Generate a 32 byte nonce for use in an emitted transaction

Behaviour

  • Write a 32 byte random value to the write_ptr

Definition

int64_t ledger_nonce (
    uint32_t write_ptr,
    uint32_t write_len
);

Example

uint8_t n[32];
int64_t bytes_written = 
    ledger_nonce(n, 32);

Parameters

Name

Type

Description

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.

Return Code

Type

Description

int64_t

The number of bytes written

If negative, an error:
OUT_OF_BOUNDS

  • pointers/lengths specified outside of hook memory.