ERC20Bridgable (ERC-7802) (#5735)

Co-authored-by: ernestognw <ernestognw@gmail.com>
Co-authored-by: Arr00 <13561405+arr00@users.noreply.github.com>

contracts/interfaces/README.adoc

@@ -45,6 +45,7 @@ are useful to interact with third party contracts that implement them.
 - {IERC6909Metadata}
 - {IERC6909TokenSupply}
 - {IERC7674}
+- {IERC7802}
 
 == Detailed ABI
 
@@ -97,3 +98,5 @@ are useful to interact with third party contracts that implement them.
 {{IERC6909TokenSupply}}
 
 {{IERC7674}}
+
+{{IERC7802}}

contracts/interfaces/draft-IERC7802.sol

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.6.2;
+
+import {IERC165} from "./IERC165.sol";
+
+/// @title IERC7802
+/// @notice Defines the interface for crosschain ERC20 transfers.
+interface IERC7802 is IERC165 {
+    /// @notice Emitted when a crosschain transfer mints tokens.
+    /// @param to       Address of the account tokens are being minted for.
+    /// @param amount   Amount of tokens minted.
+    /// @param sender   Address of the caller (msg.sender) who invoked crosschainMint.
+    event CrosschainMint(address indexed to, uint256 amount, address indexed sender);
+
+    /// @notice Emitted when a crosschain transfer burns tokens.
+    /// @param from     Address of the account tokens are being burned from.
+    /// @param amount   Amount of tokens burned.
+    /// @param sender   Address of the caller (msg.sender) who invoked crosschainBurn.
+    event CrosschainBurn(address indexed from, uint256 amount, address indexed sender);
+
+    /// @notice Mint tokens through a crosschain transfer.
+    /// @param _to     Address to mint tokens to.
+    /// @param _amount Amount of tokens to mint.
+    function crosschainMint(address _to, uint256 _amount) external;
+
+    /// @notice Burn tokens through a crosschain transfer.
+    /// @param _from   Address to burn tokens from.
+    /// @param _amount Amount of tokens to burn.
+    function crosschainBurn(address _from, uint256 _amount) external;
+}