192 lines
6.4 KiB
Rust
192 lines
6.4 KiB
Rust
#![cfg(feature = "test-bpf")]
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mod helpers;
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use helpers::*;
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use solana_program_test::*;
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use solana_sdk::{
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pubkey::Pubkey,
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signature::{Keypair, Signer},
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transaction::Transaction,
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};
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use spl_token::instruction::approve;
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use spl_token_lending::{
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instruction::repay_reserve_liquidity,
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math::{Decimal, TryAdd, TryDiv, TryMul, TrySub},
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processor::process_instruction,
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state::{INITIAL_COLLATERAL_RATIO, SLOTS_PER_YEAR},
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};
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const LAMPORTS_TO_SOL: u64 = 1_000_000_000;
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const FRACTIONAL_TO_USDC: u64 = 1_000_000;
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#[tokio::test]
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async fn test_success() {
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let mut test = ProgramTest::new(
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"spl_token_lending",
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spl_token_lending::id(),
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processor!(process_instruction),
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);
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// limit to track compute unit increase
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test.set_bpf_compute_max_units(51_000);
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const INITIAL_SOL_RESERVE_SUPPLY_LAMPORTS: u64 = 100 * LAMPORTS_TO_SOL;
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const INITIAL_USDC_RESERVE_SUPPLY_FRACTIONAL: u64 = 100 * FRACTIONAL_TO_USDC;
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const OBLIGATION_LOAN: u64 = 10 * FRACTIONAL_TO_USDC;
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const OBLIGATION_COLLATERAL: u64 = 10 * LAMPORTS_TO_SOL * INITIAL_COLLATERAL_RATIO;
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let user_accounts_owner = Keypair::new();
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let user_transfer_authority = Keypair::new();
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let sol_usdc_dex_market = TestDexMarket::setup(&mut test, TestDexMarketPair::SOL_USDC);
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let usdc_mint = add_usdc_mint(&mut test);
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let lending_market = add_lending_market(&mut test, usdc_mint.pubkey);
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let usdc_reserve = add_reserve(
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&mut test,
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&user_accounts_owner,
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&lending_market,
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AddReserveArgs {
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config: TEST_RESERVE_CONFIG,
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initial_borrow_rate: 1,
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liquidity_amount: INITIAL_USDC_RESERVE_SUPPLY_FRACTIONAL,
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liquidity_mint_pubkey: usdc_mint.pubkey,
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liquidity_mint_decimals: usdc_mint.decimals,
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borrow_amount: OBLIGATION_LOAN * 101 / 100,
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user_liquidity_amount: OBLIGATION_LOAN,
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..AddReserveArgs::default()
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},
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);
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let sol_reserve = add_reserve(
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&mut test,
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&user_accounts_owner,
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&lending_market,
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AddReserveArgs {
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config: TEST_RESERVE_CONFIG,
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slots_elapsed: SLOTS_PER_YEAR,
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liquidity_amount: INITIAL_SOL_RESERVE_SUPPLY_LAMPORTS,
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liquidity_mint_decimals: 9,
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liquidity_mint_pubkey: spl_token::native_mint::id(),
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dex_market_pubkey: Some(sol_usdc_dex_market.pubkey),
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collateral_amount: OBLIGATION_COLLATERAL,
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..AddReserveArgs::default()
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},
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);
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let obligation = add_obligation(
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&mut test,
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&user_accounts_owner,
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&lending_market,
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AddObligationArgs {
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borrow_reserve: &usdc_reserve,
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collateral_reserve: &sol_reserve,
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collateral_amount: OBLIGATION_COLLATERAL,
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borrowed_liquidity_wads: Decimal::from(OBLIGATION_LOAN),
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},
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);
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let (mut banks_client, payer, recent_blockhash) = test.start().await;
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let initial_user_collateral_balance =
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get_token_balance(&mut banks_client, sol_reserve.user_collateral_account).await;
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let mut transaction = Transaction::new_with_payer(
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&[
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approve(
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&spl_token::id(),
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&usdc_reserve.user_liquidity_account,
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&user_transfer_authority.pubkey(),
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&user_accounts_owner.pubkey(),
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&[],
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OBLIGATION_LOAN,
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)
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.unwrap(),
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approve(
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&spl_token::id(),
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&obligation.token_account,
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&user_transfer_authority.pubkey(),
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&user_accounts_owner.pubkey(),
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&[],
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OBLIGATION_COLLATERAL,
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)
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.unwrap(),
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repay_reserve_liquidity(
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spl_token_lending::id(),
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OBLIGATION_LOAN,
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usdc_reserve.user_liquidity_account,
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sol_reserve.user_collateral_account,
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usdc_reserve.pubkey,
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usdc_reserve.liquidity_supply,
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sol_reserve.pubkey,
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sol_reserve.collateral_supply,
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obligation.pubkey,
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obligation.token_mint,
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obligation.token_account,
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lending_market.pubkey,
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lending_market.authority,
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user_transfer_authority.pubkey(),
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),
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],
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Some(&payer.pubkey()),
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);
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transaction.sign(
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&[&payer, &user_accounts_owner, &user_transfer_authority],
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recent_blockhash,
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);
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assert!(banks_client.process_transaction(transaction).await.is_ok());
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let collateral_received =
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get_token_balance(&mut banks_client, sol_reserve.user_collateral_account).await
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- initial_user_collateral_balance;
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assert!(collateral_received > 0);
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let borrow_reserve_state = usdc_reserve.get_state(&mut banks_client).await;
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assert!(borrow_reserve_state.cumulative_borrow_rate_wads > Decimal::one());
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let obligation_state = obligation.get_state(&mut banks_client).await;
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assert_eq!(
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obligation_state.cumulative_borrow_rate_wads,
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borrow_reserve_state.cumulative_borrow_rate_wads
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);
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assert_eq!(
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obligation_state.borrowed_liquidity_wads,
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borrow_reserve_state.liquidity.borrowed_amount_wads
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);
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// use cumulative borrow rate directly since test rate starts at 1.0
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let expected_obligation_interest = obligation_state
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.cumulative_borrow_rate_wads
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.try_mul(OBLIGATION_LOAN)
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.unwrap()
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.try_sub(Decimal::from(OBLIGATION_LOAN))
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.unwrap();
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assert_eq!(
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obligation_state.borrowed_liquidity_wads,
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expected_obligation_interest
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);
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let expected_obligation_total = Decimal::from(OBLIGATION_LOAN)
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.try_add(expected_obligation_interest)
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.unwrap();
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let expected_obligation_repaid_percent = Decimal::from(OBLIGATION_LOAN)
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.try_div(expected_obligation_total)
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.unwrap();
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let expected_collateral_received = expected_obligation_repaid_percent
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.try_mul(OBLIGATION_COLLATERAL)
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.unwrap()
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.try_floor_u64()
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.unwrap();
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assert_eq!(collateral_received, expected_collateral_received);
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let expected_collateral_remaining = OBLIGATION_COLLATERAL - expected_collateral_received;
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assert_eq!(
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obligation_state.deposited_collateral_tokens,
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expected_collateral_remaining
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);
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}
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