Compute the signature hash for one input under the selected signature version.
Declared in <script/interpreter.h>
template<class T>
uint256
SignatureHash(
CScript const& scriptCode,
T const& txTo,
unsigned int nIn,
int32_t nHashType,
CAmount const& amount,
SigVersion sigversion,
PrecomputedTransactionData const* cache = nullptr,
SigHashCache* sighash_cache = nullptr);The 256-bit signature hash.
| Name | Description |
|---|---|
| T | The transaction type being signed. |
| Name | Description |
|---|---|
| scriptCode | The script being executed for this input. |
| txTo | The transaction whose input is being signed. |
| nIn | Index of the input being signed. |
| nHashType | The sighash type byte controlling which parts are committed. |
| amount | The value of the output being spent. |
| sigversion | The signature version selecting the hashing scheme. |
| cache | Optional precomputed transaction data reused across inputs. |
| sighash_cache | Optional cache of SHA256 midstates for repeated computations. |