Fix commit_hash type in Neuron::commit_weights precompile

Author: ales-otf

runtime/src/precompiles/neuron.rs

@@ -39,7 +39,7 @@ impl NeuronPrecompile {
         handle.try_dispatch_runtime_call(call, RawOrigin::Signed(handle.caller_account_id()))
     }
 
-    #[precompile::public("commitWeights(uint16,uint256)")]
+    #[precompile::public("commitWeights(uint16,bytes32)")]
     #[precompile::payable]
     pub fn commit_weights(
         handle: &mut impl PrecompileHandle,

runtime/src/precompiles/solidity/neuron.abi

@@ -25,9 +25,9 @@
                 "type": "uint16"
             },
             {
-                "internalType": "uint256",
+                "internalType": "bytes32",
                 "name": "commitHash",
-                "type": "uint256"
+                "type": "bytes32"
             }
         ],
         "name": "commitWeights",
@@ -230,4 +230,4 @@
         "stateMutability": "payable",
         "type": "function"
     }
-]
+]

runtime/src/precompiles/solidity/neuron.sol

@@ -99,9 +99,9 @@ interface INeuron {
      * @dev Commits the weights for a neuron.
      *
      * @param netuid The subnet to commit the weights for (uint16).
-     * @param commitHash The commit hash for the weights (uint256).
+     * @param commitHash The commit hash for the weights (bytes32).
      */
-    function commitWeights(uint16 netuid, uint256 commitHash) external payable;
+    function commitWeights(uint16 netuid, bytes32 commitHash) external payable;
 
     /**
      * @dev Reveals the weights for a neuron.