Function casperlabs_contract::ext_ffi::add

pub unsafe extern "C" fn add(
    key_ptr: *const u8, 
    key_size: usize, 
    value_ptr: *const u8, 
    value_size: usize
)

This function adds the provided value (read via de-serializing the bytes in wasm memory from offset value_ptr to value_ptr + value_size) to the current value under the provided key (read via de-serializing the bytes in wasm memory from offset key_ptr to key_ptr + key_size) in the global state. This function will cause a Trap if the key or value fail to de-serialize or if adding to that key is not permitted, or no value presently exists at that key.

Arguments

• key_ptr - pointer to bytes representing the key to write to
• key_size - size of the key (in bytes)
• value_ptr - pointer to bytes representing the value to write at the key
• value_size - size of the value (in bytes)