feat: ccip 1.5.1 upgrade

.gitmodules

@@ -1,3 +1,7 @@
 [submodule "lib/aave-helpers"]
 	path = lib/aave-helpers
 	url = https://github.com/bgd-labs/aave-helpers
+[submodule "lib/ccip"]
+	path = lib/ccip
+	url = https://github.com/aave/ccip
+	branch = feat/1_5_1_token_pool

diffs/AaveV3Ethereum_GHOCCIP151Upgrade_20241209_before_AaveV3Ethereum_GHOCCIP151Upgrade_20241209_after.md

@@ -0,0 +1,19 @@
+## Emodes changed
+
+### EMode: ETH correlated(id: 1)
+
+
+
+### EMode: sUSDe Stablecoins(id: 2)
+
+
+
+### EMode: rsETH LST main(id: 3)
+
+
+
+## Raw diff
+
+```json
+{}
+```

remappings.txt

@@ -3,3 +3,4 @@ aave-helpers/=lib/aave-helpers/
 aave-v3-origin/=lib/aave-helpers/lib/aave-address-book/lib/aave-v3-origin/src/
 forge-std/=lib/aave-helpers/lib/forge-std/src/
 solidity-utils/=lib/aave-helpers/lib/aave-address-book/lib/aave-v3-origin/lib/solidity-utils/src
+aave-ccip/=lib/ccip/contracts/src/v0.8/ccip

src/20241209_Multi_GHOCCIP151Upgrade/AaveV3Arbitrum_GHOCCIP151Upgrade_20241209.sol

@@ -2,14 +2,116 @@
 pragma solidity ^0.8.0;
 
 import {IProposalGenericExecutor} from 'aave-helpers/src/interfaces/IProposalGenericExecutor.sol';
+import {ProxyAdmin} from 'solidity-utils/contracts/transparent-proxy/ProxyAdmin.sol';
+import {TransparentUpgradeableProxy} from 'solidity-utils/contracts/transparent-proxy/TransparentUpgradeableProxy.sol';
+import {MiscEthereum} from 'aave-address-book/MiscEthereum.sol';
+import {MiscArbitrum} from 'aave-address-book/MiscArbitrum.sol';
+import {AaveV3ArbitrumAssets} from 'aave-address-book/AaveV3Arbitrum.sol';
+import {ITokenAdminRegistry} from 'src/interfaces/ccip/ITokenAdminRegistry.sol';
+import {IUpgradeableBurnMintTokenPool_1_4, IUpgradeableBurnMintTokenPool_1_5_1} from 'src/interfaces/ccip/tokenPool/IUpgradeableBurnMintTokenPool.sol';
+import {IGhoToken} from 'src/interfaces/IGhoToken.sol';
+import {IRateLimiter} from 'src/interfaces/ccip/IRateLimiter.sol';
+
+contract Burner {
+  function burn(address token, uint256 amount) external {
+    IGhoToken(token).burn(amount);
+  }
+}
+
 /**
  * @title GHO CCIP 1.5.1 Upgrade
  * @author Aave Labs
  * - Snapshot: TODO
  * - Discussion: TODO
  */
 contract AaveV3Arbitrum_GHOCCIP151Upgrade_20241209 is IProposalGenericExecutor {
+  uint64 public constant ETH_CHAIN_SELECTOR = 5009297550715157269;
+
+  // https://arbiscan.io/address/0x39AE1032cF4B334a1Ed41cdD0833bdD7c7E7751E
+  ITokenAdminRegistry public constant TOKEN_ADMIN_REGISTRY =
+    ITokenAdminRegistry(0x39AE1032cF4B334a1Ed41cdD0833bdD7c7E7751E);
+
+  // https://arbiscan.io/address/0xF168B83598516A532a85995b52504a2Fa058C068
+  IUpgradeableBurnMintTokenPool_1_4 public constant EXISTING_TOKEN_POOL =
+    IUpgradeableBurnMintTokenPool_1_4(0xF168B83598516A532a85995b52504a2Fa058C068); // MiscArbitrum.GHO_CCIP_TOKEN_POOL; -> not using since this will be overwritten with new token pool address
+  IUpgradeableBurnMintTokenPool_1_5_1 public immutable NEW_TOKEN_POOL;
+
+  // https://etherscan.io/address/0x9Ec9F9804733df96D1641666818eFb5198eC50f0
+  address public constant EXISTING_REMOTE_POOL_ETH = 0x9Ec9F9804733df96D1641666818eFb5198eC50f0; // ProxyPool on ETH
+  address public immutable NEW_REMOTE_POOL_ETH;
+
+  ProxyAdmin public constant PROXY_ADMIN = ProxyAdmin(MiscArbitrum.PROXY_ADMIN);
+  IGhoToken public constant GHO = IGhoToken(AaveV3ArbitrumAssets.GHO_UNDERLYING);
+
+  constructor(address newTokenPoolArb, address newTokenPoolEth) {
+    NEW_TOKEN_POOL = IUpgradeableBurnMintTokenPool_1_5_1(newTokenPoolArb);
+    NEW_REMOTE_POOL_ETH = newTokenPoolEth;
+  }
+
   function execute() external {
-    // custom code goes here
+    _acceptOwnership();
+    _migrateLiquidity();
+    _setupAndRegisterNewPool();
+  }
+
+  // pre-req - chainlink transfers gho token pool ownership on token admin registry
+  function _acceptOwnership() internal {
+    NEW_TOKEN_POOL.acceptOwnership();
+    TOKEN_ADMIN_REGISTRY.acceptAdminRole(AaveV3ArbitrumAssets.GHO_UNDERLYING);
+  }
+
+  function _migrateLiquidity() internal {
+    // bucketLevel === bridgedAmount
+    (uint256 bucketCapacity, uint256 bucketLevel) = GHO.getFacilitatorBucket(
+      address(EXISTING_TOKEN_POOL)
+    );
+
+    GHO.addFacilitator(address(NEW_TOKEN_POOL), 'CCIP v1.5.1 TokenPool', uint128(bucketCapacity));
+    NEW_TOKEN_POOL.transferLiquidity(address(EXISTING_TOKEN_POOL), bucketLevel);
+
+    address existingTokenPoolImpl = PROXY_ADMIN.getProxyImplementation(
+      TransparentUpgradeableProxy(payable(address(EXISTING_TOKEN_POOL)))
+    );
+    PROXY_ADMIN.upgrade(
+      TransparentUpgradeableProxy(payable(address(EXISTING_TOKEN_POOL))),
+      address(new Burner())
+    );
+    Burner(address(EXISTING_TOKEN_POOL)).burn(address(GHO), bucketLevel);
+    PROXY_ADMIN.upgrade(
+      TransparentUpgradeableProxy(payable(address(EXISTING_TOKEN_POOL))),
+      existingTokenPoolImpl
+    );
+
+    GHO.removeFacilitator(address(EXISTING_TOKEN_POOL));
+  }
+
+  function _setupAndRegisterNewPool() internal {
+    IRateLimiter.Config memory emptyRateLimiterConfig = IRateLimiter.Config({
+      isEnabled: false,
+      capacity: 0,
+      rate: 0
+    });
+
+    IUpgradeableBurnMintTokenPool_1_5_1.ChainUpdate[]
+      memory chains = new IUpgradeableBurnMintTokenPool_1_5_1.ChainUpdate[](1);
+
+    bytes[] memory remotePoolAddresses = new bytes[](2);
+    remotePoolAddresses[0] = abi.encode(EXISTING_REMOTE_POOL_ETH);
+    remotePoolAddresses[1] = abi.encode(NEW_REMOTE_POOL_ETH);
+
+    chains[0] = IUpgradeableBurnMintTokenPool_1_5_1.ChainUpdate({
+      remoteChainSelector: ETH_CHAIN_SELECTOR,
+      remotePoolAddresses: remotePoolAddresses,
+      remoteTokenAddress: abi.encode(MiscEthereum.GHO_TOKEN),
+      outboundRateLimiterConfig: emptyRateLimiterConfig,
+      inboundRateLimiterConfig: emptyRateLimiterConfig
+    });
+
+    // setup new pool
+    NEW_TOKEN_POOL.applyChainUpdates(new uint64[](0), chains);
+    NEW_TOKEN_POOL.setRateLimitAdmin(EXISTING_TOKEN_POOL.getRateLimitAdmin()); // GhoCcipSteward
+
+    // register new pool
+    TOKEN_ADMIN_REGISTRY.setPool(address(GHO), address(NEW_TOKEN_POOL));
   }
 }