Merge branch 'certora/integrationStep2' into 'master'

Integrating Certora FV into the CI: Step 2

Closes #106

See merge request aave-tech/protocol-v2!182

.gitlab-ci.yml

@@ -24,3 +24,20 @@ deploy-mainnet-fork:
   after_script:
     - docker-compose -p ${CI_JOB_ID} -f docker-compose.test.yml run contracts-env npm run ci:clean
     - docker-compose -p ${CI_JOB_ID} -f docker-compose.test.yml down
+
+certora-test:
+  stage: checks
+  image: python:latest
+  before_script:
+    - apt-get update || apt-get update
+    - apt-get install -y software-properties-common
+    - pip3 install certora-cli-beta==0.4.1
+    - wget https://github.com/ethereum/solidity/releases/download/v0.6.12/solc-static-linux
+    - chmod +x solc-static-linux
+    - mv solc-static-linux /usr/bin/solc
+    - export PATH=$PATH:/usr/bin/solc/solc-static-linux
+  script:
+    - certoraRun specs/harness/StableDebtTokenHarness.sol:StableDebtTokenHarness --verify StableDebtTokenHarness:specs/StableDebtToken.spec --settings -assumeUnwindCond,-b=4 --cache StableDebtToken --staging
+    - certoraRun specs/harness/UserConfigurationHarness.sol --verify UserConfigurationHarness:specs/UserConfiguration.spec --solc_args '--optimize' --settings -useBitVectorTheory --staging
+    - certoraRun contracts/protocol/tokenization/VariableDebtToken.sol:VariableDebtToken specs/harness/LendingPoolHarnessForVariableDebtToken.sol --solc_args '--optimize' --link VariableDebtToken:POOL=LendingPoolHarnessForVariableDebtToken --verify VariableDebtToken:specs/VariableDebtToken.spec --settings -assumeUnwindCond,-useNonLinearArithmetic,-b=4 --cache VariableDebtToken --staging
+

runStableTokenCLI.sh

@@ -1 +1 @@
-certoraRun specs/harness/StableDebtTokenHarness.sol:StableDebtTokenHarness --solc solc6.8 --verify StableDebtTokenHarness:specs/StableDebtToken.spec --settings -assumeUnwindCond --cache StableDebtToken --staging master
+certoraRun specs/harness/StableDebtTokenHarness.sol:StableDebtTokenHarness --solc solc6.12 --verify StableDebtTokenHarness:specs/StableDebtToken.spec --settings -assumeUnwindCond,-b=4 --staging

runUserConfigCLI.sh

@@ -1 +1 @@
-certoraRun specs/harness/UserConfigurationHarness.sol  --solc solc6.8 --verify UserConfigurationHarness:specs/UserConfiguration.spec --settings -useBitVectorTheory --staging master
+certoraRun specs/harness/UserConfigurationHarness.sol  --solc solc6.12 --verify UserConfigurationHarness:specs/UserConfiguration.spec --solc_args '--optimize' --settings -useBitVectorTheory --staging

runVariableTokenCLI.sh

@@ -1 +1 @@
-certoraRun contracts/tokenization/VariableDebtToken.sol:VariableDebtToken specs/harness/LendingPoolHarnessForVariableDebtToken.sol --solc solc6.8 --link VariableDebtToken:POOL=LendingPoolHarnessForVariableDebtToken --verify VariableDebtToken:specs/VariableDebtToken.spec --settings -assumeUnwindCond,-useNonLinearArithmetic --cache VariableDebtToken --staging
+certoraRun contracts/protocol/tokenization/VariableDebtToken.sol:VariableDebtToken specs/harness/LendingPoolHarnessForVariableDebtToken.sol --solc solc6.12 --solc_args '--optimize' --link VariableDebtToken:POOL=LendingPoolHarnessForVariableDebtToken --verify VariableDebtToken:specs/VariableDebtToken.spec --settings -b=4,-assumeUnwindCond,-useNonLinearArithmetic --staging

specs/StableDebtToken.spec

@@ -14,82 +14,110 @@ rule integrityTimeStamp(address user, method f) {
 /**
 TotalSupply is the sum of all users’ balances
 	
-totalSupply(t) = Σaddress u. balanceOf(u,t)
+totalSupply(t) = Σaddress u. balanceOf(u,t).
 
-Check that each possible opertaion changes the balance of at most one user
+Checks that each possible operation changes the balance of at most one user.
 */
-rule balanceOfChange(address a, address b, method f )
+rule balanceOfChange(address a, address b, method f)
 {
 	env e;
 	require a!=b;
 	require sinvoke getIncentivesController(e) == 0;
-	uint256 balanceABefore = sinvoke balanceOf(e,a);
-	uint256 balanceBBefore = sinvoke balanceOf(e,b);
+	uint256 balanceABefore = sinvoke balanceOf(e, a);
+	uint256 balanceBBefore = sinvoke balanceOf(e, b);
 	 
 	calldataarg arg;
 	sinvoke f(e, arg); 
 
-	uint256 balanceAAfter = sinvoke balanceOf(e,a);
-	uint256 balanceBAfter = sinvoke balanceOf(e,b);
+	uint256 balanceAAfter = sinvoke balanceOf(e, a);
+	uint256 balanceBAfter = sinvoke balanceOf(e, b);
 	
-	assert ( balanceABefore == balanceAAfter || balanceBBefore == balanceBAfter );
+	assert (balanceABefore == balanceAAfter || balanceBBefore == balanceBAfter );
 }
 
 /**
-Check that the change to total supply is coherent with the changes to balance
+Checks that the change to total supply is coherent with the change to user balance due to an operation
+(which is not burn).
 */
 rule integirtyBalanceOfTotalSupply(address a, method f )
 {
 	env e;
 	require sinvoke getIncentivesController(e) == 0;
-	uint256 balanceABefore = sinvoke balanceOf(e,a);
+	uint256 balanceABefore = sinvoke balanceOf(e, a);
 	uint256 totalSupplyBefore = sinvoke totalSupply(e);
 	 
 	calldataarg arg;
 	sinvoke f(e, arg); 
-	require (f.selector != burn(address,uint256).selector );
-	uint256 balanceAAfter = sinvoke balanceOf(e,a);
+	require (f.selector != burn(address, uint256).selector);
+	uint256 balanceAAfter = sinvoke balanceOf(e, a);
 	uint256 totalSupplyAfter = sinvoke totalSupply(e);
 
-	assert  (balanceAAfter != balanceABefore  => ( balanceAAfter - balanceABefore  == totalSupplyAfter - totalSupplyBefore));
+	assert  (balanceAAfter != balanceABefore  => (balanceAAfter - balanceABefore  == totalSupplyAfter - totalSupplyBefore));
 }
 
-/* Burn behaves differently and due to accumulation errors might have less total supply than the balance
+
+/**
+Checks that the change to total supply is coherent with the change to user balance due to a burn operation.
 */
-rule integirtyBalanceOfTotalSupplyOnBurn(address a, method f)
+rule integirtyBalanceOfTotalSupplyOnBurn(address a, uint256 x)
 {
 	env e;
 	require sinvoke getIncentivesController(e) == 0;
-	uint256 balanceABefore = sinvoke balanceOf(e,a);
+	
+	uint256 balanceABefore = sinvoke balanceOf(e, a);
+	
 	uint256 totalSupplyBefore = sinvoke totalSupply(e);
-	 
-	uint256 x;
+	uint256 averageStableRateBefore = sinvoke getAverageStableRate(e);
+	uint256 debtSupplyBefore = sinvoke rayWadMul(e, averageStableRateBefore, totalSupplyBefore);
+	
+	uint256 stableRateA = sinvoke getUserStableRate(e, a);
+	uint256 repaidDebtA = sinvoke rayWadMul(e, stableRateA, x);
+	
+	
 	sinvoke burn(e, a, x); 
-	uint256 balanceAAfter = sinvoke balanceOf(e,a);
+	uint256 balanceAAfter = sinvoke balanceOf(e, a);
 	uint256 totalSupplyAfter = sinvoke totalSupply(e);
-	if (totalSupplyBefore > x)
-		assert  (balanceAAfter != balanceABefore  => ( balanceAAfter - balanceABefore  == totalSupplyAfter - totalSupplyBefore));
-	else
-		assert  (totalSupplyAfter == 0 );
+
+	if(totalSupplyBefore > x) {
+	    /* The amount being burned (x) is smaller than the total supply */
+		if(repaidDebtA >= debtSupplyBefore) {
+			/*
+			The user debt being repaid is at least the debt supply.
+			The total supply becomes 0.
+			*/
+			assert(totalSupplyAfter == 0);
+		}
+		else {
+			assert(balanceAAfter != balanceABefore  =>
+			(balanceAAfter - balanceABefore  == totalSupplyAfter - totalSupplyBefore));
+		}
+	}
+	else {
+	/* The amount being burned (x) is at least the total supply.
+	   The total supply becomes 0.
+	*/
+		assert (totalSupplyAfter == 0);
+	}
 }
 
 /**
-Mint inceases the balanceOf user a as expected
+Mint increases the balanceOf user a as expected.
 */
 rule integrityMint(address a, uint256 x) {
 	env e;
+	address delegatedUser;
 	require sinvoke getIncentivesController(e) == 0;
 	uint256 index;
 	uint256 balancebefore = sinvoke balanceOf(e,a);
-	sinvoke mint(e,a,x,index);
+	sinvoke mint(e, delegatedUser, a, x, index);
 	
 	uint256 balanceAfter = sinvoke balanceOf(e,a);
 	assert balanceAfter == balancebefore+x;
 }
 
 /**
-Mint is additive, can performed either all at once or gradually
-mint(u,x); mint(u,y) ~ mint(u,x+y) at the same timestamp
+Mint is additive, namely it can performed either all at once or gradually:
+mint(u, x); mint(u, y) ~ mint(u, x+y) at the same timestamp.
 
 Note: We assume that the stable rate of the user is 0.
 The case where the rate is non-zero takes much more time to prove,
@@ -97,18 +125,19 @@ and therefore it is currently excluded from the CI.
 */
 rule additiveMint(address a, uint256 x, uint256 y) {
 	env e;
+	address delegatedUser;
 	require sinvoke getIncentivesController(e) == 0;
-	require getUserStableRate(e,a) == 0;
+	require getUserStableRate(e, a) == 0;
 	uint256 index;
 	storage initialStorage = lastStorage;
-	sinvoke mint(e,a,x,index);
-	sinvoke mint(e,a,y,index);
-	uint256 balanceScenario1 = sinvoke balanceOf(e,a);
+	sinvoke mint(e, delegatedUser, a, x, index);
+	sinvoke mint(e, delegatedUser, a, y, index);
+	uint256 balanceScenario1 = sinvoke balanceOf(e, a);
 	
 	uint256 t = x + y;
-	sinvoke mint(e,a, t ,index) at initialStorage;
+	sinvoke mint(e, delegatedUser, a, t ,index) at initialStorage;
 	
-	uint256 balanceScenario2 = sinvoke balanceOf(e,a);
+	uint256 balanceScenario2 = sinvoke balanceOf(e, a);
 	assert balanceScenario1 == balanceScenario2, "mint is not additive";
 }
 
@@ -116,10 +145,10 @@ rule integrityBurn(address a, uint256 x) {
 	env e;
 	require sinvoke getIncentivesController(e) == 0;
 	uint256 index;
-	uint256 balancebefore = sinvoke balanceOf(e,a);
+	uint256 balancebefore = sinvoke balanceOf(e, a);
 	sinvoke burn(e,a,x);
 	
-	uint256 balanceAfter = sinvoke balanceOf(e,a);
+	uint256 balanceAfter = sinvoke balanceOf(e, a);
 	assert balanceAfter == balancebefore - x;
 }
 
@@ -139,17 +168,17 @@ rule additiveBurn(address a, uint256 x,  uint256 y) {
 
 
 /**
-mint and burn are inverse operations
-Thus, totalSupply is back to initial state
-BalanceOf user is back to initial state */
+Mint and burn are inverse operations.
+Therefore, both totalSupply and BalanceOf user are back to the initial state.
+*/
 rule inverseMintBurn(address a, uint256 x) {
 	env e;
+	address delegatedUser;
 	require sinvoke getIncentivesController(e) == 0;
 	uint256 index;
-	uint256 balancebefore = sinvoke balanceOf(e,a);
-	sinvoke mint(e,a,x,index);
-	sinvoke burn(e,a,x);
-	uint256 balanceAfter = sinvoke balanceOf(e,a);
-	assert balancebefore == balanceAfter, "burn is not inverse of mint";
-}
-
+	uint256 balancebefore = sinvoke balanceOf(e, a);
+	sinvoke mint(e, delegatedUser, a, x, index);
+	sinvoke burn(e, a, x);
+	uint256 balanceAfter = sinvoke balanceOf(e, a);
+	assert balancebefore == balanceAfter, "burn is not the inverse of mint";
+}

specs/VariableDebtToken.spec

@@ -1,15 +1,12 @@
 using LendingPoolHarnessForVariableDebtToken as POOL
-/**
-TotalSupply is the sum of all users’ balances
-	
-totalSupply(t) = Σaddress u. balanceOf(u,t)
 
-Check that each possible opertaion changes the balance of at most one user
+/**
+Checks that each possible opertaion changes the balance of at most one user.
 */
 rule balanceOfChange(address a, address b, method f)
 {
 	env e;
-	require a!=b ;
+	require a != b;
 	uint256 balanceABefore = sinvoke balanceOf(e, a);
 	uint256 balanceBBefore = sinvoke balanceOf(e, b);
 	 
@@ -19,14 +16,14 @@ rule balanceOfChange(address a, address b, method f)
 	uint256 balanceAAfter = sinvoke balanceOf(e, a);
 	uint256 balanceBAfter = sinvoke balanceOf(e, b);
 	
-	assert ( balanceABefore == balanceAAfter || balanceBBefore == balanceBAfter );
+	assert (balanceABefore == balanceAAfter || balanceBBefore == balanceBAfter);
 }
 
-/*
-Check that the changed to total supply is coherent with the changes to balance
+/**
+Checks that the change to total supply is coherent with the change to the balance due to an operation
+(which is neither a burn nor a mint).
 */
-
-rule integirtyBalanceOfTotalSupply(address a, method f )
+rule integirtyBalanceOfTotalSupply(address a, method f)
 {
 	env e;
 	
@@ -36,17 +33,17 @@ rule integirtyBalanceOfTotalSupply(address a, method f )
 	calldataarg arg;
 	sinvoke f(e, arg); 
 	require (f.selector != burn(address, uint256, uint256).selector  &&
-		f.selector != mint(address, uint256, uint256).selector ) ;
+		f.selector != mint(address, address, uint256, uint256).selector);
 	uint256 balanceAAfter = balanceOf(e, a);
 	uint256 totalSupplyAfter = totalSupply(e);
 
 	assert  (balanceAAfter != balanceABefore  => ( balanceAAfter - balanceABefore  == totalSupplyAfter - totalSupplyBefore));
 }
 
-/* Burn behaves deferently and due to accumulation errors might hace less total supply then the balance
+/**
+Checks that the change to total supply is coherent with the change to the balance due to a burn operation.
 */
-
-rule integirtyBalanceOfTotalSupplyOnBurn(address a, method f )
+rule integirtyBalanceOfTotalSupplyOnBurn(address a)
 {
 	env e;
 	
@@ -59,67 +56,75 @@ rule integirtyBalanceOfTotalSupplyOnBurn(address a, method f )
 	sinvoke burn(e, a, x, index); 
 	uint256 balanceAAfter = balanceOf(e, a);
 	uint256 totalSupplyAfter = totalSupply(e);
-	assert  (balanceAAfter != balanceABefore  => ( balanceAAfter - balanceABefore  == totalSupplyAfter - totalSupplyBefore));
+	assert (balanceAAfter != balanceABefore  => (balanceAAfter - balanceABefore  == totalSupplyAfter - totalSupplyBefore));
 }
 
-rule integirtyBalanceOfTotalSupplyOnMint(address a, method f )
+/**
+Checks that the change to total supply is coherent with the change to the balance due to a mint operation.
+*/
+rule integirtyBalanceOfTotalSupplyOnMint(address u, address delegatedUser)
 {
 	env e;
 	
-	uint256 balanceABefore = balanceOf(e, a);
+	uint256 balanceUBefore = balanceOf(e, u);
 	uint256 totalSupplyBefore = totalSupply(e);
 	 
 	uint256 x;
 	address asset;
 	uint256 index = POOL.getReserveNormalizedVariableDebt(e, asset);
-	sinvoke mint(e, a, x, index); 
-	uint256 balanceAAfter = balanceOf(e, a);
+	sinvoke mint(e, delegatedUser, u, x, index); 
+	uint256 balanceUAfter = balanceOf(e, u);
 	uint256 totalSupplyAfter = totalSupply(e);
-	assert  (balanceAAfter != balanceABefore  => ( balanceAAfter - balanceABefore  == totalSupplyAfter - totalSupplyBefore));
+	assert (balanceUAfter != balanceUBefore  => (balanceUAfter - balanceUBefore  == totalSupplyAfter - totalSupplyBefore));
 }
 
 /**
-Minting an amount of x tokens for user u increases their balance by x, up to rounding errors. 
-{ b= balanceOf(u,t) } 
-mint(u,x,index) 
-{ balanceOf(u,t) = b + x }
+Minting an amount of x tokens for user u increases her balance by x, up to rounding errors. 
+{ b = balanceOf(u,t) } 
+mint(delegatedUser, u, x, index) 
+{ balanceOf(u,t) = b + x }.
 
+Also, if the minting is done by a user delegatedUser different than u, the balance of delegatedUser
+remains unchanged.
 */
-rule integrityMint(address a, uint256 x) {
+rule integrityMint(address u, address delegatedUser, uint256 x) {
 	env e;
 	address asset;
 	uint256 index = POOL.getReserveNormalizedVariableDebt(e,asset);
-	uint256 balancebefore = balanceOf(e, a);
-	sinvoke mint(e, a, x, index);
+	uint256 balanceUBefore = balanceOf(e, u);
+	uint256 balanceDelegatedUBefore = balanceOf(e, delegatedUser);
+	sinvoke mint(e, delegatedUser, u, x, index);
 	
-	uint256 balanceAfter = balanceOf(e, a);
-	assert balanceAfter == balancebefore+x;
+	uint256 balanceUAfter = balanceOf(e, u);
+	uint256 balanceDelegatedUAfter = balanceOf(e, delegatedUser);
+	
+	assert balanceUAfter == balanceUBefore + x && (u != delegatedUser => (balanceDelegatedUAfter == balanceDelegatedUBefore));
 }
 
 /**
-Mint is additive, can performed either all at once or gradually
-mint(u,x); mint(u,y) ~ mint(u,x+y) at the same timestamp
+Mint is additive, namely it can performed either all at once or gradually:
+mint(delegatedUser, u, x, index); mint(delegatedUser, u, y, index) ~ mint(delegatedUser, u, x+y, index) at the same timestamp.
 */
-rule additiveMint(address a, uint256 x, uint256 y) {
+rule additiveMint(address a, address delegatedUser, uint256 x, uint256 y) {
 	env e;
 	address asset;
 	uint256 index = POOL.getReserveNormalizedVariableDebt(e, asset);
 	storage initialStorage = lastStorage;
-	sinvoke mint(e, a, x, index);
-	sinvoke mint(e, a, y, index);
+	sinvoke mint(e, delegatedUser, a, x, index);
+	sinvoke mint(e, delegatedUser, a, y, index);
 	uint256 balanceScenario1 = balanceOf(e, a);
-	uint t = x + y;
-	sinvoke mint(e, a, t ,index) at initialStorage;
+	uint256 t = x + y;
+	sinvoke mint(e, delegatedUser, a, t ,index) at initialStorage;
 
 	uint256 balanceScenario2 = balanceOf(e, a);
 	assert balanceScenario1 == balanceScenario2, "mint is not additive";
 }
 
 /** 
-Transfer of x amount of tokens from user u  where receiver is user u’
-{bu = balanceOf(u) } 
-	burn(u, u’, x)
-{balanceOf(u) = bu - x } 
+Burning an amount of x tokens for user u decreases her balance by x, up to rounding errors. 
+{ bu = balanceOf(u) } 
+	burn(u, x)
+{ balanceOf(u) = bu - x }.
 */
 rule integrityBurn(address a, uint256 x) {
 	env e;
@@ -132,9 +137,8 @@ rule integrityBurn(address a, uint256 x) {
 	assert balanceAfter == balancebefore - x;
 }
 /**
-Minting is additive, i.e., it can be performed either all at once or in steps.
-
-burn(u, u’, x); burn(u, u’, y) ~ burn(u, u’, x+y) 
+Minting is additive, i.e., it can be performed either all at once or in steps:
+burn(u, x); burn(u, y) ~ burn(u, x+y) at the same timestamp.
 */
 rule additiveBurn(address a, uint256 x,  uint256 y) {
 	env e;
@@ -144,7 +148,7 @@ rule additiveBurn(address a, uint256 x,  uint256 y) {
 	sinvoke burn(e, a, x, index);
 	sinvoke burn(e, a, y, index);
 	uint256 balanceScenario1 = balanceOf(e, a);
-	uint t = x + y;
+	uint256 t = x + y;
 	sinvoke burn(e, a, t ,index) at initialStorage;
 
 	uint256 balanceScenario2 = balanceOf(e, a);
@@ -152,22 +156,19 @@ rule additiveBurn(address a, uint256 x,  uint256 y) {
 }
 
 /**
-Minting and burning are inverse operations.
-
-{bu = balanceOf(u) } 
+Minting and burning are inverse operations:
+{ bu = balanceOf(u) } 
 mint(u,x); burn(u, u, x) 
-	{balanceOf(u) = bu } 
+{ balanceOf(u) = bu }.
 */
 rule inverseMintBurn(address a, uint256 x) {
 	env e;
 	address asset;
+	address delegatedUser;
 	uint256 index = POOL.getReserveNormalizedVariableDebt(e, asset);
 	uint256 balancebefore = balanceOf(e, a);
-	sinvoke mint(e, a, x, index);
+	sinvoke mint(e, delegatedUser, a, x, index);
 	sinvoke burn(e, a, x, index);
-	uint256 balanceAfter =  balanceOf(e, a);
-	assert balancebefore == balanceAfter, "burn is not inverse of mint";
-}
-
-
-
+	uint256 balanceAfter = balanceOf(e, a);
+	assert balancebefore == balanceAfter, "burn is not the inverse of mint";
+}

specs/harness/LendingPoolHarnessForVariableDebtToken.sol

@@ -2,9 +2,9 @@ pragma solidity 0.6.12;
 pragma experimental ABIEncoderV2;
 
 import {ILendingPool} from '../../contracts/interfaces/ILendingPool.sol';
-import {LendingPool} from '../../contracts/lendingpool/LendingPool.sol';
+import {LendingPool} from '../../contracts/protocol/lendingpool/LendingPool.sol';
 import {
-  ILendingPoolAddressesProvider
+ILendingPoolAddressesProvider
 } from '../../contracts/interfaces/ILendingPoolAddressesProvider.sol';
 import {DataTypes} from '../protocol/libraries/types/DataTypes.sol';
 
@@ -101,7 +101,7 @@ contract LendingPoolHarnessForVariableDebtToken is ILendingPool {
     override
     returns (
       uint256 totalCollateralETH,
-      uint256 totalBorrowsETH,
+      uint256 totalDebtETH,
       uint256 availableBorrowsETH,
       uint256 currentLiquidationThreshold,
       uint256 ltv,

specs/harness/StableDebtTokenHarness.sol

@@ -1,7 +1,7 @@
 pragma solidity 0.6.12;
 
-import {StableDebtToken} from '../../contracts/tokenization/StableDebtToken.sol';
-import {IncentivizedERC20} from '../../contracts/tokenization/IncentivizedERC20.sol';
+import {StableDebtToken} from '../../contracts/protocol/tokenization/StableDebtToken.sol';
+import {IncentivizedERC20} from '../../contracts/protocol/tokenization/IncentivizedERC20.sol';
 
 contract StableDebtTokenHarness is StableDebtToken {
   constructor(
@@ -11,7 +11,11 @@ contract StableDebtTokenHarness is StableDebtToken {
     string memory symbol,
     address incentivesController
   ) public StableDebtToken(pool, underlyingAsset, name, symbol, incentivesController) {}
-
+	
+	
+   /**
+   Simplification: The user accumulates no interest (the balance increase is always 0).
+   **/
   function balanceOf(address account) public override view returns (uint256) {
     return IncentivizedERC20.balanceOf(account);
   }
@@ -23,4 +27,8 @@ contract StableDebtTokenHarness is StableDebtToken {
   function getIncentivesController() public view returns (address) {
     return address(_incentivesController);
   }
+  
+  function rayWadMul(uint256 aRay, uint256 bWad) external view returns(uint256) {
+	return aRay.rayMul(bWad.wadToRay());
+  }
 }

specs/harness/UserConfigurationHarness.sol

@@ -1,7 +1,7 @@
 pragma solidity 0.6.12;
 pragma experimental ABIEncoderV2;
 
-import {UserConfiguration} from '../../contracts/libraries/configuration/UserConfiguration.sol';
+import {UserConfiguration} from '../../contracts/protocol/libraries/configuration/UserConfiguration.sol';
 
 /*
 A wrapper contract for calling functions from the library UserConfiguration.