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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,159 @@ | ||
| #!/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 negative interest.""" | ||
|
|
||
| from test_framework.test_framework import DefiTestFramework | ||
|
|
||
| from test_framework.util import assert_equal | ||
| import time | ||
|
|
||
| class NegativeInterestTest (DefiTestFramework): | ||
| def set_test_params(self): | ||
| self.num_nodes = 1 | ||
| self.setup_clean_chain = True | ||
| self.extra_args = [ | ||
| ['-txnotokens=0', '-amkheight=1', '-bayfrontheight=1', '-eunosheight=1', '-fortcanningheight=1', '-fortcanninghillheight=1', '-fortcanningcrunchheight=1', '-greatworldheight=1', '-jellyfish_regtest=1']] | ||
|
|
||
| def run_test(self): | ||
| # Create tokens for tests | ||
| self.setup_test_tokens() | ||
|
|
||
| # Setup pools | ||
| self.setup_test_pools() | ||
|
|
||
| # Setup Oracles | ||
| self.setup_test_oracles() | ||
|
|
||
| # Test negative interest | ||
| self.test_negative_interest() | ||
|
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||
| def setup_test_tokens(self): | ||
| # Generate chain | ||
| self.nodes[0].generate(120) | ||
|
|
||
| # Get MN address | ||
| self.address = self.nodes[0].get_genesis_keys().ownerAuthAddress | ||
|
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||
| # Token symbols | ||
| self.symbolDFI = "DFI" | ||
| self.symbolDUSD = "DUSD" | ||
|
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||
| # Create loan token | ||
| self.nodes[0].setloantoken({ | ||
| 'symbol': self.symbolDUSD, | ||
| 'name': self.symbolDUSD, | ||
| 'fixedIntervalPriceId': f"{self.symbolDUSD}/USD", | ||
| 'mintable': True, | ||
| 'interest': 0 | ||
| }) | ||
| self.nodes[0].generate(1) | ||
|
|
||
| # Store DUSD ID | ||
| self.idDUSD = list(self.nodes[0].gettoken(self.symbolDUSD).keys())[0] | ||
|
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||
| # Mint DUSD | ||
| self.nodes[0].minttokens("100000@DUSD") | ||
| self.nodes[0].generate(1) | ||
|
|
||
| # Create DFI tokens | ||
| self.nodes[0].utxostoaccount({self.address: "100000@" + self.symbolDFI}) | ||
| self.nodes[0].generate(1) | ||
|
|
||
| def setup_test_pools(self): | ||
|
|
||
| # Create pool pair | ||
| self.nodes[0].createpoolpair({ | ||
| "tokenA": self.symbolDFI, | ||
| "tokenB": self.symbolDUSD, | ||
| "commission": 0, | ||
| "status": True, | ||
| "ownerAddress": self.address | ||
| }) | ||
| self.nodes[0].generate(1) | ||
|
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||
| # Add pool liquidity | ||
| self.nodes[0].addpoolliquidity({ | ||
| self.address: [ | ||
| '10000@' + self.symbolDFI, | ||
| '10000@' + self.symbolDUSD] | ||
| }, self.address) | ||
| self.nodes[0].generate(1) | ||
|
|
||
| def setup_test_oracles(self): | ||
|
|
||
| # Create Oracle address | ||
| oracle_address = self.nodes[0].getnewaddress("", "legacy") | ||
|
|
||
| # Define price feeds | ||
| price_feed = [ | ||
| {"currency": "USD", "token": "DFI"}, | ||
| {"currency": "USD", "token": "BTC"} | ||
| ] | ||
|
|
||
| # Appoint Oracle | ||
| oracle = self.nodes[0].appointoracle(oracle_address, price_feed, 10) | ||
| self.nodes[0].generate(1) | ||
|
|
||
| # Set Oracle prices | ||
| oracle_prices = [ | ||
| {"currency": "USD", "tokenAmount": f"1@{self.symbolDFI}"}, | ||
| ] | ||
| self.nodes[0].setoracledata(oracle, int(time.time()), oracle_prices) | ||
| self.nodes[0].generate(10) | ||
|
|
||
| # Set collateral tokens | ||
| self.nodes[0].setcollateraltoken({ | ||
| 'token': self.symbolDFI, | ||
| 'factor': 1, | ||
| 'fixedIntervalPriceId': "DFI/USD" | ||
| }) | ||
| self.nodes[0].generate(1) | ||
|
|
||
| # Create loan scheme | ||
| self.nodes[0].createloanscheme(150, 5, 'LOAN001') | ||
| self.nodes[0].generate(1) | ||
|
|
||
| def test_negative_interest(self): | ||
|
|
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| # Create vault | ||
| vault_address = self.nodes[0].getnewaddress('', 'legacy') | ||
| vault_id = self.nodes[0].createvault(vault_address, 'LOAN001') | ||
| self.nodes[0].generate(1) | ||
|
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||
| # Fund vault address | ||
| self.nodes[0].accounttoaccount(self.address, {vault_address: f"1000@{self.symbolDFI}"}) | ||
| self.nodes[0].generate(1) | ||
|
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||
| # Deposit DUSD and DFI to vault | ||
| self.nodes[0].deposittovault(vault_id, vault_address, f"10@{self.symbolDFI}") | ||
| self.nodes[0].generate(1) | ||
|
|
||
| # Set negative interest rate to cancel out scheme interest | ||
| self.nodes[0].setgov({"ATTRIBUTES":{f'v0/token/{self.idDUSD}/loan_minting_interest':'-5'}}) | ||
| self.nodes[0].generate(1) | ||
|
|
||
| # Take DUSD loan | ||
| self.nodes[0].takeloan({ "vaultId": vault_id, "amounts": f"1@{self.symbolDUSD}"}) | ||
| self.nodes[0].generate(1) | ||
|
|
||
| # Check loan interest | ||
| vault = self.nodes[0].getvault(vault_id) | ||
| assert_equal(vault['interestAmounts'], [f'0.00000000@{self.symbolDUSD}']) | ||
|
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||
| # Set negative interest rate to go below 0 when combined with scheme interest | ||
| self.nodes[0].setgov({"ATTRIBUTES":{f'v0/token/{self.idDUSD}/loan_minting_interest':'-10'}}) | ||
| self.nodes[0].generate(1) | ||
|
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| # Take DUSD loan | ||
| self.nodes[0].takeloan({ "vaultId": vault_id, "amounts": f"1@{self.symbolDUSD}"}) | ||
| self.nodes[0].generate(1) | ||
|
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| # Check loan interest | ||
| vault = self.nodes[0].getvault(vault_id) | ||
| assert_equal(vault['interestAmounts'], [f'0.00000000@{self.symbolDUSD}']) | ||
|
|
||
| if __name__ == '__main__': | ||
| NegativeInterestTest().main() |
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