grin-wallet/controller/tests/transaction.rs

// Copyright 2021 The Grin Developers
// 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.

//! tests for transactions building within core::libtx
#[macro_use]
extern crate log;
extern crate grin_wallet_controller as wallet;
extern crate grin_wallet_impls as impls;
extern crate grin_wallet_libwallet as libwallet;

use grin_core as core;

use self::core::core::transaction;
use self::core::core::Transaction;
use self::core::global;
use self::libwallet::{InitTxArgs, OutputStatus, Slate, SlateState, GRIN_BLOCK_HEADER_VERSION};
use impls::test_framework::{self, LocalWalletClient};
use std::convert::TryInto;
use std::path::PathBuf;
use std::sync::atomic::Ordering;
use std::thread;
use std::time::Duration;

mod common;
use common::{clean_output_dir, create_wallet_proxy, setup};
use grin_wallet_api::Owner;
use libwallet::InitTxSendArgs;

/// Exercises the Transaction API fully with a test NodeClient operating
/// directly on a chain instance
/// Callable with any type of wallet
fn basic_transaction_api(test_dir: &'static str) -> Result<(), libwallet::Error> {
	// Create a new proxy to simulate server and wallet responses
	let mut wallet_proxy = create_wallet_proxy(test_dir);
	let chain = wallet_proxy.chain.clone();
	let stopper = wallet_proxy.running.clone();

	create_wallet_and_add!(
		client1,
		wallet1,
		mask1_i,
		test_dir,
		"wallet1",
		None,
		&mut wallet_proxy,
		true,
		api1
	);
	let mask1 = mask1_i.as_ref();
	println!("Mask1: {:?}", mask1);
	create_wallet_and_add!(
		client2,
		wallet2,
		mask2_i,
		test_dir,
		"wallet2",
		None,
		&mut wallet_proxy,
		false,
		api2
	);
	let mask2 = mask2_i.as_ref();
	println!("Mask2: {:?}", mask2);

	// Set the wallet proxy listener running
	thread::spawn(move || {
		if let Err(e) = wallet_proxy.run() {
			error!("Wallet Proxy error: {}", e);
		}
	});

	// few values to keep things shorter
	let reward = core::consensus::REWARD;
	let cm = global::coinbase_maturity();
	// mine a few blocks
	let _ = test_framework::award_blocks_to_wallet(&chain, wallet1.clone(), mask1, 10, false);

	// Check wallet1 contents are as expected
	{
		let (wallet1_refreshed, wallet1_info) = api1.retrieve_summary_info(mask1, true, 1)?;
		debug!(
			"Wallet 1 Info Pre-Transaction, after {} blocks: {:?}",
			wallet1_info.last_confirmed_height, wallet1_info
		);
		assert!(wallet1_refreshed);
		assert_eq!(
			wallet1_info.amount_currently_spendable,
			(wallet1_info.last_confirmed_height - cm) * reward
		);
		assert_eq!(wallet1_info.amount_immature, cm * reward);
	}

	// assert wallet contents
	// and a single use api for a send command
	let amount = 60_000_000_000;
	let header_version = core::consensus::header_version(chain.head().unwrap().height).0;
	let mut slate = Slate::blank(1, false);
	{
		// Do not allow to send 0
		let error = api1
			.init_send_tx(
				mask1,
				InitTxArgs {
					amount: 0,
					..Default::default()
				},
			)
			.unwrap_err();
		assert_eq!(error, libwallet::Error::InvalidAmount);

		// Result amount can not be 0 when amount includes fee
		let mut init_args = InitTxArgs {
			amount_includes_fee: Some(true),
			amount: 23_000_000,
			estimate_only: Some(true),
			..Default::default()
		};
		let est = api1.init_send_tx(mask1, init_args.clone())?;
		assert_eq!(init_args.amount, est.fee_fields.fee());

		init_args.estimate_only = None;
		let error = api1.init_send_tx(mask1, init_args).unwrap_err();
		assert_eq!(
			error,
			libwallet::Error::GenericError(
				"Transaction amount is too small to include fee".to_string()
			)
		);

		// note this will increment the block count as part of the transaction "Posting"
		let args = InitTxArgs {
			src_acct_name: None,
			amount,
			minimum_confirmations: 2,
			max_outputs: 500,
			num_change_outputs: 1,
			selection_strategy_is_use_all: true,
			..Default::default()
		};
		let slate_i = api1.init_send_tx(mask1, args)?;

		assert_eq!(slate_i.state, SlateState::Standard1);
		assert_eq!(slate_i.version_info.block_header_version, header_version);

		wallet::controller::foreign_single_use(
			wallet2.clone(),
			PathBuf::from(test_dir),
			mask2_i.clone(),
			|api| {
				let mut zero_amount_slate = slate_i.clone();
				zero_amount_slate.amount = 0;
				assert_eq!(
					api.receive_tx(&zero_amount_slate, None, None).unwrap_err(),
					libwallet::Error::InvalidAmount
				);
				Ok(())
			},
		)?;

		// Check we are creating a tx with the expected lock_height of 0.
		// We will check this produces a Plain kernel later.
		assert_eq!(0, slate.kernel_features);

		slate = client1.send_tx_slate_direct("wallet2", &slate_i)?;
		assert_eq!(slate.state, SlateState::Standard2);

		// wallet2 already has this slate, so accepted versions fail on the duplicate check
		for bhv in 1..=GRIN_BLOCK_HEADER_VERSION + 1 {
			let mut s = slate_i.clone();
			s.version_info.block_header_version = bhv;
			let res = wallet::controller::foreign_single_use(
				wallet2.clone(),
				PathBuf::from(test_dir),
				mask2_i.clone(),
				|api| api.receive_tx(&s, None, None).map(|_| ()),
			);
			if bhv <= GRIN_BLOCK_HEADER_VERSION {
				assert!(matches!(
					res,
					Err(libwallet::Error::TransactionAlreadyReceived(_))
				));
			} else {
				assert!(matches!(res, Err(libwallet::Error::Compatibility(_))));
			}
		}
		api1.tx_lock_outputs(mask1, &slate)?;
		slate = api1.finalize_tx(mask1, &slate)?;
		assert_eq!(slate.state, SlateState::Standard3);

		// Check we have a single kernel and that it is a Plain kernel (no lock_height).
		// fees for 7 inputs, 2 outputs, 1 kernel (weight 52)
		assert_eq!(slate.tx_or_err()?.kernels().len(), 1);
		assert_eq!(
			slate
				.tx_or_err()?
				.kernels()
				.first()
				.map(|k| k.features)
				.unwrap(),
			transaction::KernelFeatures::Plain {
				fee: 26_000_000.into()
			}
		);
	}

	// Check transaction log for wallet 1
	{
		let (_, wallet1_info) = api1.retrieve_summary_info(mask1, true, 1)?;
		let (refreshed, txs) = api1.retrieve_txs(mask1, true, None, None, None)?;
		assert!(refreshed);
		let fee = core::libtx::tx_fee(
			wallet1_info.last_confirmed_height as usize - cm as usize,
			2,
			1,
		);
		// we should have a transaction entry for this slate
		let tx = txs.iter().find(|t| t.tx_slate_id == Some(slate.id));
		assert!(tx.is_some());
		let tx = tx.unwrap();
		assert!(!tx.confirmed);
		assert!(tx.confirmation_ts.is_none());
		assert_eq!(tx.amount_debited - tx.amount_credited, fee + amount);
		println!("tx: {:?}", tx);
		assert_eq!(Some(fee.try_into().unwrap()), tx.fee);
	}

	// Check transaction log for wallet 2
	{
		let (refreshed, txs) = api2.retrieve_txs(mask2, true, None, None, None)?;
		assert!(refreshed);
		// we should have a transaction entry for this slate
		let tx = txs.iter().find(|t| t.tx_slate_id == Some(slate.id));
		assert!(tx.is_some());
		let tx = tx.unwrap();
		assert!(!tx.confirmed);
		assert!(tx.confirmation_ts.is_none());
		assert_eq!(amount, tx.amount_credited);
		assert_eq!(0, tx.amount_debited);
		assert_eq!(None, tx.fee);
	}

	// post transaction
	api1.post_tx(mask1, &slate, false)?;

	// Check wallet1 contents are as expected
	{
		let (wallet1_refreshed, wallet1_info) = api1.retrieve_summary_info(mask1, true, 1)?;
		debug!(
			"Wallet 1 Info Post Transaction, after {} blocks: {:?}",
			wallet1_info.last_confirmed_height, wallet1_info
		);
		let fee = core::libtx::tx_fee(
			wallet1_info.last_confirmed_height as usize - 1 - cm as usize,
			2,
			1,
		);
		assert!(wallet1_refreshed);
		// wallet 1 received fees, so amount should be the same
		assert_eq!(
			wallet1_info.total,
			amount * wallet1_info.last_confirmed_height - amount
		);
		assert_eq!(
			wallet1_info.amount_currently_spendable,
			(wallet1_info.last_confirmed_height - cm) * reward - amount - fee
		);
		assert_eq!(wallet1_info.amount_immature, cm * reward + fee);

		// check tx log entry is confirmed
		let (refreshed, txs) = api1.retrieve_txs(mask1, true, None, None, None)?;
		assert!(refreshed);
		let tx = txs.iter().find(|t| t.tx_slate_id == Some(slate.id));
		assert!(tx.is_some());
		let tx = tx.unwrap();
		assert!(tx.confirmed);
		assert!(tx.confirmation_ts.is_some());
	}

	// mine a few more blocks
	let _ = test_framework::award_blocks_to_wallet(&chain, wallet1.clone(), mask1, 3, false);

	// refresh wallets and retrieve info/tests for each wallet after maturity
	{
		let (wallet1_refreshed, wallet1_info) = api1.retrieve_summary_info(mask1, true, 1)?;
		debug!("Wallet 1 Info: {:?}", wallet1_info);
		assert!(wallet1_refreshed);
		assert_eq!(
			wallet1_info.total,
			amount * wallet1_info.last_confirmed_height - amount
		);
		assert_eq!(
			wallet1_info.amount_currently_spendable,
			(wallet1_info.last_confirmed_height - cm - 1) * reward
		);
	}

	{
		let (wallet2_refreshed, wallet2_info) = api2.retrieve_summary_info(mask2, true, 1)?;
		assert!(wallet2_refreshed);
		assert_eq!(wallet2_info.amount_currently_spendable, amount);

		// check tx log entry is confirmed
		let (refreshed, txs) = api2.retrieve_txs(mask2, true, None, None, None)?;
		assert!(refreshed);
		let tx = txs.iter().find(|t| t.tx_slate_id == Some(slate.id));
		assert!(tx.is_some());
		let tx = tx.unwrap();
		assert!(tx.confirmed);
		assert!(tx.confirmation_ts.is_some());
	}

	// Estimate fee and locked amount for a transaction
	{
		let init_args = InitTxArgs {
			src_acct_name: None,
			amount: amount * 2,
			minimum_confirmations: 2,
			max_outputs: 500,
			num_change_outputs: 1,
			selection_strategy_is_use_all: true,
			estimate_only: Some(true),
			..Default::default()
		};
		let est = api1.init_send_tx(mask1, init_args)?;
		assert_eq!(est.amount, 600_000_000_000);
		// fees for 5 inputs, 2 outputs, 1 kernel (weight 50)
		assert_eq!(est.fee_fields.fee(), 25_000_000);

		let init_args = InitTxArgs {
			src_acct_name: None,
			amount: amount * 2,
			minimum_confirmations: 2,
			max_outputs: 500,
			num_change_outputs: 1,
			selection_strategy_is_use_all: false, //select smallest number
			estimate_only: Some(true),
			..Default::default()
		};
		let est = api1.init_send_tx(mask1, init_args)?;
		assert_eq!(est.amount, 180_000_000_000);
		// fees for 3 inputs, 2 outputs, 1 kernel (weight 48)
		assert_eq!(est.fee_fields.fee(), 24_000_000);
	}

	// Send another transaction, but don't post to chain immediately and use
	// the stored transaction instead
	{
		// note this will increment the block count as part of the transaction "Posting"
		let args = InitTxArgs {
			src_acct_name: None,
			amount: amount * 2,
			minimum_confirmations: 2,
			max_outputs: 500,
			num_change_outputs: 1,
			selection_strategy_is_use_all: true,
			..Default::default()
		};
		let slate_i = api1.init_send_tx(mask1, args)?;
		slate = client1.send_tx_slate_direct("wallet2", &slate_i)?;
		api1.tx_lock_outputs(mask1, &slate)?;
		slate = api1.finalize_tx(mask1, &slate)?;

		let (refreshed, _wallet1_info) = api1.retrieve_summary_info(mask1, true, 1)?;
		assert!(refreshed);
		let (_, txs) = api1.retrieve_txs(mask1, true, None, None, None)?;
		// find the transaction
		let tx = txs
			.iter()
			.find(|t| t.tx_slate_id == Some(slate.id))
			.unwrap();
		let stored_tx_slate = api1
			.get_stored_tx(mask1, None, Some(&tx.tx_slate_id.unwrap()))?
			.unwrap();
		api1.post_tx(mask1, &stored_tx_slate, false)?;
		let (_, wallet1_info) = api1.retrieve_summary_info(mask1, true, 1)?;
		// should be mined now
		assert_eq!(
			wallet1_info.total,
			amount * wallet1_info.last_confirmed_height - amount * 3
		);
	}

	// mine a few more blocks
	let _ = test_framework::award_blocks_to_wallet(&chain, wallet1.clone(), mask1, 3, false);

	// check wallet2 has stored transaction
	{
		let (wallet2_refreshed, wallet2_info) = api2.retrieve_summary_info(mask2, true, 1)?;
		assert!(wallet2_refreshed);
		assert_eq!(wallet2_info.amount_currently_spendable, amount * 3);

		// check tx log entry is confirmed
		let (refreshed, txs) = api2.retrieve_txs(mask2, true, None, None, None)?;
		assert!(refreshed);
		let tx = txs.iter().find(|t| t.tx_slate_id == Some(slate.id));
		assert!(tx.is_some());
		let tx = tx.unwrap();
		assert!(tx.confirmed);
		assert!(tx.confirmation_ts.is_some());
	}

	// try to send a transaction with amount inclusive of fees, but amount too
	// small to cover fees. Should fail.
	{
		let args = InitTxArgs {
			src_acct_name: None,
			amount: 1,
			amount_includes_fee: Some(true),
			minimum_confirmations: 2,
			max_outputs: 500,
			num_change_outputs: 1,
			selection_strategy_is_use_all: true,
			..Default::default()
		};
		let res = api1.init_send_tx(mask1, args);
		assert!(res.is_err());
	}

	// Multiple send attempts, make sure same outputs not locked.
	// Fail sending without starting Tor
	api2.set_tor_config(Some(grin_wallet_config::TorConfig {
		use_integrated: Some(false),
		socks_proxy_addr: "invalid".into(),
		..Default::default()
	}))?;
	let mut handles = vec![];

	let api2_1 = Owner::new(api2.wallet_inst.clone(), None, api2.config_path());
	handles.push(thread::spawn(move || {
		let args = InitTxArgs {
			src_acct_name: None,
			minimum_confirmations: 2,
			max_outputs: 500,
			num_change_outputs: 1,
			selection_strategy_is_use_all: true,
			amount: 1,
			send_args: Some(InitTxSendArgs {
				dest: "tgrin1xtxavwfgs48ckf3gk8wwgcndmn0nt4tvkl8a7ltyejjcy2mc6nfs9gm2lp".into(),
				post_tx: false,
				fluff: false,
				skip_tor: Some(false),
			}),
			..Default::default()
		};
		api2_1.init_send_tx(None, args)
	}));
	let api2_2 = Owner::new(api2.wallet_inst.clone(), None, api2.config_path());
	handles.push(thread::spawn(move || {
		let args = InitTxArgs {
			src_acct_name: None,
			minimum_confirmations: 2,
			max_outputs: 500,
			num_change_outputs: 1,
			selection_strategy_is_use_all: true,
			amount: 1,
			send_args: Some(InitTxSendArgs {
				dest: "tgrin1xtxavwfgs48ckf3gk8wwgcndmn0nt4tvkl8a7ltyejjcy2mc6nfs9gm2lp".into(),
				post_tx: false,
				fluff: false,
				skip_tor: Some(false),
			}),
			..Default::default()
		};
		api2_2.init_send_tx(None, args)
	}));
	let results: Vec<_> = handles
		.into_iter()
		.map(|handle| handle.join().unwrap())
		.collect();
	assert_eq!(results.iter().filter(|r| { r.is_ok() }).count(), 1);
	let err_res = results.iter().find(|r| r.is_err()).unwrap();
	assert!(matches!(
		err_res.as_ref().err().unwrap(),
		libwallet::Error::NotEnoughFunds { .. }
	));

	// try to build a transaction with amount inclusive of fees. Confirm that tx
	// amount + fee is equal to the originally specified amount
	let amount = 60_000_000_000;
	{
		// note this will increment the block count as part of the transaction "Posting"
		let args = InitTxArgs {
			src_acct_name: None,
			amount,
			amount_includes_fee: Some(true),
			minimum_confirmations: 2,
			max_outputs: 500,
			num_change_outputs: 1,
			selection_strategy_is_use_all: true,
			..Default::default()
		};
		let slate_i = api1.init_send_tx(mask1, args)?;
		assert_eq!(slate_i.state, SlateState::Standard1);
		let total_spend: u64 = slate_i.amount + slate_i.fee_fields.fee();
		assert_eq!(amount, total_spend);
	}

	// let logging finish
	stopper.store(false, Ordering::Relaxed);
	thread::sleep(Duration::from_millis(200));
	Ok(())
}

/// Test rolling back transactions and outputs when a transaction is never
/// posted to a chain
fn tx_rollback(test_dir: &'static str) -> Result<(), libwallet::Error> {
	// Create a new proxy to simulate server and wallet responses
	let mut wallet_proxy = create_wallet_proxy(test_dir);
	let chain = wallet_proxy.chain.clone();
	let stopper = wallet_proxy.running.clone();

	create_wallet_and_add!(
		client1,
		wallet1,
		mask1_i,
		test_dir,
		"wallet1",
		None,
		&mut wallet_proxy,
		false,
		api1
	);
	let mask1 = mask1_i.as_ref();
	create_wallet_and_add!(
		client2,
		wallet2,
		mask2_i,
		test_dir,
		"wallet2",
		None,
		&mut wallet_proxy,
		false,
		api2
	);
	let mask2 = mask2_i.as_ref();

	// Set the wallet proxy listener running
	thread::spawn(move || {
		if let Err(e) = wallet_proxy.run() {
			error!("Wallet Proxy error: {}", e);
		}
	});

	// few values to keep things shorter
	let reward = core::consensus::REWARD;
	let cm = global::coinbase_maturity(); // assume all testing precedes soft fork height
									   // mine a few blocks
	let _ = test_framework::award_blocks_to_wallet(&chain, wallet1.clone(), mask1, 5, false);

	let amount = 30_000_000_000;
	let args = InitTxArgs {
		src_acct_name: None,
		amount,
		minimum_confirmations: 2,
		max_outputs: 500,
		num_change_outputs: 1,
		selection_strategy_is_use_all: true,
		..Default::default()
	};

	let slate_i = api1.init_send_tx(mask1, args)?;
	let mut slate = client1.send_tx_slate_direct("wallet2", &slate_i)?;
	api1.tx_lock_outputs(mask1, &slate)?;
	slate = api1.finalize_tx(mask1, &slate)?;

	// Check transaction log for wallet 1
	{
		let (refreshed, wallet1_info) = api1.retrieve_summary_info(mask1, true, 1)?;
		println!(
			"last confirmed height: {}",
			wallet1_info.last_confirmed_height
		);
		assert!(refreshed);
		let (_, txs) = api1.retrieve_txs(mask1, true, None, None, None)?;
		// we should have a transaction entry for this slate
		let tx = txs.iter().find(|t| t.tx_slate_id == Some(slate.id));
		assert!(tx.is_some());
		let mut locked_count = 0;
		let mut unconfirmed_count = 0;
		// get the tx entry, check outputs are as expected
		let (_, output_mappings) =
			api1.retrieve_outputs(mask1, true, false, Some(tx.unwrap().id))?;
		for m in output_mappings.clone() {
			if m.output.status == OutputStatus::Locked {
				locked_count += 1;
			}
			if m.output.status == OutputStatus::Unconfirmed {
				unconfirmed_count += 1;
			}
		}
		assert_eq!(output_mappings.len(), 3);
		assert_eq!(locked_count, 2);
		assert_eq!(unconfirmed_count, 1);
	}

	// Check transaction log for wallet 2
	{
		let (refreshed, txs) = api2.retrieve_txs(mask2, true, None, None, None)?;
		assert!(refreshed);
		let mut unconfirmed_count = 0;
		let tx = txs.iter().find(|t| t.tx_slate_id == Some(slate.id));
		assert!(tx.is_some());
		// get the tx entry, check outputs are as expected
		let (_, outputs) = api2.retrieve_outputs(mask2, true, false, Some(tx.unwrap().id))?;
		for m in outputs.clone() {
			if m.output.status == OutputStatus::Unconfirmed {
				unconfirmed_count += 1;
			}
		}
		assert_eq!(outputs.len(), 1);
		assert_eq!(unconfirmed_count, 1);
		let (refreshed, wallet2_info) = api2.retrieve_summary_info(mask2, true, 1)?;
		assert!(refreshed);
		assert_eq!(wallet2_info.amount_currently_spendable, 0,);
		assert_eq!(wallet2_info.amount_awaiting_finalization, amount);
	}

	// wallet 1 is bold and doesn't ever post the transaction
	// mine a few more blocks
	let _ = test_framework::award_blocks_to_wallet(&chain, wallet1.clone(), mask1, 5, false);

	// Wallet 1 decides to roll back instead
	{
		// can't roll back coinbase
		let res = api1.cancel_tx(mask1, Some(1), None);
		assert!(res.is_err());
		let (_, txs) = api1.retrieve_txs(mask1, true, None, None, None)?;
		let tx = txs
			.iter()
			.find(|t| t.tx_slate_id == Some(slate.id))
			.unwrap();
		api1.cancel_tx(mask1, Some(tx.id), None)?;
		let (refreshed, wallet1_info) = api1.retrieve_summary_info(mask1, true, 1)?;
		assert!(refreshed);
		println!(
			"last confirmed height: {}",
			wallet1_info.last_confirmed_height
		);
		// check all eligible inputs should be now be spendable
		println!("cm: {}", cm);
		assert_eq!(
			wallet1_info.amount_currently_spendable,
			(wallet1_info.last_confirmed_height - cm) * reward
		);
		// can't roll back again
		let res = api1.cancel_tx(mask1, Some(tx.id), None);
		assert!(res.is_err());
	}
	// Wallet 2 rolls back
	{
		let (_, txs) = api2.retrieve_txs(mask2, true, None, None, None)?;
		let tx = txs
			.iter()
			.find(|t| t.tx_slate_id == Some(slate.id))
			.unwrap();
		api2.cancel_tx(mask2, Some(tx.id), None)?;
		let (refreshed, wallet2_info) = api2.retrieve_summary_info(mask2, true, 1)?;
		assert!(refreshed);
		// check all eligible inputs should be now be spendable
		assert_eq!(wallet2_info.amount_currently_spendable, 0,);
		assert_eq!(wallet2_info.total, 0,);
		// can't roll back again
		let res = api2.cancel_tx(mask2, Some(tx.id), None);
		assert!(res.is_err());
	}

	// let logging finish
	stopper.store(false, Ordering::Relaxed);
	thread::sleep(Duration::from_millis(200));
	Ok(())
}

fn big_amount_error(test_dir: &'static str) -> Result<(), libwallet::Error> {
	// Create a new proxy to simulate server and wallet responses
	let mut wallet_proxy = create_wallet_proxy(test_dir);
	let chain = wallet_proxy.chain.clone();
	let stopper = wallet_proxy.running.clone();

	create_wallet_and_add!(
		client1,
		wallet1,
		mask1_i,
		test_dir,
		"wallet1",
		None,
		&mut wallet_proxy,
		true,
		api1
	);
	let mask1 = mask1_i.as_ref();
	println!("Mask1: {:?}", mask1);

	// Set the wallet proxy listener running
	thread::spawn(move || {
		if let Err(e) = wallet_proxy.run() {
			error!("Wallet Proxy error: {}", e);
		}
	});

	let outputs_num = 255;

	let reward = core::consensus::REWARD;
	let cm = global::coinbase_maturity();
	// mine a few blocks
	let _ =
		test_framework::award_blocks_to_wallet(&chain, wallet1.clone(), mask1, outputs_num, false);

	let min_confirmations = 1;

	// Check wallet 1 content are as expected
	{
		let (wallet1_refreshed, wallet1_info) =
			api1.retrieve_summary_info(mask1, true, min_confirmations)?;
		println!(
			"Wallet 1 Info Pre-Transaction, after {} blocks: {:?}",
			wallet1_info.last_confirmed_height, wallet1_info
		);
		assert!(wallet1_refreshed);
		assert_eq!(
			wallet1_info.amount_currently_spendable,
			(wallet1_info.last_confirmed_height - cm) * reward
		);
		assert_eq!(wallet1_info.amount_immature, cm * reward);
	}

	// test selecting max amount
	let result = api1.init_send_tx(
		mask1,
		InitTxArgs {
			amount: (reward * outputs_num as u64) - (cm * reward),
			amount_includes_fee: Some(true),
			minimum_confirmations: 0,
			max_outputs: 500,
			num_change_outputs: 1,
			selection_strategy_is_use_all: true,
			refresh_outputs_from_node: true,
			..InitTxArgs::default()
		},
	);
	println!("{:?}", result);

	let max_tx_weight = global::max_tx_weight();
	let tx_weight = Transaction::weight_by_iok(outputs_num as u64, 1, 1);

	assert!(tx_weight > max_tx_weight);

	assert!(result.is_err());
	assert!(matches!(
		result.as_ref().err().unwrap(),
		libwallet::Error::BigAmountError { .. }
	));

	match result {
		Ok(_) => {}
		Err(e) => {
			if let libwallet::Error::BigAmountError(a, fee, num_inputs) = e {
				let (_, e_a, e_fee, e_num_inputs) =
					api1.estimate_max_sendable(mask1, true, min_confirmations)?;
				assert_eq!(e_a, a - fee);
				assert_eq!(e_fee, fee);
				assert_eq!(e_num_inputs, num_inputs);
			}
		}
	}

	// let logging finish
	stopper.store(false, Ordering::Relaxed);
	thread::sleep(Duration::from_millis(200));
	Ok(())
}

#[test]
fn db_wallet_basic_transaction_api() {
	let test_dir = "test_output/basic_transaction_api";
	setup(test_dir);
	if let Err(e) = basic_transaction_api(test_dir) {
		panic!("Libwallet Error: {}", e);
	}
	clean_output_dir(test_dir);
}

#[test]
fn db_wallet_tx_rollback() {
	let test_dir = "test_output/tx_rollback";
	setup(test_dir);
	if let Err(e) = tx_rollback(test_dir) {
		panic!("Libwallet Error: {}", e);
	}
	clean_output_dir(test_dir);
}

#[test]
fn db_wallet_big_amount_error() {
	let test_dir = "test_output/big_amount_error";
	setup(test_dir);
	if let Err(e) = big_amount_error(test_dir) {
		panic!("Libwallet Error: {}", e);
	}
	clean_output_dir(test_dir);
}