fix(abi): change abiarraytype trait bounds for tuple (#1079)

ethers-contract/tests/common/derive.rs

@@ -572,3 +572,14 @@ fn can_derive_ethcall_for_bytes() {
 
     assert_ethcall::<BatchCall>();
 }
+
+#[test]
+fn can_derive_array_tuples() {
+    #[derive(Clone, Debug, Default, Eq, PartialEq, EthEvent, EthDisplay)]
+    #[ethevent(name = "DiamondCut", abi = "DiamondCut((address,uint8,bytes4[])[],address,bytes)")]
+    pub struct DiamondCutFilter {
+        pub diamond_cut: Vec<(Address, u8, Vec<[u8; 4]>)>,
+        pub init: Address,
+        pub calldata: Bytes,
+    }
+}

ethers-core/src/abi/codec.rs

@@ -252,4 +252,12 @@ mod tests {
         let v = vec![bytes];
         assert_codec(v);
     }
+
+    #[test]
+    fn tuple_array() {
+        let nested: Vec<[u8; 4]> = vec![[0, 0, 0, 1]];
+        assert_codec(nested.clone());
+        let tuple: Vec<(Address, u8, Vec<[u8; 4]>)> = vec![(Address::random(), 0, nested)];
+        assert_codec(tuple);
+    }
 }

ethers-core/src/abi/mod.rs

@@ -164,7 +164,7 @@ macro_rules! impl_abi_type_tuple {
 
         impl<$($ty, )+> AbiArrayType for ($($ty,)+) where
             $(
-                $ty: AbiArrayType,
+                $ty: AbiType,
             )+ {}
     }
 }