Add Tron support

.env.example

@@ -46,6 +46,7 @@ GNOSIS_CHAIN_RPC=https://public-gno-mainnet.fastnode.io
 VIRTUAL_STABLE_RPC=
 STABLE_RPC=https://stable-mainnet.rpc.sentio.xyz
 TEMPO_RPC=https://rpc.mainnet.tempo.xyz
+TRON_RPC=https://tron-rpc.publicnode.com/jsonrpc
 ROBINHOOD_RPC=https://rpc.mainnet.chain.robinhood.com
 
 # Etherscan now uses a single API key for all chains.

.github/workflows/test.yml

@@ -23,8 +23,10 @@ jobs:
           cache: 'npm'
       - name: Install dependencies
         run: npm ci
+      - name: Add Tron Solc
+        run: mkdir -p ~/.tron/solc/ && cp -n ./bin/soljson_v0.8.26.js ~/.tron/solc/
       - name: Compile contracts
-        run: npm run compile
+        run: npm run compile-all
       - name: Hardhat Tests
         run: FORK_BLOCK_NUMBER=49605395 npm run test
       - name: Hardhat Fork Tests Ethereum

.gitignore

@@ -21,3 +21,11 @@ crytic-export
 
 CLAUDE.md
 .claude/
+
+/artifacts-tron
+/cache-tron
+
+/local-temp
+
+/deployments/localtron
+/deployments/localhost

README.md

@@ -166,3 +166,25 @@ According to CCTP V1 docs, attestation could be produced 9-19 minutes after the
 9. Click Create Batch.
 10. Click Simulate.
 11. Click Send Batch.
+
+# Tron
+
+Tron related modules only work with Node version 20. Latest published compiler is 0.8.24, but tronbox has a 0.8.26 available so we include it in the repo here.
+
+```
+nvm use 20
+
+mkdir -p ~/.tron/solc/
+
+cp -n ./bin/soljson_v0.8.26.js ~/.tron/solc/
+```
+
+To test local deployments on Tron you need to run a local Tron runtime env.
+
+```
+docker pull tronbox/tre
+
+./tron.node.sh
+
+npm run deploy-localtron
+```

contracts/Rebalancer.sol

@@ -42,18 +42,26 @@ contract Rebalancer is
     );
     event ProcessRebalance(uint256 amount, address destinationPool, Provider provider);
     event SetRoute(address destinationPool, Domain destinationDomain, Provider provider, bool isAllowed);
+    event SetThisAddress(Domain domain, bytes32 thisAddress);
 
     error ZeroAmount();
     error RouteDenied();
     error InvalidRoute();
     error UnsupportedProvider();
     error InvalidPoolAssets();
     error InvalidReceivedToken();
+    error DestinationDomainNotSupported();
 
     /// @custom:storage-location erc7201:sprinter.storage.Rebalancer
     struct RebalancerStorage {
         mapping(address pool => BitMaps.BitMap) allowedRoutes;
         EnumerableSet.AddressSet knownPools;
+        mapping(Domain domain => bytes32) thisAddress;
+    }
+
+    struct ThisAddresses {
+        Domain domain;
+        bytes32 thisAddress;
     }
 
     bytes32 private constant STORAGE_LOCATION = 0x81fbb040176d3bdbf3707b380997ee0038798f9e3ad0bae77fff3621ef225c00;
@@ -102,11 +110,13 @@ contract Rebalancer is
         address rebalancer,
         address[] calldata pools,
         Domain[] calldata domains,
-        Provider[] calldata providers
+        Provider[] calldata providers,
+        ThisAddresses[] calldata thisAddresses
     ) external initializer() {
         _grantRole(DEFAULT_ADMIN_ROLE, admin);
         _grantRole(REBALANCER_ROLE, rebalancer);
         _setRoute(pools, domains, providers, true);
+        _setThisAddresses(thisAddresses);
     }
 
     function setRoute(
@@ -118,6 +128,12 @@ contract Rebalancer is
         _setRoute(pools, domains, providers, isAllowed);
     }
 
+    function setThisAddresses(
+        ThisAddresses[] calldata thisAddresses
+    ) external onlyRole(DEFAULT_ADMIN_ROLE) {
+        _setThisAddresses(thisAddresses);
+    }
+
     function _setRoute(
         address[] calldata pools,
         Domain[] calldata domains,
@@ -146,6 +162,24 @@ contract Rebalancer is
         }
     }
 
+    function _setThisAddresses(ThisAddresses[] calldata thisAddresses) internal {
+        RebalancerStorage storage $ = _getStorage();
+        for (uint256 i = 0; i < thisAddresses.length; ++i) {
+            ThisAddresses memory thisAddress = thisAddresses[i];
+            require(thisAddress.domain != DOMAIN, UnsupportedDomain());
+            $.thisAddress[thisAddress.domain] = thisAddress.thisAddress;
+            emit SetThisAddress(thisAddress.domain, thisAddress.thisAddress);
+        }
+    }
+
+    // Address where Rebalancer is deployed on the destination domain.
+    function getThisAddress(Domain domain) public view returns (bytes32) {
+        if (domain == DOMAIN) {
+            return _addressToBytes32(address(this));
+        }
+        return _getStorage().thisAddress[domain];
+    }
+
     function getAllRoutes()
     external view returns (address[] memory pools, Domain[] memory domains, Provider[] memory providers) {
         RebalancerStorage storage $ = _getStorage();
@@ -194,6 +228,8 @@ contract Rebalancer is
         Provider provider,
         bytes calldata extraData
     ) external payable override onlyRole(REBALANCER_ROLE) {
+        bytes32 destinationThisAddress = getThisAddress(destinationDomain);
+        require(destinationThisAddress != bytes32(0), DestinationDomainNotSupported());
         require(amount > 0, ZeroAmount());
         require(isRouteAllowed(sourcePool, DOMAIN, Provider.LOCAL), RouteDenied());
         require(isRouteAllowed(destinationPool, destinationDomain, provider), RouteDenied());
@@ -210,18 +246,24 @@ contract Rebalancer is
             _processRebalanceLOCAL(amount, destinationPool);
         } else
         if (provider == Provider.CCTP_V2) {
-            initiateTransferCCTPV2(ASSETS, amount, destinationPool, destinationDomain);
+            initiateTransferCCTPV2(ASSETS, amount, destinationPool, destinationDomain, destinationThisAddress);
         } else
         if (provider == Provider.GNOSIS_OMNIBRIDGE) {
             // We need to receive the tokens on the rebalancer contract
             // so that we can later call processRebalance(destinationPool, ..., 0x), to make sure we call deposit()
             // on the destination pool and swap tokens if needed.
-            destinationPool = address(this);
-            initiateTransferGnosisOmnibridge(ASSETS, amount, destinationPool, destinationDomain, DOMAIN);
+            destinationPool = _bytes32ToAddress(destinationThisAddress);
+            initiateTransferGnosisOmnibridge(
+                ASSETS,
+                amount,
+                destinationPool,
+                destinationDomain,
+                DOMAIN,
+                destinationThisAddress
+            );
         } else
         if (provider == Provider.USDT0) {
-            destinationPool = address(this);
-            initiateTransferUSDT0(ASSETS, amount, destinationPool, destinationDomain, extraData, _msgSender());
+            initiateTransferUSDT0(ASSETS, amount, destinationThisAddress, destinationDomain, extraData, _msgSender());
         } else {
             revert UnsupportedProvider();
         }

contracts/Repayer.sol

@@ -55,6 +55,7 @@ contract Repayer is
         mapping(address inputToken =>
             mapping(bytes32 outputToken => InputOutputTokenData)) inputOutputTokens;
         mapping(address pool => IERC20 token) poolOnlySupportsToken;
+        mapping(Domain domain => bytes32) thisAddress;
     }
 
     bytes32 private constant STORAGE_LOCATION = 0xa6615d19cc0b2a17ee46271ca76cd3f303efb9bf682e7eb5c4e7290e895cde00;
@@ -81,11 +82,13 @@ contract Repayer is
         int8 localDecimalsGreaterBy,
         bool isAllowed
     );
+    event SetThisAddress(Domain domain, bytes32 thisAddress);
 
     error ZeroAmount();
     error RouteDenied();
     error UnsupportedProvider();
     error InvalidPoolAssets();
+    error DestinationDomainNotSupported();
 
     struct DestinationToken {
         Domain destinationDomain;
@@ -98,6 +101,11 @@ contract Repayer is
         DestinationToken[] destinationTokens;
     }
 
+    struct ThisAddresses {
+        Domain domain;
+        bytes32 thisAddress;
+    }
+
     constructor(
         Domain localDomain,
         IERC20 usdc,
@@ -158,13 +166,15 @@ contract Repayer is
         Domain[] calldata domains,
         Provider[] calldata providers,
         IERC20[] calldata poolOnlySupportsToken,
-        InputOutputToken[] calldata inputOutputTokens
+        InputOutputToken[] calldata inputOutputTokens,
+        ThisAddresses[] calldata thisAddresses
     ) external initializer() {
         _grantRole(DEFAULT_ADMIN_ROLE, admin);
         _grantRole(REPAYER_ROLE, repayer);
         _grantRole(SET_TOKENS_ROLE, setTokens);
         _setRoute(pools, domains, providers, poolOnlySupportsToken, true);
         _setInputOutputTokens(inputOutputTokens, true);
+        _setThisAddresses(thisAddresses);
     }
 
     function setRoute(
@@ -184,6 +194,12 @@ contract Repayer is
         _setInputOutputTokens(inputOutputTokens, isAllowed);
     }
 
+    function setThisAddresses(
+        ThisAddresses[] calldata thisAddresses
+    ) external onlyRole(DEFAULT_ADMIN_ROLE) {
+        _setThisAddresses(thisAddresses);
+    }
+
     /// @notice If the selected provider requires native currency payment to cover fees,
     /// then caller has to include it in the transaction. It is then the responsibility
     /// of the Adapter to forward the payment and return any change back to the caller.
@@ -196,6 +212,8 @@ contract Repayer is
         Provider provider,
         bytes calldata extraData
     ) external payable override onlyRole(REPAYER_ROLE) {
+        bytes32 destinationThisAddress = getThisAddress(destinationDomain);
+        require(destinationThisAddress != bytes32(0), DestinationDomainNotSupported());
         require(amount > 0, ZeroAmount());
         if (token == WRAPPED_NATIVE_TOKEN) {
             uint256 thisBalance = address(this).balance - msg.value;
@@ -221,7 +239,13 @@ contract Repayer is
             _processRepayLOCAL(token, amount, destinationPool);
         } else
         if (provider == Provider.CCTP_V2) {
-            initiateTransferCCTPV2(token, amount, destinationPool, destinationDomain);
+            initiateTransferCCTPV2(
+                token,
+                amount,
+                destinationPool,
+                destinationDomain,
+                destinationThisAddress
+            );
         } else
         if (provider == Provider.ACROSS) {
             initiateTransferAcross(
@@ -261,10 +285,24 @@ contract Repayer is
         if (provider == Provider.GNOSIS_OMNIBRIDGE) {
             // When bridging USDC to Gnosis, we must bridge to self to swap USDCxDAI on Gnosis through process().
             // It is the Repayment Service responsibility to specify Repayer itself as destination explicitly.
-            initiateTransferGnosisOmnibridge(token, amount, destinationPool, destinationDomain, DOMAIN);
+            initiateTransferGnosisOmnibridge(
+                token,
+                amount,
+                destinationPool,
+                destinationDomain,
+                DOMAIN,
+                destinationThisAddress
+            );
         } else
         if (provider == Provider.USDT0) {
-            initiateTransferUSDT0(token, amount, destinationPool, destinationDomain, extraData, _msgSender());
+            initiateTransferUSDT0(
+                token,
+                amount,
+                _addressToBytes32(destinationPool),
+                destinationDomain,
+                extraData,
+                _msgSender()
+            );
         } else
         if (provider == Provider.POLYGON_POS_BRIDGE) {
             // When bridging from Polygon, the PoS exit releases the tokens to the burner, so they
@@ -387,13 +425,31 @@ contract Repayer is
         }
     }
 
+    function _setThisAddresses(ThisAddresses[] calldata thisAddresses) internal {
+        RepayerStorage storage $ = _getStorage();
+        for (uint256 i = 0; i < thisAddresses.length; ++i) {
+            ThisAddresses memory thisAddress = thisAddresses[i];
+            require(thisAddress.domain != DOMAIN, UnsupportedDomain());
+            $.thisAddress[thisAddress.domain] = thisAddress.thisAddress;
+            emit SetThisAddress(thisAddress.domain, thisAddress.thisAddress);
+        }
+    }
+
+    // Address where Repayer is deployed on the destination domain.
+    function getThisAddress(Domain domain) public view returns (bytes32) {
+        if (domain == DOMAIN) {
+            return _addressToBytes32(address(this));
+        }
+        return _getStorage().thisAddress[domain];
+    }
+
     function getAllRoutes()
         external view returns (
             address[] memory pools,
             Domain[] memory domains,
             Provider[] memory providers,
             IERC20[] memory poolOnlySupportsToken
-        ) 
+        )
     {
         RepayerStorage storage $ = _getStorage();
         uint256 totalPools = $.knownPools.length();
@@ -433,9 +489,7 @@ contract Repayer is
     }
 
     function isRouteAllowed(address pool, Domain domain, Provider provider) public view returns (bool) {
-        // As long as we deploy the Repayer contract on the same address on every supported domain this will work.
-        // If we are to ever deploy it to new address, we will need to change this logic.
-        if (pool == address(this)) {
+        if (_addressToBytes32(pool) == getThisAddress(domain)) {
             return true;
         }
         return _getStorage().allowedRoutes[pool].get(_toIndex(domain, provider));

contracts/interfaces/IRoute.sol

@@ -25,7 +25,8 @@ interface IRoute {
         HYPER_EVM,
         TEMPO,
         STABLE,
-        ROBINHOOD
+        ROBINHOOD,
+        TRON
     }
 
     enum Provider {

contracts/testing/RebalancerUSDT0Stable.sol

@@ -89,10 +89,12 @@ contract RebalancerUSDT0Stable {
         IRoute.Provider[] memory providers = new IRoute.Provider[](2);
         providers[0] = IRoute.Provider.LOCAL;
         providers[1] = IRoute.Provider.USDT0;
+        Rebalancer.ThisAddresses[] memory thisAddresses = new Rebalancer.ThisAddresses[](1);
+        thisAddresses[0] = Rebalancer.ThisAddresses(IRoute.Domain.ARBITRUM_ONE, _addressToBytes32(address(this)));
 
         bytes memory initData = abi.encodeCall(
             rebalancerImpl.initialize,
-            (address(this), address(this), pools, domains, providers)
+            (address(this), address(this), pools, domains, providers, thisAddresses)
         );
         TransparentUpgradeableProxy proxy = new TransparentUpgradeableProxy(
             address(rebalancerImpl), address(this), initData

contracts/testing/RebalancerUSDT0Tempo.sol

@@ -93,10 +93,12 @@ contract RebalancerUSDT0Tempo {
         IRoute.Provider[] memory providers = new IRoute.Provider[](2);
         providers[0] = IRoute.Provider.LOCAL;
         providers[1] = IRoute.Provider.USDT0;
+        Rebalancer.ThisAddresses[] memory thisAddresses = new Rebalancer.ThisAddresses[](1);
+        thisAddresses[0] = Rebalancer.ThisAddresses(IRoute.Domain.ARBITRUM_ONE, _addressToBytes32(address(this)));
 
         bytes memory initData = abi.encodeCall(
             rebalancerImpl.initialize,
-            (address(this), address(this), pools, domains, providers)
+            (address(this), address(this), pools, domains, providers, thisAddresses)
         );
         TransparentUpgradeableProxy proxy = new TransparentUpgradeableProxy(
             address(rebalancerImpl), address(this), initData

contracts/testing/RepayerUSDT0Stable.sol

@@ -87,6 +87,8 @@ contract RepayerUSDT0Stable {
         IERC20[] memory onlySupportedTokens = new IERC20[](1);
         onlySupportedTokens[0] = IERC20(address(0));
         Repayer.InputOutputToken[] memory inputOutputTokens = new Repayer.InputOutputToken[](0);
+        Repayer.ThisAddresses[] memory thisAddresses = new Repayer.ThisAddresses[](1);
+        thisAddresses[0] = Repayer.ThisAddresses(IRoute.Domain.ARBITRUM_ONE, _addressToBytes32(address(this)));
 
         bytes memory initData = abi.encodeCall(
             repayerImpl.initialize,
@@ -98,7 +100,8 @@ contract RepayerUSDT0Stable {
                 domains,
                 providers,
                 onlySupportedTokens,
-                inputOutputTokens
+                inputOutputTokens,
+                thisAddresses
             )
         );
         TransparentUpgradeableProxy proxy = new TransparentUpgradeableProxy(