abigen adopt hardhat generated bytecode (#2012)

* abigen adopt hardhat generated bytecode

* update changelog

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Unreleased
 
+- Add abigen support for hardhat generated bytecode json format [#2012](https://github.com/gakonst/ethers-rs/pull/2012)
 - Fix typo in `RwClient` docs for `write_client` method.
 - Add support for Geth `debug_traceCall` [#1949](https://github.com/gakonst/ethers-rs/pull/1949)
 - Graceful handling of WebSocket transport errors [#1889](https://github.com/gakonst/ethers-rs/issues/1889) [#1815](https://github.com/gakonst/ethers-rs/issues/1815)

ethers-core/src/abi/raw.rs

@@ -147,8 +147,10 @@ impl<'de> Visitor<'de> for AbiObjectVisitor {
         let mut bytecode = None;
 
         #[derive(Deserialize)]
-        struct BytecodeObject {
-            object: Bytes,
+        #[serde(untagged)]
+        enum Bytecode {
+            Object { object: Bytes },
+            Bytes(Bytes),
         }
 
         struct DeserializeBytes(Bytes);
@@ -169,9 +171,12 @@ impl<'de> Visitor<'de> for AbiObjectVisitor {
                 }
                 "bytecode" | "byteCode" => {
                     bytecode = map
-                        .next_value::<BytecodeObject>()
+                        .next_value::<Bytecode>()
                         .ok()
-                        .map(|obj| obj.object)
+                        .map(|obj| match obj {
+                            Bytecode::Object { object } => object,
+                            Bytecode::Bytes(bytes) => bytes,
+                        })
                         .filter(|bytecode| !bytecode.0.is_empty());
                 }
                 "bin" => {
@@ -263,6 +268,9 @@ mod tests {
         let s = format!(r#"{{"abi": {abi_str}, "bytecode" : {{ "object": "{code}" }} }}"#);
         assert_has_bytecode(&s);
 
+        let s = format!(r#"{{"abi": {abi_str}, "bytecode" : "{code}" }}"#);
+        assert_has_bytecode(&s);
+
         let hh_artifact = include_str!(
             "../../../ethers-contract/tests/solidity-contracts/verifier_abi_hardhat.json"
         );

examples/contracts/examples/deploy_from_abi_and_bytecode.rs

@@ -10,8 +10,8 @@ use std::{convert::TryFrom, sync::Arc, time::Duration};
 
 // Generate the type-safe contract bindings by providing the json artifact
 // *Note*: this requires a `bytecode` and `abi` object in the `greeter.json` artifact:
-// `{"abi": [..], "bin": "..."}`  or `{"abi": [..], "bytecode": {"object": "..."}}`
-// this will embedd the bytecode in a variable `GREETER_BYTECODE`
+// `{"abi": [..], "bin": "..."}` , `{"abi": [..], "bytecode": {"object": "..."}}` or
+// `{"abi": [..], "bytecode": "..."}` this will embedd the bytecode in a variable `GREETER_BYTECODE`
 abigen!(Greeter, "ethers-contract/tests/solidity-contracts/greeter.json",);
 
 #[tokio::main]