |
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| 601 | * @param int $sigHashType |
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| 602 | * @param int $sigVersion |
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| 603 | * @return TransactionSignatureInterface |
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| 604 | * @throws SignerException |
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| 605 | */ |
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| 606 | 50 | private function calculateSignature(PrivateKeyInterface $key, ScriptInterface $scriptCode, $sigHashType, $sigVersion) |
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| 612 | |||
| 613 | /** |
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| 614 | * Returns whether all required signatures have been provided. |
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| 615 | * |
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| 616 | * @return bool |
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| 617 | */ |
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| 618 | 56 | public function isFullySigned() |
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| 622 | |||
| 623 | /** |
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| 624 | * Returns the required number of signatures for this input. |
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| 625 | * |
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| 626 | * @return int |
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| 627 | */ |
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| 628 | 50 | public function getRequiredSigs() |
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| 632 | |||
| 633 | /** |
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| 634 | * Returns an array where the values are either null, |
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| 635 | * or a TransactionSignatureInterface. |
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| 636 | * |
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| 637 | * @return TransactionSignatureInterface[] |
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| 638 | */ |
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| 639 | 50 | public function getSignatures() |
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| 643 | |||
| 644 | /** |
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| 645 | * Returns an array where the values are either null, |
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| 646 | * or a PublicKeyInterface. |
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| 647 | * |
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| 648 | * @return PublicKeyInterface[] |
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| 649 | */ |
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| 650 | 50 | public function getPublicKeys() |
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| 654 | |||
| 655 | /** |
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| 656 | * OutputData for the script to be signed (will be |
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| 657 | * equal to getScriptPubKey, or getRedeemScript, or |
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| 658 | * getWitnessScript. |
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| 659 | * |
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| 660 | * @return OutputData |
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| 661 | */ |
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| 662 | 50 | public function getSignScript() |
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| 666 | |||
| 667 | /** |
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| 668 | * OutputData for the txOut script. |
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| 669 | * |
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| 670 | * @return OutputData |
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| 671 | */ |
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| 672 | 24 | public function getScriptPubKey() |
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| 676 | |||
| 677 | /** |
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| 678 | * Returns OutputData for the P2SH redeemScript. |
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| 679 | * |
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| 680 | * @return OutputData |
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| 681 | */ |
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| 682 | 18 | public function getRedeemScript() |
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| 690 | |||
| 691 | /** |
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| 692 | * Returns OutputData for the P2WSH witnessScript. |
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| 693 | * |
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| 694 | * @return OutputData |
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| 695 | */ |
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| 696 | 14 | public function getWitnessScript() |
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| 704 | |||
| 705 | /** |
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| 706 | * Returns whether the scriptPubKey is P2SH. |
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| 707 | * |
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| 708 | * @return bool |
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| 709 | */ |
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| 710 | 50 | public function isP2SH() |
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| 718 | |||
| 719 | /** |
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| 720 | * Returns whether the scriptPubKey or redeemScript is P2WSH. |
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| 721 | * |
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| 722 | * @return bool |
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| 723 | */ |
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| 724 | 50 | public function isP2WSH() |
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| 738 | |||
| 739 | /** |
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| 740 | * Sign the input using $key and $sigHashTypes |
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| 741 | * |
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| 742 | * @param PrivateKeyInterface $privateKey |
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| 743 | * @param int $sigHashType |
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| 744 | * @return $this |
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| 745 | * @throws SignerException |
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| 746 | */ |
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| 747 | 56 | public function sign(PrivateKeyInterface $privateKey, $sigHashType = SigHash::ALL) |
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| 793 | |||
| 794 | /** |
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| 795 | * Verifies the input using $flags for script verification |
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| 796 | * |
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| 797 | * @param int $flags |
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| 798 | * @return bool |
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| 799 | */ |
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| 800 | 50 | public function verify($flags = null) |
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| 834 | |||
| 835 | /** |
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| 836 | * Produces the script stack that solves the $outputType |
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| 837 | * |
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| 838 | * @param string $outputType |
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| 839 | * @return BufferInterface[] |
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| 840 | */ |
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| 841 | 50 | private function serializeSolution($outputType) |
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| 865 | |||
| 866 | /** |
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| 867 | * Produces a SigValues instance containing the scriptSig & script witness |
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| 868 | * |
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| 869 | * @return SigValues |
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| 870 | */ |
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| 871 | 50 | public function serializeSignatures() |
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| 911 | } |
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| 912 |
Loading history...
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..