Retreive the 32 byte namespace biased SHA512H of the currently executing Hook
Look up the hash of the hook installed on hook account at position hook_no
Write the 32 byte hash to write_ptr
C
C
write_ptr
uint32_t
Pointer to a buffer of a suitable size to store the output. Should be at least 32 bytes.
write_len
uint32_t
Length of the output buffer.
hook_no
int32_t
The position in the hook chain the hook is located at, or -1 for the currently executing hook.
int64_t
The number of bytes written
If negative, an error:
OUT_OF_BOUNDS
- pointers/lengths specified outside of hook memory.
DOESNT_EXIST
- The specified hook sequence number doesn't exist in the hook chain.