ext_storage_read

[kogeler]

Gets the given key from storage, placing the value into a buffer and returning the number of bytes that the

entry in storage has beyond the offset.

E.1.3.1 Version 1 - Prototype

(func $ext_storage_read_version_1 (param $key i64) (param $value_out i64) (param $offset i32) (result i64))

Arguments :

• key: a pointer-size as defined in Definition E.2 containing the key.
• value_out: a pointer-size as defined in Definition E.2 containing the buffer to which the value will be written to. This function will never write more then the length of the buffer, even if the value's length is bigger.
• offset: an i32 integer containing the offset beyond the value should be read from.
• result: a pointer-size as defined in Definition E.2 indicating the SCALE encoded Option as defined in Definition B.4 containing the number of bytes written into the value_out buffer. Returns None if the entry does not exists.

Aha! Link: https://soramitsucoltd.aha.io/requirements/PRE-43-3