File size: 2,798 Bytes
8072076 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | // SPDX-License-Identifier: MIT
pragma solidity 0.8.26;
/// @title Constitution - the immutable rulebook of the Ethan protocol (AEP-1)
/// @notice Every rule is fixed at deployment. There is no owner, no setter,
/// no upgrade path. Changing any rule requires deploying a whole new
/// protocol version and moving funds to it by proposal.
contract Constitution {
uint8 public constant ACTION_SUPPLY = 1;
uint8 public constant ACTION_WITHDRAW = 2;
uint8 public constant ACTION_TRANSFER = 3;
address public immutable USDC;
address public immutable AAVE_POOL;
address public immutable A_TOKEN;
address public immutable BENEFICIARY;
uint256 public immutable MAX_BPS;
uint256 public immutable ABSOLUTE_CAP;
uint256 public immutable COOLDOWN;
uint256 public immutable TIMELOCK;
uint256 public immutable EXECUTION_WINDOW;
uint256 internal constant BPS_DENOMINATOR = 10_000;
error ZeroAddress();
error InvalidParameter();
constructor(
address usdc,
address aavePool,
address aToken,
address beneficiary,
uint256 maxBps,
uint256 absoluteCap,
uint256 cooldown,
uint256 timelock,
uint256 executionWindow
) {
if (usdc == address(0) || aavePool == address(0) || aToken == address(0) || beneficiary == address(0)) {
revert ZeroAddress();
}
if (maxBps == 0 || maxBps > BPS_DENOMINATOR) revert InvalidParameter();
if (absoluteCap == 0) revert InvalidParameter();
if (timelock == 0 || executionWindow == 0) revert InvalidParameter();
// Hard upper bounds keep uint64 timestamp math safe and rule out
// absurd deployments (nothing may be locked in for over a year).
if (timelock > 365 days || executionWindow > 365 days || cooldown > 365 days) revert InvalidParameter();
USDC = usdc;
AAVE_POOL = aavePool;
A_TOKEN = aToken;
BENEFICIARY = beneficiary;
MAX_BPS = maxBps;
ABSOLUTE_CAP = absoluteCap;
COOLDOWN = cooldown;
TIMELOCK = timelock;
EXECUTION_WINDOW = executionWindow;
}
function isValidAction(uint8 action) public pure returns (bool) {
return action == ACTION_SUPPLY || action == ACTION_WITHDRAW || action == ACTION_TRANSFER;
}
/// @notice The largest amount a single execution may move, given the
/// current total treasury value (liquid USDC + aToken balance).
function maxExecutionAmount(uint256 treasuryTotal) public view returns (uint256) {
uint256 bpsCap = (treasuryTotal * MAX_BPS) / BPS_DENOMINATOR;
return bpsCap < ABSOLUTE_CAP ? bpsCap : ABSOLUTE_CAP;
}
} |