| 254 | } |
| 255 | |
| 256 | bool static CheckMinimalPush(const valtype& data, opcodetype opcode) { |
| 257 | // Excludes OP_1NEGATE, OP_1-16 since they are by definition minimal |
| 258 | assert(0 <= opcode && opcode <= OP_PUSHDATA4); |
| 259 | if (data.size() == 0) { |
| 260 | // Should have used OP_0. |
| 261 | return opcode == OP_0; |
| 262 | } else if (data.size() == 1 && data[0] >= 1 && data[0] <= 16) { |
| 263 | // Should have used OP_1 .. OP_16. |
| 264 | return false; |
| 265 | } else if (data.size() == 1 && data[0] == 0x81) { |
| 266 | // Should have used OP_1NEGATE. |
| 267 | return false; |
| 268 | } else if (data.size() <= 75) { |
| 269 | // Must have used a direct push (opcode indicating number of bytes pushed + those bytes). |
| 270 | return opcode == data.size(); |
| 271 | } else if (data.size() <= 255) { |
| 272 | // Must have used OP_PUSHDATA. |
| 273 | return opcode == OP_PUSHDATA1; |
| 274 | } else if (data.size() <= 65535) { |
| 275 | // Must have used OP_PUSHDATA2. |
| 276 | return opcode == OP_PUSHDATA2; |
| 277 | } |
| 278 | return true; |
| 279 | } |
| 280 | |
| 281 | int FindAndDelete(CScript& script, const CScript& b) |
| 282 | { |