solana-program-library/token-lending/program/tests/flash_loan.rs

226 lines
7.5 KiB
Rust

#![allow(clippy::integer_arithmetic)]
#![cfg(feature = "test-sbf")]
mod helpers;
use helpers::*;
use solana_program::instruction::AccountMeta;
use solana_program_test::*;
use solana_sdk::{
pubkey::Pubkey,
signature::{Keypair, Signer},
transaction::{Transaction, TransactionError},
};
use spl_token::solana_program::instruction::InstructionError;
use spl_token_lending::{
error::LendingError, instruction::flash_loan, processor::process_instruction,
};
#[tokio::test]
async fn test_success() {
let mut test = ProgramTest::new(
"spl_token_lending",
spl_token_lending::id(),
processor!(process_instruction),
);
// limit to track compute unit increase
test.set_compute_max_units(50_000);
const FLASH_LOAN_AMOUNT: u64 = 1_000 * FRACTIONAL_TO_USDC;
const FEE_AMOUNT: u64 = 3_000_000;
const HOST_FEE_AMOUNT: u64 = 600_000;
let receiver_program_account = Keypair::new();
let receiver_program_id = receiver_program_account.pubkey();
test.prefer_bpf(false);
test.add_program(
"flash_loan_receiver",
receiver_program_id,
processor!(helpers::flash_loan_receiver::process_instruction),
);
let user_accounts_owner = Keypair::new();
let lending_market = add_lending_market(&mut test);
let mut reserve_config = TEST_RESERVE_CONFIG;
reserve_config.fees.flash_loan_fee_wad = 3_000_000_000_000_000;
let usdc_mint = add_usdc_mint(&mut test);
let usdc_oracle = add_usdc_oracle(&mut test);
let usdc_test_reserve = add_reserve(
&mut test,
&lending_market,
&usdc_oracle,
&user_accounts_owner,
AddReserveArgs {
liquidity_amount: FLASH_LOAN_AMOUNT,
liquidity_mint_pubkey: usdc_mint.pubkey,
liquidity_mint_decimals: usdc_mint.decimals,
config: reserve_config,
..AddReserveArgs::default()
},
);
let (receiver_authority_pubkey, _) =
Pubkey::find_program_address(&[b"flashloan"], &receiver_program_id);
let program_owned_token_account = add_account_for_program(
&mut test,
&receiver_authority_pubkey,
FEE_AMOUNT,
&usdc_mint.pubkey,
);
let (mut banks_client, payer, recent_blockhash) = test.start().await;
let initial_liquidity_supply =
get_token_balance(&mut banks_client, usdc_test_reserve.liquidity_supply_pubkey).await;
assert_eq!(initial_liquidity_supply, FLASH_LOAN_AMOUNT);
let usdc_reserve = usdc_test_reserve.get_state(&mut banks_client).await;
let initial_available_amount = usdc_reserve.liquidity.available_amount;
assert_eq!(initial_available_amount, FLASH_LOAN_AMOUNT);
let initial_token_balance =
get_token_balance(&mut banks_client, program_owned_token_account).await;
assert_eq!(initial_token_balance, FEE_AMOUNT);
let mut transaction = Transaction::new_with_payer(
&[flash_loan(
spl_token_lending::id(),
FLASH_LOAN_AMOUNT,
usdc_test_reserve.liquidity_supply_pubkey,
program_owned_token_account,
usdc_test_reserve.pubkey,
usdc_test_reserve.liquidity_fee_receiver_pubkey,
usdc_test_reserve.liquidity_host_pubkey,
lending_market.pubkey,
receiver_program_id,
vec![AccountMeta::new_readonly(receiver_authority_pubkey, false)],
)],
Some(&payer.pubkey()),
);
transaction.sign(&[&payer], recent_blockhash);
assert!(banks_client.process_transaction(transaction).await.is_ok());
let usdc_reserve = usdc_test_reserve.get_state(&mut banks_client).await;
assert_eq!(
usdc_reserve.liquidity.available_amount,
initial_available_amount
);
let (total_fee, host_fee) = usdc_reserve
.config
.fees
.calculate_flash_loan_fees(FLASH_LOAN_AMOUNT.into())
.unwrap();
assert_eq!(total_fee, FEE_AMOUNT);
assert_eq!(host_fee, HOST_FEE_AMOUNT);
let liquidity_supply =
get_token_balance(&mut banks_client, usdc_test_reserve.liquidity_supply_pubkey).await;
assert_eq!(liquidity_supply, initial_liquidity_supply);
let token_balance = get_token_balance(&mut banks_client, program_owned_token_account).await;
assert_eq!(token_balance, initial_token_balance - FEE_AMOUNT);
let fee_balance = get_token_balance(
&mut banks_client,
usdc_test_reserve.liquidity_fee_receiver_pubkey,
)
.await;
assert_eq!(fee_balance, FEE_AMOUNT - HOST_FEE_AMOUNT);
let host_fee_balance =
get_token_balance(&mut banks_client, usdc_test_reserve.liquidity_host_pubkey).await;
assert_eq!(host_fee_balance, HOST_FEE_AMOUNT);
}
#[tokio::test]
async fn test_failure() {
let mut test = ProgramTest::new(
"spl_token_lending",
spl_token_lending::id(),
processor!(process_instruction),
);
const FLASH_LOAN_AMOUNT: u64 = 1_000 * FRACTIONAL_TO_USDC;
const FEE_AMOUNT: u64 = 3_000_000;
let flash_loan_receiver_program_keypair = Keypair::new();
let flash_loan_receiver_program_id = flash_loan_receiver_program_keypair.pubkey();
test.prefer_bpf(false);
test.add_program(
"flash_loan_receiver",
flash_loan_receiver_program_id,
processor!(helpers::flash_loan_receiver::process_instruction),
);
let user_accounts_owner = Keypair::new();
let lending_market = add_lending_market(&mut test);
let mut reserve_config = TEST_RESERVE_CONFIG;
reserve_config.fees.flash_loan_fee_wad = 3_000_000_000_000_000;
let usdc_mint = add_usdc_mint(&mut test);
let usdc_oracle = add_usdc_oracle(&mut test);
let usdc_test_reserve = add_reserve(
&mut test,
&lending_market,
&usdc_oracle,
&user_accounts_owner,
AddReserveArgs {
liquidity_amount: FLASH_LOAN_AMOUNT,
liquidity_mint_pubkey: usdc_mint.pubkey,
liquidity_mint_decimals: usdc_mint.decimals,
config: reserve_config,
..AddReserveArgs::default()
},
);
let (receiver_authority_pubkey, _) =
Pubkey::find_program_address(&[b"flashloan"], &flash_loan_receiver_program_id);
let program_owned_token_account = add_account_for_program(
&mut test,
&receiver_authority_pubkey,
FEE_AMOUNT - 1,
&usdc_mint.pubkey,
);
let (mut banks_client, payer, recent_blockhash) = test.start().await;
let initial_token_balance =
get_token_balance(&mut banks_client, program_owned_token_account).await;
assert_eq!(initial_token_balance, FEE_AMOUNT - 1);
let mut transaction = Transaction::new_with_payer(
&[flash_loan(
spl_token_lending::id(),
FLASH_LOAN_AMOUNT,
usdc_test_reserve.liquidity_supply_pubkey,
program_owned_token_account,
usdc_test_reserve.pubkey,
usdc_test_reserve.liquidity_fee_receiver_pubkey,
usdc_test_reserve.liquidity_host_pubkey,
lending_market.pubkey,
flash_loan_receiver_program_id,
vec![AccountMeta::new_readonly(receiver_authority_pubkey, false)],
)],
Some(&payer.pubkey()),
);
transaction.sign(&[&payer], recent_blockhash);
assert_eq!(
banks_client
.process_transaction(transaction)
.await
.unwrap_err()
.unwrap(),
TransactionError::InstructionError(
0,
InstructionError::Custom(LendingError::NotEnoughLiquidityAfterFlashLoan as u32)
)
);
}