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Add a descriptive comment for secp256k1_ecmult_const. #634

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Jun 4, 2019
Merged

Add a descriptive comment for secp256k1_ecmult_const. #634

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7 changes: 5 additions & 2 deletions src/ecmult_const.h
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Original file line number Diff line number Diff line change
Expand Up @@ -10,8 +10,11 @@
#include "scalar.h"
#include "group.h"

/* Here `bits` should be set to the maximum bitlength of the _absolute value_ of `q`, plus
* one because we internally sometimes add 2 to the number during the WNAF conversion. */
/**
* Multiply: R = q*A (in constant-time)
* Here `bits` should be set to the maximum bitlength of the _absolute value_ of `q`, plus
* one because we internally sometimes add 2 to the number during the WNAF conversion.
*/
static void secp256k1_ecmult_const(secp256k1_gej *r, const secp256k1_ge *a, const secp256k1_scalar *q, int bits);

#endif /* SECP256K1_ECMULT_CONST_H */