util_accid

Convert an r-address into a 20 byte Account ID

Behaviour

• Read an r-address from the read_ptr

• Write a 20 byte Account ID to the write_ptr

Definition

C

int64_t util_accid (
    uint32_t write_ptr,
    uint32_t write_len,
    uint32_t read_ptr,
    uint32_t read_len
);

Example

C

uint8_t accid_out[20];
uint8_t raddr_in[] = "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh";

int64_t bytes_written = 
    util_accid(accid_out, 20, raddr_in, sizeof(raddr_in)-1);
// NB: if specified as a c-string as above, account for the nul char

Parameters

Name	Type	Description
write_ptr	uint32_t	Pointer to a buffer of a suitable size to store the output Account ID. Must be at least 20 bytes.
write_len	uint32_t	Length of the output buffer.
read_ptr	uint32_t	Pointer to the r-address.
read_len	uint32_t	The length of the r-address.

Return Code

Type	Description
int64_t	The number of bytes written (the length of the output r-address). If negative, an error: OUT_OF_BOUNDS - pointers/lengths specified outside of hook memory. INVALID_ARGUMENT - read_ptr pointed at something which wasn't a valid r-address. TOO_SMALL - write_len was not large enough to store produced Account ID. (Should be 20 bytes). TOO_BIG - read_len was longer than an r-address can be.