Complex classes like Checksig 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 Checksig, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 16 | class Checksig |
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| 17 | { |
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| 18 | /** |
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| 19 | * @var string |
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| 20 | */ |
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| 21 | private $scriptType; |
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| 22 | |||
| 23 | /** |
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| 24 | * @var bool |
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| 25 | */ |
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| 26 | private $required = true; |
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| 27 | |||
| 28 | /** |
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| 29 | * @var PayToPubkeyHash|PayToPubkey|Multisig |
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| 30 | */ |
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| 31 | private $info; |
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| 32 | |||
| 33 | /** |
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| 34 | * @var int |
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| 35 | */ |
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| 36 | protected $requiredSigs; |
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| 37 | |||
| 38 | /** |
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| 39 | * @var int |
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| 40 | */ |
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| 41 | protected $keyCount; |
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| 42 | |||
| 43 | /** |
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| 44 | * @var TransactionSignatureInterface[] |
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| 45 | */ |
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| 46 | protected $signatures = []; |
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| 47 | |||
| 48 | /** |
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| 49 | * @var PublicKeyInterface[]|null[] |
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| 50 | */ |
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| 51 | protected $publicKeys = []; |
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| 52 | |||
| 53 | /** |
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| 54 | * Checksig constructor. |
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| 55 | * @param $info |
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| 56 | */ |
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| 57 | 136 | public function __construct($info, TransactionSignatureSerializer $txSigSerializer, PublicKeySerializerInterface $pubKeySerializer) |
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| 91 | |||
| 92 | public function receivesValue(Conditional $conditional) |
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| 102 | |||
| 103 | 4 | public function setRequired($setting) |
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| 111 | |||
| 112 | 116 | public function isRequired() |
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| 116 | |||
| 117 | /** |
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| 118 | * @return Multisig|PayToPubkey|PayToPubkeyHash |
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| 119 | */ |
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| 120 | 84 | public function getInfo() |
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| 124 | |||
| 125 | /** |
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| 126 | * @return string |
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| 127 | */ |
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| 128 | 136 | public function getType() |
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| 132 | |||
| 133 | /** |
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| 134 | * @return array|BufferInterface|BufferInterface[] |
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| 135 | */ |
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| 136 | 82 | public function getSolution() |
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| 146 | |||
| 147 | /** |
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| 148 | * @return int |
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| 149 | */ |
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| 150 | 120 | public function getRequiredSigs() |
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| 154 | |||
| 155 | /** |
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| 156 | * @return bool |
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| 157 | */ |
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| 158 | 122 | public function isFullySigned() |
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| 166 | |||
| 167 | /** |
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| 168 | * @param int $idx |
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| 169 | * @return bool |
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| 170 | */ |
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| 171 | 118 | public function hasSignature($idx) |
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| 179 | |||
| 180 | /** |
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| 181 | * @param int $idx |
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| 182 | * @param TransactionSignatureInterface $signature |
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| 183 | * @return $this |
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| 184 | */ |
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| 185 | 116 | public function setSignature($idx, TransactionSignatureInterface $signature) |
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| 194 | |||
| 195 | /** |
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| 196 | * @param int $idx |
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| 197 | * @return TransactionSignatureInterface|null |
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| 198 | */ |
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| 199 | 116 | public function getSignature($idx) |
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| 207 | |||
| 208 | /** |
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| 209 | * @return array |
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| 210 | */ |
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| 211 | 116 | public function getSignatures() |
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| 215 | |||
| 216 | /** |
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| 217 | * @param int $idx |
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| 218 | * @return bool |
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| 219 | */ |
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| 220 | 68 | public function hasKey($idx) |
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| 224 | |||
| 225 | /** |
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| 226 | * @param int $idx |
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| 227 | * @return PublicKeyInterface|null |
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| 228 | */ |
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| 229 | 68 | public function getKey($idx) |
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| 237 | |||
| 238 | /** |
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| 239 | * @param $idx |
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| 240 | * @param PublicKeyInterface|null $key |
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| 241 | * @return $this |
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| 242 | */ |
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| 243 | 128 | public function setKey($idx, $key) |
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| 252 | |||
| 253 | /** |
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| 254 | * @return PublicKeyInterface[] |
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| 255 | */ |
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| 256 | 118 | public function getKeys() |
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| 260 | |||
| 261 | 118 | public function isVerify() |
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| 265 | |||
| 266 | /** |
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| 267 | * @return array |
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| 268 | */ |
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| 269 | 116 | public function serialize() |
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| 307 | } |
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| 308 |
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: