ITS Program Reference

pub struct InterchainTokenService {
    pub its_hub_address: String,
    pub chain_name: String,
    pub paused: bool,
    pub trusted_chains: Vec<String>,
    pub bump: u8,
}

pub struct TokenManager {
    pub ty: Type,
    pub token_id: [u8; 32],
    pub token_address: Pubkey,             // the mint
    pub associated_token_account: Pubkey,  // the token manager's token account
    pub flow_slot: FlowState,
    pub bump: u8,
}

pub struct FlowState {
    pub flow_limit: Option<u64>,
    pub flow_in: u64,
    pub flow_out: u64,
    pub epoch: u64, // the 6-hour window that flow_in and flow_out count
}

use anchor_spl::associated_token::get_associated_token_address_with_program_id;
use solana_axelar_its::{InterchainTokenService, TokenManager};

fn interchain_transfer_accounts(
    token_id: [u8; 32],
    token_mint: Pubkey,
    token_program: Pubkey,
    sender: Pubkey,
) {
    let its_root_pda = InterchainTokenService::find_pda().0;
    let its_event_authority = solana_axelar_its::EVENT_AUTHORITY_AND_BUMP.0;
    let token_manager_pda = TokenManager::find_pda(token_id, its_root_pda).0;
    let token_manager_ata =
        get_associated_token_address_with_program_id(&token_manager_pda, &token_mint, &token_program);
    let sender_token_account =
        get_associated_token_address_with_program_id(&sender, &token_mint, &token_program);

    let gateway_root_pda = solana_axelar_gateway::GatewayConfig::find_pda().0;
    let gateway_event_authority = solana_axelar_gateway::EVENT_AUTHORITY_AND_BUMP.0;
    // ITS's signing PDA for the gateway, derived from the ITS program ID
    let call_contract_signing_pda =
        solana_axelar_gateway::CallContractSigner::find_pda(&solana_axelar_its::ID).0;

    let gas_treasury = Pubkey::find_program_address(
        &[solana_axelar_gas_service::state::Treasury::SEED_PREFIX],
        &solana_axelar_gas_service::ID,
    )
    .0;
    let gas_event_authority = solana_axelar_gas_service::EVENT_AUTHORITY_AND_BUMP.0;
}

pub struct InterchainTransferSent {
    pub token_id: [u8; 32],
    pub source_address: Pubkey,
    pub source_token_account: Pubkey,
    pub destination_chain: String,
    pub destination_address: Vec<u8>,
    pub amount: u64,
    pub data_hash: Option<[u8; 32]>,
}

pub struct InterchainTransferReceived {
    pub command_id: [u8; 32],
    pub token_id: [u8; 32],
    pub source_chain: String,
    pub source_address: Vec<u8>,
    pub destination_address: Pubkey,
    pub destination_token_account: Pubkey,
    pub amount: u64,
    pub data_hash: Option<[u8; 32]>,
}