Output the canonical hash of the originating transaction
Write the canonical hash of the originating transaction to the output buffer.
If flags = 1 and the transaction is an EMIT_FAILURE transaction then write the canonical hash of the originating transaction that caused the emission.
C
C
write_ptr
uint32_t
Pointer to a buffer of to store the hash.
write_len
uint32_t
Length of the output buffer. Should be at least 32 bytes.
flags
uint32_t
If 0:
Write the canonical hash of the originating transaction.
If 1 AND the originating transaction is an EMIT_FAILURE:
Write the canonical hash of the emitting transaction.
int64_t
The number of bytes written
If negative, an error:
OUT_OF_BOUNDS
- pointers/lengths specified outside of hook memory.
TOO_SMALL
- output buffer was not large enough to hold the serialized object