feat: add view function for mint precompile allowlist (#67)

Author: johnletey

crates/ev-precompiles/README.md

@@ -26,6 +26,7 @@ interface INativeToken {
     function burn(address from, uint256 amount) external;
     function addToAllowList(address account) external;
     function removeFromAllowList(address account) external;
+    function allowlist(address account) external view returns (bool);
 }
 ```
 

crates/ev-precompiles/src/mint.rs

@@ -1,6 +1,9 @@
 // Mint precompile
 
-use alloy::{sol, sol_types::SolInterface};
+use alloy::{
+    sol,
+    sol_types::{SolInterface, SolValue},
+};
 use alloy_evm::{
     precompiles::{Precompile, PrecompileInput},
     revm::precompile::{PrecompileError, PrecompileId, PrecompileResult},
@@ -16,6 +19,7 @@ sol! {
         function burn(address from, uint256 amount) external;
         function addToAllowList(address account) external;
         function removeFromAllowList(address account) external;
+        function allowlist(address account) external view returns (bool);
     }
 }
 
@@ -232,6 +236,11 @@ impl Precompile for MintPrecompile {
                 Self::set_allowlisted(internals, call.account, false)?;
                 Ok(PrecompileOutput::new(0, Bytes::new()))
             }
+            INativeToken::INativeTokenCalls::allowlist(call) => {
+                let is_allowed = Self::is_allowlisted(internals, call.account)?;
+                let result = is_allowed.abi_encode();
+                Ok(PrecompileOutput::new(0, result.into()))
+            }
         }
     }
 

docs/adr/ADR-0002-native-minting-precompile.md

@@ -49,6 +49,7 @@ interface INativeToken {
     function burn(address from, uint256 amount) external;
     function addToAllowList(address account) external;
     function removeFromAllowList(address account) external;
+    function allowlist(address account) external view returns (bool);
 }
 ```