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Test getinterest calculation (#1092)
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* Add getinterest output test

* Adds FCM height and adjust calculations

* Add calculation post FCM and post FCH

* Test takeloan of 1sat in loop

* Update test description
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@Jouzo
Jouzo authored Jan 31, 2022
1 parent cf8e454 commit 31e160a
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189 changes: 189 additions & 0 deletions test/functional/feature_loan_get_interest.py
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#!/usr/bin/env python3
# Copyright (c) 2014-2019 The Bitcoin Core developers
# Copyright (c) DeFi Blockchain Developers
# Distributed under the MIT software license, see the accompanying
# file LICENSE or http://www.opensource.org/licenses/mit-license.php.
"""Test Loan - get interest calculation."""

from test_framework.test_framework import DefiTestFramework
from test_framework.util import assert_equal

import calendar
import time
from decimal import Decimal

class LoanGetInterestTest (DefiTestFramework):
symbolDFI = "DFI"
symbolBTC = "BTC"
symboldUSD = "DUSD"

def set_test_params(self):
self.num_nodes = 1
self.setup_clean_chain = True
self.extra_args = [
['-txnotokens=0', '-amkheight=50', '-bayfrontheight=50', '-bayfrontgardensheight=1',
'-fortcanningheight=50', '-fortcanningmuseumheight=200', '-fortcanningparkheight=270', '-fortcanninghillheight=300', '-eunosheight=50', '-txindex=1']
]

def setup(self):
self.nodes[0].generate(150)

self.account0 = self.nodes[0].get_genesis_keys().ownerAuthAddress

self.nodes[0].createtoken({
"symbol": self.symbolBTC,
"name": "BTC token",
"isDAT": True,
"collateralAddress": self.account0
})

self.nodes[0].generate(1)

idDFI = list(self.nodes[0].gettoken(self.symbolDFI).keys())[0]
idBTC = list(self.nodes[0].gettoken(self.symbolBTC).keys())[0]

self.nodes[0].utxostoaccount({self.account0: "1000@" + self.symbolDFI})

oracle_address1 = self.nodes[0].getnewaddress("", "legacy")
price_feeds1 = [
{"currency": "USD", "token": "DFI"},
{"currency": "USD", "token": "BTC"},
]
oracle_id1 = self.nodes[0].appointoracle(
oracle_address1, price_feeds1, 10)
self.nodes[0].generate(1)

# feed oracle
oracle1_prices = [
{"currency": "USD", "tokenAmount": "100000@DFI"},
{"currency": "USD", "tokenAmount": "10@BTC"}
]
timestamp = calendar.timegm(time.gmtime())
self.nodes[0].setoracledata(oracle_id1, timestamp, oracle1_prices)
self.nodes[0].generate(1)

self.nodes[0].setcollateraltoken({
'token': idDFI,
'factor': 1,
'fixedIntervalPriceId': "DFI/USD"
})

self.nodes[0].setcollateraltoken({
'token': idBTC,
'factor': 1,
'fixedIntervalPriceId': "BTC/USD"})

self.nodes[0].generate(1)

self.nodes[0].setloantoken({
'symbol': self.symboldUSD,
'name': "DUSD stable token",
'fixedIntervalPriceId': "DUSD/USD",
'mintable': True,
'interest': 1
})
self.nodes[0].generate(1)

self.nodes[0].createloanscheme(150, 100, 'LOAN150')

self.nodes[0].generate(5)

iddUSD = list(self.nodes[0].gettoken(self.symboldUSD).keys())[0]

self.nodes[0].minttokens("300@" + self.symboldUSD)
self.nodes[0].generate(1)

poolOwner = self.nodes[0].getnewaddress("", "legacy")
# create pool DUSD-DFI
self.nodes[0].createpoolpair({
"tokenA": iddUSD,
"tokenB": idDFI,
"commission": Decimal('0.000'),
"status": True,
"ownerAddress": poolOwner,
"pairSymbol": "DUSD-DFI",
})
self.nodes[0].generate(1)

self.nodes[0].addpoolliquidity(
{self.account0: ["30@" + self.symbolDFI, "300@" + self.symboldUSD]}, self.account0)
self.nodes[0].generate(1)

def run_test(self):
self.setup()

vaultId = self.nodes[0].createvault(self.account0, 'LOAN150')
self.nodes[0].generate(1)

self.nodes[0].deposittovault(vaultId, self.account0, "400@DFI")
self.nodes[0].generate(1)

self.nodes[0].takeloan({
'vaultId': vaultId,
'amounts': "2000@" + self.symboldUSD
})
self.nodes[0].generate(1)

self.nodes[0].generate(25) # Accrue interest

getInterest = self.nodes[0].getinterest("LOAN150", "DUSD")
assert_equal(getInterest[0]['totalInterest'], Decimal('0.99923876'))
assert_equal(getInterest[0]['interestPerBlock'], Decimal('0.03843226'))

self.nodes[0].deposittovault(vaultId, self.account0, "100@DFI")
self.nodes[0].generate(1)

self.nodes[0].takeloan({
'vaultId': vaultId,
'amounts': "500@" + self.symboldUSD
})
self.nodes[0].generate(1)

getInterest = self.nodes[0].getinterest("LOAN150", "DUSD")
assert_equal(getInterest[0]['totalInterest'], Decimal('1.08571134'))
assert_equal(getInterest[0]['interestPerBlock'], Decimal('0.04804032'))

self.nodes[0].generate(10) # Activate FCM

self.nodes[0].takeloan({
'vaultId': vaultId,
'amounts': "500.2@" + self.symboldUSD
})
self.nodes[0].generate(1)

getInterest = self.nodes[0].getinterest("LOAN150", "DUSD")
assert_equal(getInterest[0]['totalInterest'], Decimal('1.62376677'))
assert_equal(getInterest[0]['interestPerBlock'], Decimal('0.05765223'))

self.nodes[0].takeloan({
'vaultId': vaultId,
'amounts': "0.00000001@" + self.symboldUSD
})
self.nodes[0].generate(1)

getInterest = self.nodes[0].getinterest("LOAN150", "DUSD")
print("getInterest", getInterest)
assert_equal(getInterest[0]['totalInterest'], Decimal('1.68141901'))
assert_equal(getInterest[0]['interestPerBlock'], Decimal('0.05765224'))

self.nodes[0].takeloan({
'vaultId': vaultId,
'amounts': "50000.00000001@" + self.symboldUSD
})
self.nodes[0].generate(1)

getInterest = self.nodes[0].getinterest("LOAN150", "DUSD")
assert_equal(getInterest[0]['totalInterest'], Decimal('2.69987797'))
assert_equal(getInterest[0]['interestPerBlock'], Decimal('1.01845896'))

for i in range(1, 50):
self.nodes[0].takeloan({
'vaultId': vaultId,
'amounts': "0.00000001@" + self.symboldUSD
})
self.nodes[0].generate(1)
newInterest = self.nodes[0].getinterest("LOAN150", "DUSD")
assert_equal(newInterest[0]['totalInterest'], Decimal('2.69987797') + newInterest[0]['interestPerBlock'] * i)

if __name__ == '__main__':
LoanGetInterestTest().main()
6 changes: 3 additions & 3 deletions test/functional/feature_loan_payback_dfi.py
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# Copyright (c) DeFi Blockchain Developers
# Distributed under the MIT software license, see the accompanying
# file LICENSE or http://www.opensource.org/licenses/mit-license.php.
"""Test Loan - payback loan."""
"""Test Loan - payback loan dfi."""

from test_framework.test_framework import DefiTestFramework
from test_framework.util import assert_equal, assert_raises_rpc_error
Expand All @@ -13,7 +13,7 @@
from decimal import Decimal, ROUND_UP


class PaybackLoanTest (DefiTestFramework):
class PaybackDFILoanTest (DefiTestFramework):
def set_test_params(self):
self.num_nodes = 1
self.setup_clean_chain = True
Expand Down Expand Up @@ -287,4 +287,4 @@ def run_test(self):


if __name__ == '__main__':
PaybackLoanTest().main()
PaybackDFILoanTest().main()
1 change: 1 addition & 0 deletions test/functional/test_runner.py
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'feature_loan_setloantoken.py',
'feature_loan_basics.py',
'feature_loan_payback_dfi.py',
'feature_loan_get_interest.py',
'feature_loan_listauctions.py',
'feature_loan_auctions.py',
'feature_loan_dusd_as_collateral.py',
Expand Down

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