Function gcore::msg::send

pub fn send(
    destination: ActorId,
    payload: &[u8],
    value: u128,
) -> Result<MessageId>

Send a new message to the program or user.

Gear allows programs to communicate with each other and users via messages. For example, the send function allows sending such messages.

The first argument is the address of the target account (ActorId). The second argument is the payload buffer. The last argument is the value to be transferred from the current program account to the message target account.

Send transaction will be posted after processing is finished, similar to the reply message reply.

Examples

Send a message with value to the arbitrary address (don’t repeat it in your program!):

use gcore::msg;

#[no_mangle]
extern "C" fn handle() {
    // Receiver id is collected from bytes from 0 to 31
    let id: [u8; 32] = core::array::from_fn(|i| i as u8);
    msg::send(id.into(), b"HELLO", 42).expect("Unable to send");
}

See also

• reply function sends a new message as a reply to the message that is currently being processed.
• send_init, send_push, and send_commit functions allow forming a message to send in parts.