/
send_message.rs
142 lines (126 loc) · 4.12 KB
/
send_message.rs
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/*
* Copyright (c) 2024, Circle Internet Financial LTD All Rights Reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//! SendMessage instruction handler
use {
crate::{
error::MessageTransmitterError, events::MessageSent, message::Message,
state::MessageTransmitter, utils,
},
anchor_lang::prelude::*,
};
// Instruction accounts
#[derive(Accounts)]
#[instruction(params: SendMessageParams)]
pub struct SendMessageContext<'info> {
#[account(mut)]
pub event_rent_payer: Signer<'info>,
#[account(
seeds = [b"sender_authority"],
bump,
seeds::program = sender_program.key()
)]
pub sender_authority_pda: Signer<'info>,
#[account(mut)]
pub message_transmitter: Box<Account<'info, MessageTransmitter>>,
#[account(
init,
payer = event_rent_payer,
space = MessageSent::len(params.message_body.len())?,
)]
pub message_sent_event_data: Box<Account<'info, MessageSent>>,
///CHECK: Sender program address, e.g. TokenMessenger
#[account(
constraint = sender_program.executable
)]
pub sender_program: UncheckedAccount<'info>,
pub system_program: Program<'info, System>,
}
// Instruction parameters
// NOTE: Do not reorder parameters fields. repr(C) is used to fix the layout of the struct
// so SendMessageWithCallerParams can be deserialized as SendMessageParams.
#[repr(C)]
#[derive(AnchorSerialize, AnchorDeserialize, Clone)]
pub struct SendMessageParams {
pub destination_domain: u32,
pub recipient: Pubkey,
pub message_body: Vec<u8>,
}
// Instruction handler
pub fn send_message(ctx: Context<SendMessageContext>, params: &SendMessageParams) -> Result<u64> {
send_message_helper(
ctx.accounts.message_transmitter.as_mut(),
ctx.accounts.message_sent_event_data.as_mut(),
&ctx.accounts.event_rent_payer.key(),
params.destination_domain,
¶ms.recipient,
&Pubkey::default(),
&ctx.accounts.sender_program.key(),
None,
¶ms.message_body,
)
}
/// Validates and formats message and emits MessageSent event
#[allow(clippy::too_many_arguments)]
pub fn send_message_helper(
message_transmitter: &mut MessageTransmitter,
message_sent_event_data: &mut MessageSent,
event_rent_payer: &Pubkey,
destination_domain: u32,
recipient: &Pubkey,
destination_caller: &Pubkey,
sender: &Pubkey,
nonce: Option<u64>,
message_body: &Vec<u8>,
) -> Result<u64> {
require!(
!message_transmitter.paused,
MessageTransmitterError::ProgramPaused
);
require_gte!(
message_transmitter.max_message_body_size as usize,
message_body.len(),
MessageTransmitterError::MessageBodyLimitExceeded
);
require_keys_neq!(
*recipient,
Pubkey::default(),
MessageTransmitterError::InvalidRecipient
);
// increase next_available_nonce
let nonce = if let Some(nonce_value) = nonce {
nonce_value
} else {
let nonce_value = message_transmitter.next_available_nonce;
message_transmitter.next_available_nonce =
utils::checked_add(message_transmitter.next_available_nonce, 1)?;
nonce_value
};
// format message and emit event
message_sent_event_data.rent_payer = *event_rent_payer;
message_sent_event_data.message = Message::format_message(
message_transmitter.version,
message_transmitter.local_domain,
destination_domain,
nonce,
sender,
recipient,
destination_caller,
message_body,
)?;
Ok(nonce)
}