ledger_keylet

Search for a keylet within a specified range on the current ledger

Behaviour

• Read a 34 byte Keylet from the lread_ptr
• Read a 32 byte Keylet from the hread_ptr
• Search the ledger for the first (lowest) Keylet of this type in this range.
• If any matching Keylet is found, write it to write_ptr.

Definition

C

int64_t ledger_keylet (
    uint32_t write_ptr,
    uint32_t write_len,
    uint32_t lread_ptr,
    uint32_t lread_len,
    uint32_t hread_ptr,
    uint32_t hread_len
);

Example

C

//TODO

Parameters

Name	Type	Description
write_ptr	uint32_t	Pointer to a buffer to store the output serialised Keylet. .
write_len	uint32_t	Length of the output buffer. Must be 34 bytes
lread_ptr	uint32_t	Pointer to the 34 byte serialised Keylet that represents the lower boundary of the Keylet range to search.
lread_len	uint32_t	Always 34 bytes
hread_ptr	uint32_t	Pointer to the 34 byte serialised Keylet that represents the upper boundary of the Keylet range to search.
hread_len	uint32_t	Always 34 bytes

Return Code

Type

Description

int64_t

The number of bytes written (34 bytes) on success. If negative, an error: OUT_OF_BOUNDS - pointers/lengths specified outside of hook memory. TOO_SMALL / TOO_BIG - write_len, lread_len or hread_len was not 34 bytes INVALID_ARGUMENT - One or more of the provided Keylets was not a valid serialised Keylet DOES_NOT_MATCH - The two provided Keylets were not of the same Keylet Type. DOESNT_EXIST - No matching Keylet was found in the specified range.