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- Added credit delegation interface to debt tokens.

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This commit is contained in:
eboado 2020-11-30 18:16:25 +01:00
parent 0ebcc04d50
commit aa7c124a11
2 changed files with 41 additions and 10 deletions
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28
contracts/interfaces/ICreditDelegationToken.sol Normal file
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@ -0,0 +1,28 @@
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
interface ICreditDelegationToken {
event BorrowAllowanceDelegated(
address indexed fromUser,
address indexed toUser,
address asset,
uint256 amount
);
/**
* @dev delegates borrowing power to a user on the specific debt token
* @param delegatee the address receiving the delegated borrowing power
* @param amount the maximum amount being delegated. Delegation will still
* respect the liquidation constraints (even if delegated, a delegatee cannot
* force a delegator HF to go below 1)
**/
function approveDelegation(address delegatee, uint256 amount) external;
/**
* @dev returns the borrow allowance of the user
* @param fromUser The user to giving allowance
* @param toUser The user to give allowance to
* @return the current allowance of toUser
**/
function borrowAllowance(address fromUser, address toUser) external view returns (uint256);
}

23
contracts/protocol/tokenization/base/DebtTokenBase.sol
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@ -2,6 +2,7 @@
pragma solidity 0.6.12; pragma solidity 0.6.12;
import {ILendingPool} from '../../../interfaces/ILendingPool.sol'; import {ILendingPool} from '../../../interfaces/ILendingPool.sol';
import {ICreditDelegationToken} from '../../../interfaces/ICreditDelegationToken.sol';
import { import {
VersionedInitializable VersionedInitializable
} from '../../libraries/aave-upgradeability/VersionedInitializable.sol'; } from '../../libraries/aave-upgradeability/VersionedInitializable.sol';
@ -14,14 +15,11 @@ import {Errors} from '../../libraries/helpers/Errors.sol';
* @author Aave * @author Aave
*/ */
abstract contract DebtTokenBase is IncentivizedERC20, VersionedInitializable { abstract contract DebtTokenBase is
event BorrowAllowanceDelegated( IncentivizedERC20,
address indexed fromUser, VersionedInitializable,
address indexed toUser, ICreditDelegationToken
address asset, {
uint256 amount
);
address public immutable UNDERLYING_ASSET_ADDRESS; address public immutable UNDERLYING_ASSET_ADDRESS;
ILendingPool public immutable POOL; ILendingPool public immutable POOL;
@ -73,7 +71,7 @@ abstract contract DebtTokenBase is IncentivizedERC20, VersionedInitializable {
* respect the liquidation constraints (even if delegated, a delegatee cannot * respect the liquidation constraints (even if delegated, a delegatee cannot
* force a delegator HF to go below 1) * force a delegator HF to go below 1)
**/ **/
function approveDelegation(address delegatee, uint256 amount) external { function approveDelegation(address delegatee, uint256 amount) external override {
_borrowAllowances[_msgSender()][delegatee] = amount; _borrowAllowances[_msgSender()][delegatee] = amount;
emit BorrowAllowanceDelegated(_msgSender(), delegatee, UNDERLYING_ASSET_ADDRESS, amount); emit BorrowAllowanceDelegated(_msgSender(), delegatee, UNDERLYING_ASSET_ADDRESS, amount);
} }
@ -84,7 +82,12 @@ abstract contract DebtTokenBase is IncentivizedERC20, VersionedInitializable {
* @param toUser The user to give allowance to * @param toUser The user to give allowance to
* @return the current allowance of toUser * @return the current allowance of toUser
**/ **/
function borrowAllowance(address fromUser, address toUser) external view returns (uint256) { function borrowAllowance(address fromUser, address toUser)
external
view
override
returns (uint256)
{
return _borrowAllowances[fromUser][toUser]; return _borrowAllowances[fromUser][toUser];
} }