arbitrum gateways

contracts/_mocks/MockArbitrum.sol

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+// SPDX-License-Identifier: GPL-3.0-or-later
+pragma solidity 0.6.11;
+pragma experimental ABIEncoderV2;
+
+import {InboxMock} from "arb-bridge-peripherals/contracts/tokenbridge/test/InboxMock.sol";
+import {L1ArbitrumMessenger} from "arb-bridge-peripherals/contracts/tokenbridge/ethereum/L1ArbitrumMessenger.sol";
+import {L2ArbitrumMessenger} from "arb-bridge-peripherals/contracts/tokenbridge/arbitrum/L2ArbitrumMessenger.sol";
+import {L1ArbitrumTestMessenger} from "arb-bridge-peripherals/contracts/tokenbridge/test/GatewayTest.sol";
+import {L2ArbitrumTestMessenger} from "arb-bridge-peripherals/contracts/tokenbridge/test/GatewayTest.sol";
+import {IBridge} from "arb-bridge-peripherals/contracts/tokenbridge/test/GatewayTest.sol";
+import {AMPLArbitrumGateway} from "../base-chain/bridge-gateways/AMPLArbitrumGateway.sol";
+import {ArbitrumXCAmpleGateway} from "../satellite-chain/bridge-gateways/ArbitrumXCAmpleGateway.sol";
+
+contract MockArbitrumInbox is InboxMock {}
+
+// Mocking sendTxToL2
+// https://shorturl.at/dgABO
+contract MockAMPLArbitrumGateway is L1ArbitrumTestMessenger, AMPLArbitrumGateway {
+    constructor(
+        address ampl_,
+        address policy_,
+        address vault_
+    ) public AMPLArbitrumGateway(ampl_, policy_, vault_) {}
+
+    function sendTxToL2(
+        address _inbox,
+        address _to,
+        address _user,
+        uint256 _l1CallValue,
+        uint256 _l2CallValue,
+        uint256 _maxSubmissionCost,
+        uint256 _maxGas,
+        uint256 _gasPriceBid,
+        bytes memory _data
+    ) internal virtual override(L1ArbitrumMessenger, L1ArbitrumTestMessenger) returns (uint256) {
+        return
+            L1ArbitrumTestMessenger.sendTxToL2(
+                _inbox,
+                _to,
+                _user,
+                _l1CallValue,
+                _l2CallValue,
+                _maxSubmissionCost,
+                _maxGas,
+                _gasPriceBid,
+                _data
+            );
+    }
+
+    function getL2ToL1Sender(address _inbox)
+        internal
+        view
+        virtual
+        override(L1ArbitrumMessenger, L1ArbitrumTestMessenger)
+        returns (address)
+    {
+        return L1ArbitrumTestMessenger.getL2ToL1Sender(_inbox);
+    }
+
+    function getBridge(address _inbox)
+        internal
+        view
+        virtual
+        override(L1ArbitrumMessenger, L1ArbitrumTestMessenger)
+        returns (IBridge)
+    {
+        return L1ArbitrumTestMessenger.getBridge(_inbox);
+    }
+}
+
+contract MockArbitrumXCAmpleGateway is L2ArbitrumTestMessenger, ArbitrumXCAmpleGateway {
+    constructor(address xcAmple_, address xcController_)
+        public
+        ArbitrumXCAmpleGateway(xcAmple_, xcController_)
+    {}
+
+    function sendTxToL1(
+        uint256 _l1CallValue,
+        address _from,
+        address _to,
+        bytes memory _data
+    ) internal virtual override(L2ArbitrumMessenger, L2ArbitrumTestMessenger) returns (uint256) {
+        return L2ArbitrumTestMessenger.sendTxToL1(_l1CallValue, _from, _to, _data);
+    }
+}

contracts/_test/UFragmentsTestnet.sol

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+// SPDX-License-Identifier: GPL-3.0-or-later
+// Importing uFragments contract dependencies to be compiled for integration tests
+pragma solidity 0.7.6;
+
+import {UFragments} from "uFragments/contracts/UFragments.sol";
+
+contract UFragmentsTestnet is UFragments {
+    event Result(bool result, bytes reason);
+
+    function isArbitrumEnabled() external view returns (uint8) {
+        return uint8(0xa4b1);
+    }
+
+    // NOTE: this allows the token contarct to register itself with the bridge on testnet
+    // The AMPL contract on mainnet is immutable and this can't be used!
+    function externalCall(
+        address destination,
+        bytes calldata data,
+        uint256 value
+    ) external payable {
+        (bool result, bytes memory reason) = destination.call{value: value}(data);
+        emit Result(result, reason);
+    }
+}