/
replace_deposit_for_burn.rs
167 lines (140 loc) · 5.48 KB
/
replace_deposit_for_burn.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.
*/
//! ReplaceDepositForBurn instruction handler
use {
crate::{
program,
token_messenger::{
burn_message::BurnMessage, error::TokenMessengerError, events::DepositForBurn,
state::TokenMessenger,
},
},
anchor_lang::prelude::*,
message_transmitter::{
cpi::accounts::ReplaceMessageContext, instructions::ReplaceMessageParams, message::Message,
state::MessageTransmitter,
},
};
// Instruction accounts
#[event_cpi]
#[derive(Accounts)]
pub struct ReplaceDepositForBurnContext<'info> {
#[account()]
pub owner: Signer<'info>,
#[account(mut)]
pub event_rent_payer: Signer<'info>,
/// CHECK: empty PDA, used to check that replaceMessage was called by TokenMessenger
#[account(
seeds = [b"sender_authority"],
bump = token_messenger.authority_bump,
)]
pub sender_authority_pda: UncheckedAccount<'info>,
#[account(mut)]
pub message_transmitter: Box<Account<'info, MessageTransmitter>>,
#[account()]
pub token_messenger: Box<Account<'info, TokenMessenger>>,
/// CHECK: Account to store MessageSent event data in. Any non-PDA uninitialized address.
#[account(mut)]
pub message_sent_event_data: Signer<'info>,
pub message_transmitter_program:
Program<'info, message_transmitter::program::MessageTransmitter>,
pub token_messenger_minter_program: Program<'info, program::TokenMessengerMinter>,
pub system_program: Program<'info, System>,
}
// Instruction parameters
#[derive(AnchorSerialize, AnchorDeserialize, Clone)]
pub struct ReplaceDepositForBurnParams {
pub original_message: Vec<u8>,
pub original_attestation: Vec<u8>,
pub new_destination_caller: Pubkey,
pub new_mint_recipient: Pubkey,
}
// Instruction handler
pub fn replace_deposit_for_burn(
ctx: Context<ReplaceDepositForBurnContext>,
params: &ReplaceDepositForBurnParams,
) -> Result<u64> {
let message_transmitter = ctx.accounts.message_transmitter.as_ref();
let token_messenger = ctx.accounts.token_messenger.as_ref();
// validate original_message bytes and initialize the Message
let message = Message::new(message_transmitter.version, ¶ms.original_message)?;
// extract BurnMessage from the Message body
let burn_message =
BurnMessage::new(token_messenger.message_body_version, message.message_body())?;
// validate original_message_sender
let original_message_sender = burn_message.message_sender()?;
require_keys_eq!(
original_message_sender,
ctx.accounts.owner.key(),
TokenMessengerError::InvalidSender
);
require_keys_neq!(
params.new_mint_recipient,
Pubkey::default(),
TokenMessengerError::InvalidMintRecipient
);
// format new BurnMessage
let burn_token = burn_message.burn_token()?;
let amount = burn_message.amount()?;
let new_message_body = BurnMessage::format_message(
token_messenger.message_body_version,
&burn_token,
¶ms.new_mint_recipient,
amount,
&original_message_sender,
)?;
// CPI into Message Transmitter
let cpi_program = ctx.accounts.message_transmitter_program.to_account_info();
// prepare context for the CPI call
let cpi_accounts = ReplaceMessageContext {
event_rent_payer: ctx.accounts.event_rent_payer.to_account_info(),
sender_authority_pda: ctx.accounts.sender_authority_pda.to_account_info(),
message_transmitter: ctx.accounts.message_transmitter.to_account_info(),
message_sent_event_data: ctx.accounts.message_sent_event_data.to_account_info(),
sender_program: ctx
.accounts
.token_messenger_minter_program
.to_account_info(),
system_program: ctx.accounts.system_program.to_account_info(),
};
let authority_seeds: &[&[&[u8]]] = &[&[
b"sender_authority",
&[ctx.accounts.token_messenger.authority_bump],
]];
let cpi_ctx = CpiContext::new_with_signer(cpi_program, cpi_accounts, authority_seeds);
// call ReplaceMessage on MessageTransmitter and get new nonce
let cpi_params = ReplaceMessageParams {
original_message: params.original_message.clone(),
original_attestation: params.original_attestation.clone(),
new_message_body,
new_destination_caller: params.new_destination_caller,
};
let nonce = message_transmitter::cpi::replace_message(cpi_ctx, cpi_params)?.get();
// emit DepositForBurn event
emit_cpi!(DepositForBurn {
nonce,
burn_token,
amount,
depositor: original_message_sender,
mint_recipient: params.new_mint_recipient,
destination_domain: message.destination_domain()?,
destination_token_messenger: message.recipient()?,
destination_caller: params.new_destination_caller,
});
Ok(nonce)
}