feat : new position managers

src/libraries/types/EIP712Types.sol

@@ -80,4 +80,22 @@ library EIP712Types {
     uint256 nonce;
     uint256 deadline;
   }
+
+  struct WithdrawPermit {
+    address owner;
+    address spender;
+    uint256 reserveId;
+    uint256 amount;
+    uint256 nonce;
+    uint256 deadline;
+  }
+
+  struct CreditDelegation {
+    address owner;
+    address spender;
+    uint256 reserveId;
+    uint256 amount;
+    uint256 nonce;
+    uint256 deadline;
+  }
 }

src/position-manager/CreditDelegationPositionManager.sol

@@ -0,0 +1,89 @@
+// SPDX-License-Identifier: UNLICENSED
+// Copyright (c) 2025 Aave Labs
+pragma solidity 0.8.28;
+
+import {SignatureChecker} from 'src/dependencies/openzeppelin/SignatureChecker.sol';
+import {SafeERC20, IERC20} from 'src/dependencies/openzeppelin/SafeERC20.sol';
+import {EIP712} from 'src/dependencies/solady/EIP712.sol';
+import {NoncesKeyed} from 'src/utils/NoncesKeyed.sol';
+import {EIP712Hash, EIP712Types} from 'src/position-manager/libraries/EIP712Hash.sol';
+import {PositionManagerBase} from 'src/position-manager/PositionManagerBase.sol';
+import {ICreditDelegationPositionManager} from 'src/position-manager/interfaces/ICreditDelegationPositionManager.sol';
+
+/// @title CreditDelegationPositionManager
+/// @author Aave Labs
+/// @notice Position manager to handle credit delegation and borrow actions on behalf of users.
+contract CreditDelegationPositionManager is
+  ICreditDelegationPositionManager,
+  PositionManagerBase,
+  NoncesKeyed,
+  EIP712
+{
+  using SafeERC20 for IERC20;
+  using EIP712Hash for *;
+
+  /// @notice Mapping of credit delegations: owner => spender => reserveId => amount.
+  mapping(address => mapping(address => mapping(uint256 => uint256))) private _creditDelegations;
+
+  /// @dev Constructor.
+  /// @param spoke_ The address of the spoke contract.
+  constructor(address spoke_) PositionManagerBase(spoke_) {}
+
+  /// @inheritdoc ICreditDelegationPositionManager
+  function approveCreditDelegation(address spender, uint256 reserveId, uint256 amount) external {
+    _creditDelegations[msg.sender][spender][reserveId] = amount;
+    emit CreditDelegation(msg.sender, spender, reserveId, amount);
+  }
+
+  /// @inheritdoc ICreditDelegationPositionManager
+  function approveCreditDelegationWithSig(
+    EIP712Types.CreditDelegation calldata params,
+    bytes calldata signature
+  ) external {
+    require(block.timestamp <= params.deadline, InvalidSignature());
+    address user = params.owner;
+    bytes32 digest = _hashTypedData(params.hash());
+    require(SignatureChecker.isValidSignatureNow(user, digest, signature), InvalidSignature());
+    _useCheckedNonce(user, params.nonce);
+
+    _creditDelegations[user][params.spender][params.reserveId] = params.amount;
+    emit CreditDelegation(user, params.spender, params.reserveId, params.amount);
+  }
+
+  /// @inheritdoc ICreditDelegationPositionManager
+  function borrowOnBehalfOf(
+    uint256 reserveId,
+    uint256 amount,
+    address onBehalfOf
+  ) external returns (uint256, uint256) {
+    uint256 currentAllowance = _creditDelegations[onBehalfOf][msg.sender][reserveId];
+    if (currentAllowance < amount) {
+      revert InsufficientCreditDelegation();
+    }
+    _creditDelegations[onBehalfOf][msg.sender][reserveId] -= amount;
+
+    IERC20 asset = _getReserveUnderlying(reserveId);
+    (uint256 borrowedShares, uint256 borrowedAmount) = SPOKE.borrow(reserveId, amount, onBehalfOf);
+    asset.safeTransfer(msg.sender, borrowedAmount);
+
+    return (borrowedShares, borrowedAmount);
+  }
+
+  /// @inheritdoc ICreditDelegationPositionManager
+  function creditDelegationAllowance(
+    address owner,
+    address spender,
+    uint256 reserveId
+  ) external view returns (uint256) {
+    return _creditDelegations[owner][spender][reserveId];
+  }
+
+  /// @inheritdoc ICreditDelegationPositionManager
+  function CREDIT_DELEGATION_TYPEHASH() external pure returns (bytes32) {
+    return EIP712Hash.CREDIT_DELEGATION_TYPEHASH;
+  }
+
+  function _domainNameAndVersion() internal pure override returns (string memory, string memory) {
+    return ('CreditDelegationPositionManager', '1');
+  }
+}

src/position-manager/PositionManagerBase.sol

@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: UNLICENSED
+// Copyright (c) 2025 Aave Labs
+pragma solidity 0.8.28;
+
+import {SafeERC20, IERC20} from 'src/dependencies/openzeppelin/SafeERC20.sol';
+import {IERC20Permit} from 'src/dependencies/openzeppelin/IERC20Permit.sol';
+import {Multicall} from 'src/utils/Multicall.sol';
+import {EIP712Types} from 'src/libraries/types/EIP712Types.sol';
+import {ISpoke} from 'src/spoke/interfaces/ISpoke.sol';
+import {IPositionManagerBase} from 'src/position-manager/interfaces/IPositionManagerBase.sol';
+
+/// @title PositionManagerBase
+/// @author Aave Labs
+/// @notice Base implementation for position manager common functionalities.
+abstract contract PositionManagerBase is IPositionManagerBase, Multicall {
+  using SafeERC20 for IERC20;
+
+  /// @inheritdoc IPositionManagerBase
+  ISpoke public immutable override SPOKE;
+
+  /// @dev Constructor.
+  /// @param spoke_ The address of the spoke contract.
+  constructor(address spoke_) {
+    require(spoke_ != address(0), InvalidAddress());
+    SPOKE = ISpoke(spoke_);
+  }
+
+  /// @inheritdoc IPositionManagerBase
+  function setSelfAsUserPositionManagerWithSig(
+    EIP712Types.SetUserPositionManager calldata params,
+    bytes calldata signature
+  ) external {
+    try
+      SPOKE.setUserPositionManagerWithSig(
+        address(this),
+        params.user,
+        params.approve,
+        params.nonce,
+        params.deadline,
+        signature
+      )
+    {} catch {}
+  }
+
+  /// @inheritdoc IPositionManagerBase
+  function permitReserve(
+    uint256 reserveId,
+    address onBehalfOf,
+    uint256 value,
+    uint256 deadline,
+    uint8 permitV,
+    bytes32 permitR,
+    bytes32 permitS
+  ) external {
+    address underlying = address(_getReserveUnderlying(reserveId));
+    try
+      IERC20Permit(underlying).permit({
+        owner: onBehalfOf,
+        spender: address(this),
+        value: value,
+        deadline: deadline,
+        v: permitV,
+        r: permitR,
+        s: permitS
+      })
+    {} catch {}
+  }
+
+  /// @return The underlying asset for `reserveId` on the Spoke.
+  function _getReserveUnderlying(uint256 reserveId) internal view returns (IERC20) {
+    return IERC20(SPOKE.getReserve(reserveId).underlying);
+  }
+}

src/position-manager/SupplyRepayPositionManager.sol

@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: UNLICENSED
+// Copyright (c) 2025 Aave Labs
+pragma solidity 0.8.28;
+
+import {SafeERC20, IERC20} from 'src/dependencies/openzeppelin/SafeERC20.sol';
+import {PositionManagerBase} from 'src/position-manager/PositionManagerBase.sol';
+import {ISupplyRepayPositionManager} from 'src/position-manager/interfaces/ISupplyRepayPositionManager.sol';
+
+/// @title SupplyRepayPositionManager
+/// @author Aave Labs
+/// @notice Position manager to handle supply and repay actions on behalf of users.
+contract SupplyRepayPositionManager is ISupplyRepayPositionManager, PositionManagerBase {
+  using SafeERC20 for IERC20;
+
+  /// @dev Constructor.
+  /// @param spoke_ The address of the spoke contract.
+  constructor(address spoke_) PositionManagerBase(spoke_) {}
+
+  /// @inheritdoc ISupplyRepayPositionManager
+  function supplyOnBehalfOf(
+    uint256 reserveId,
+    uint256 amount,
+    address onBehalfOf
+  ) external returns (uint256, uint256) {
+    IERC20 asset = _getReserveUnderlying(reserveId);
+    asset.safeTransferFrom(msg.sender, address(this), amount);
+    asset.forceApprove(address(SPOKE), amount);
+    return SPOKE.supply(reserveId, amount, onBehalfOf);
+  }
+
+  /// @inheritdoc ISupplyRepayPositionManager
+  function repayOnBehalfOf(
+    uint256 reserveId,
+    uint256 amount,
+    address onBehalfOf
+  ) external returns (uint256, uint256) {
+    // TODO : see for limitations on repay amount ?
+    IERC20 asset = _getReserveUnderlying(reserveId);
+    asset.safeTransferFrom(msg.sender, address(this), amount);
+    asset.forceApprove(address(SPOKE), amount);
+    return SPOKE.repay(reserveId, amount, onBehalfOf);
+  }
+}

src/position-manager/WithdrawPermitPositionManager.sol

@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: UNLICENSED
+// Copyright (c) 2025 Aave Labs
+pragma solidity 0.8.28;
+
+import {SignatureChecker} from 'src/dependencies/openzeppelin/SignatureChecker.sol';
+import {SafeERC20, IERC20} from 'src/dependencies/openzeppelin/SafeERC20.sol';
+import {EIP712} from 'src/dependencies/solady/EIP712.sol';
+import {NoncesKeyed} from 'src/utils/NoncesKeyed.sol';
+import {EIP712Hash, EIP712Types} from 'src/position-manager/libraries/EIP712Hash.sol';
+import {PositionManagerBase} from 'src/position-manager/PositionManagerBase.sol';
+import {IWithdrawPermitPositionManager} from 'src/position-manager/interfaces/IWithdrawPermitPositionManager.sol';
+
+/// @title WithdrawPermitPositionManager
+/// @author Aave Labs
+/// @notice Position manager to handle withdraw permit actions on behalf of users.
+contract WithdrawPermitPositionManager is
+  IWithdrawPermitPositionManager,
+  PositionManagerBase,
+  NoncesKeyed,
+  EIP712
+{
+  using SafeERC20 for IERC20;
+  using EIP712Hash for *;
+
+  /// @notice Mapping of withdraw allowances: owner => spender => reserveId => amount.
+  mapping(address => mapping(address => mapping(uint256 => uint256))) private _withdrawAllowances;
+
+  /// @dev Constructor.
+  /// @param spoke_ The address of the spoke contract.
+  constructor(address spoke_) PositionManagerBase(spoke_) {}
+
+  /// @inheritdoc IWithdrawPermitPositionManager
+  function approveWithdraw(address spender, uint256 reserveId, uint256 amount) external {
+    _withdrawAllowances[msg.sender][spender][reserveId] = amount;
+    emit WithdrawApproval(msg.sender, spender, reserveId, amount);
+  }
+
+  /// @inheritdoc IWithdrawPermitPositionManager
+  function approveWithdrawWithSig(
+    EIP712Types.WithdrawPermit calldata params,
+    bytes calldata signature
+  ) external {
+    require(block.timestamp <= params.deadline, InvalidSignature());
+    address user = params.owner;
+    bytes32 digest = _hashTypedData(params.hash());
+    require(SignatureChecker.isValidSignatureNow(user, digest, signature), InvalidSignature());
+    _useCheckedNonce(user, params.nonce);
+
+    _withdrawAllowances[user][params.spender][params.reserveId] = params.amount;
+    emit WithdrawApproval(user, params.spender, params.reserveId, params.amount);
+  }
+
+  /// @inheritdoc IWithdrawPermitPositionManager
+  function withdrawOnBehalfOf(
+    uint256 reserveId,
+    uint256 amount,
+    address onBehalfOf
+  ) external returns (uint256, uint256) {
+    uint256 currentAllowance = _withdrawAllowances[onBehalfOf][msg.sender][reserveId];
+    if (currentAllowance < amount) {
+      revert InsufficientWithdrawAllowance();
+    }
+    _withdrawAllowances[onBehalfOf][msg.sender][reserveId] -= amount;
+
+    IERC20 asset = _getReserveUnderlying(reserveId);
+    (uint256 withdrawnShares, uint256 withdrawnAmount) = SPOKE.withdraw(
+      reserveId,
+      amount,
+      onBehalfOf
+    );
+    asset.safeTransfer(msg.sender, withdrawnAmount);
+
+    return (withdrawnShares, withdrawnAmount);
+  }
+
+  /// @inheritdoc IWithdrawPermitPositionManager
+  function withdrawAllowance(
+    address owner,
+    address spender,
+    uint256 reserveId
+  ) external view returns (uint256) {
+    return _withdrawAllowances[owner][spender][reserveId];
+  }
+
+  /// @inheritdoc IWithdrawPermitPositionManager
+  function WITHDRAW_PERMIT_TYPEHASH() external pure returns (bytes32) {
+    return EIP712Hash.WITHDRAW_TYPEHASH;
+  }
+
+  function _domainNameAndVersion() internal pure override returns (string memory, string memory) {
+    return ('WithdrawPermitPositionManager', '1');
+  }
+}

src/position-manager/interfaces/ICreditDelegationPositionManager.sol

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: UNLICENSED
+// Copyright (c) 2025 Aave Labs
+pragma solidity ^0.8.0;
+
+import {EIP712Types} from 'src/libraries/types/EIP712Types.sol';
+import {IPositionManagerBase} from 'src/position-manager/interfaces/IPositionManagerBase.sol';
+
+interface ICreditDelegationPositionManager is IPositionManagerBase {
+  error InsufficientCreditDelegation();
+
+  event CreditDelegation(
+    address indexed owner,
+    address indexed spender,
+    uint256 indexed reserveId,
+    uint256 amount
+  );
+
+  function approveCreditDelegation(address spender, uint256 reserveId, uint256 amount) external;
+
+  function approveCreditDelegationWithSig(
+    EIP712Types.CreditDelegation calldata params,
+    bytes calldata signature
+  ) external;
+
+  function borrowOnBehalfOf(
+    uint256 reserveId,
+    uint256 amount,
+    address onBehalfOf
+  ) external returns (uint256, uint256);
+
+  function creditDelegationAllowance(
+    address owner,
+    address spender,
+    uint256 reserveId
+  ) external view returns (uint256);
+
+  /// @notice Returns the type hash for the CreditDelegation intent.
+  function CREDIT_DELEGATION_TYPEHASH() external view returns (bytes32);
+}