[Rust/Greenfield]: Move BNB Greenfield to Rust (#3597)

* [Greenfield]: Generate Rust skeleton for BNB Greenfield

* [Greenfield]: Add `Eip712Preimager`

* [Greenfield]: Continue implementing tx signing

* Add `TxBuilder`
* TODO add `TransferOut` message

* [Greenfield]: Small refactoring

* [Greenfield]: Add a signer test, fix bugs

* [Greenfield]: Add support for TransferOut message

* [Greenfield]: Finish implementing `Signer` and `Compiler`

* [Greenfield]: Add a signing test, fix Signer

* [Greenfield]: Add missing tests, mainnet as well

* [Greenfield]: Add compile test

* [Greenfield]: Fix TODO

* [Greenfield]: Remove C++ implementation

* [Greenfield]: Minor changes

* [Greenfield]: Move Cosmos protobuf directory to `tw_cosmos_sdk`

* [Greenfield]: Add fuzz test

* [Greenfield]: Update chainId

* [CI] Trigger CI

* [Greenfield]: Fix fmt

* [Greenfield]: Fix kmp sample

registry.json

@@ -4180,7 +4180,7 @@
     "coinId": 5600,
     "symbol": "BNB",
     "decimals": 18,
-    "chainId": "9000",
+    "chainId": "1017",
     "blockchain": "Greenfield",
     "derivation": [
       {

rust/Cargo.toml

@@ -2,6 +2,7 @@
 members = [
     "chains/tw_binance",
     "chains/tw_cosmos",
+    "chains/tw_greenfield",
     "chains/tw_native_evmos",
     "chains/tw_native_injective",
     "chains/tw_thorchain",

rust/chains/tw_greenfield/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "tw_greenfield"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+tw_coin_entry = { path = "../../tw_coin_entry" }
+tw_cosmos_sdk = { path = "../../tw_cosmos_sdk" }
+tw_encoding = { path = "../../tw_encoding" }
+tw_evm = { path = "../../tw_evm" }
+tw_hash = { path = "../../tw_hash" }
+tw_keypair = { path = "../../tw_keypair" }
+tw_memory = { path = "../../tw_memory" }
+tw_misc = { path = "../../tw_misc" }
+tw_number = { path = "../../tw_number" }
+tw_proto = { path = "../../tw_proto" }
+
+[dev-dependencies]
+tw_coin_entry = { path = "../../tw_coin_entry", features = ["test-utils"] }
+tw_misc = { path = "../../tw_misc", features = ["test-utils"] }

rust/chains/tw_greenfield/fuzz/.gitignore

@@ -0,0 +1,5 @@
+target
+corpus
+artifacts
+coverage
+Cargo.lock

rust/chains/tw_greenfield/fuzz/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+name = "tw_greenfield-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+tw_any_coin = { path = "../../../tw_any_coin", features = ["test-utils"] }
+tw_coin_registry = { path = "../../../tw_coin_registry" }
+tw_proto = { path = "../../../tw_proto", features = ["fuzz"] }
+
+[dependencies.tw_greenfield]
+path = ".."
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[profile.release]
+debug = 1
+
+[[bin]]
+name = "sign"
+path = "fuzz_targets/sign.rs"
+test = false
+doc = false

rust/chains/tw_greenfield/fuzz/fuzz_targets/sign.rs

@@ -0,0 +1,11 @@
+#![no_main]
+
+use libfuzzer_sys::fuzz_target;
+use tw_any_coin::test_utils::sign_utils::AnySignerHelper;
+use tw_coin_registry::coin_type::CoinType;
+use tw_proto::Greenfield::Proto;
+
+fuzz_target!(|input: Proto::SigningInput<'_>| {
+    let mut signer = AnySignerHelper::<Proto::SigningOutput>::default();
+    let _ = signer.sign(CoinType::Greenfield, input);
+});

rust/chains/tw_greenfield/src/address.rs

@@ -0,0 +1,56 @@
+// Copyright © 2017-2023 Trust Wallet.
+//
+// This file is part of Trust. The full Trust copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
+use serde::Serialize;
+use std::fmt;
+use std::str::FromStr;
+use tw_coin_entry::coin_context::CoinContext;
+use tw_coin_entry::coin_entry::CoinAddress;
+use tw_coin_entry::error::{AddressError, AddressResult};
+use tw_cosmos_sdk::address::CosmosAddress;
+use tw_evm::address::Address as EthereumAddress;
+use tw_keypair::ecdsa::secp256k1;
+use tw_memory::Data;
+
+#[derive(Clone, Serialize)]
+pub struct GreenfieldAddress(EthereumAddress);
+
+impl GreenfieldAddress {
+    /// Initializes an address with a `secp256k1` public key.
+    pub fn with_secp256k1_pubkey(pubkey: &secp256k1::PublicKey) -> GreenfieldAddress {
+        GreenfieldAddress(EthereumAddress::with_secp256k1_pubkey(pubkey))
+    }
+}
+
+impl CosmosAddress for GreenfieldAddress {
+    fn from_str_with_coin(_coin: &dyn CoinContext, addr: &str) -> AddressResult<Self>
+    where
+        Self: Sized,
+    {
+        GreenfieldAddress::from_str(addr)
+    }
+}
+
+impl CoinAddress for GreenfieldAddress {
+    #[inline]
+    fn data(&self) -> Data {
+        self.0.data()
+    }
+}
+
+impl FromStr for GreenfieldAddress {
+    type Err = AddressError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        EthereumAddress::from_str(s).map(GreenfieldAddress)
+    }
+}
+
+impl fmt::Display for GreenfieldAddress {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}

rust/chains/tw_greenfield/src/compiler.rs

@@ -0,0 +1,111 @@
+// Copyright © 2017-2023 Trust Wallet.
+//
+// This file is part of Trust. The full Trust copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
+use crate::context::GreenfieldContext;
+use crate::modules::eip712_signer::{Eip712Signer, Eip712TxPreimage};
+use crate::modules::tx_builder::TxBuilder;
+use crate::public_key::GreenfieldPublicKey;
+use crate::signature::GreenfieldSignature;
+use std::borrow::Cow;
+use tw_coin_entry::coin_context::CoinContext;
+use tw_coin_entry::coin_entry::{PublicKeyBytes, SignatureBytes};
+use tw_coin_entry::common::compile_input::SingleSignaturePubkey;
+use tw_coin_entry::error::{SigningError, SigningErrorType, SigningResult};
+use tw_coin_entry::signing_output_error;
+use tw_cosmos_sdk::modules::broadcast_msg::{BroadcastMode, BroadcastMsg};
+use tw_cosmos_sdk::modules::serializer::json_serializer::JsonSerializer;
+use tw_cosmos_sdk::modules::serializer::protobuf_serializer::ProtobufSerializer;
+use tw_cosmos_sdk::public_key::CosmosPublicKey;
+use tw_misc::traits::ToBytesVec;
+use tw_proto::Greenfield::Proto;
+use tw_proto::TxCompiler::Proto as CompilerProto;
+
+pub struct GreenfieldCompiler;
+
+impl GreenfieldCompiler {
+    /// Please note that [`Proto::SigningInput::public_key`] must be set.
+    /// If the public key should be derived from a private key, please do it before this method is called.
+    #[inline]
+    pub fn preimage_hashes(
+        coin: &dyn CoinContext,
+        input: Proto::SigningInput<'_>,
+    ) -> CompilerProto::PreSigningOutput<'static> {
+        Self::preimage_hashes_impl(coin, input)
+            .unwrap_or_else(|e| signing_output_error!(CompilerProto::PreSigningOutput, e))
+    }
+
+    fn preimage_hashes_impl(
+        coin: &dyn CoinContext,
+        input: Proto::SigningInput<'_>,
+    ) -> SigningResult<CompilerProto::PreSigningOutput<'static>> {
+        let unsigned = TxBuilder::unsigned_tx_from_proto(coin, &input)?;
+        let Eip712TxPreimage { eip712_tx, tx_hash } = Eip712Signer::preimage_hash(&unsigned)?;
+
+        Ok(CompilerProto::PreSigningOutput {
+            data: Cow::from(eip712_tx.to_vec()),
+            data_hash: Cow::from(tx_hash.to_vec()),
+            ..CompilerProto::PreSigningOutput::default()
+        })
+    }
+
+    #[inline]
+    pub fn compile(
+        coin: &dyn CoinContext,
+        input: Proto::SigningInput<'_>,
+        signatures: Vec<SignatureBytes>,
+        public_keys: Vec<PublicKeyBytes>,
+    ) -> Proto::SigningOutput<'static> {
+        Self::compile_impl(coin, input, signatures, public_keys)
+            .unwrap_or_else(|e| signing_output_error!(Proto::SigningOutput, e))
+    }
+
+    pub(crate) fn compile_impl(
+        coin: &dyn CoinContext,
+        mut input: Proto::SigningInput<'_>,
+        signatures: Vec<SignatureBytes>,
+        public_keys: Vec<PublicKeyBytes>,
+    ) -> SigningResult<Proto::SigningOutput<'static>> {
+        let SingleSignaturePubkey {
+            signature: raw_signature,
+            public_key,
+        } = SingleSignaturePubkey::from_sign_pubkey_list(signatures, public_keys)?;
+
+        let public_key = GreenfieldPublicKey::from_bytes(coin, &public_key)?;
+        let signature = GreenfieldSignature::try_from(raw_signature.as_slice())?;
+        let signature_bytes = signature.to_vec();
+
+        // Set the public key. It will be used to construct a signer info.
+        input.public_key = Cow::from(public_key.to_bytes());
+        let unsigned = TxBuilder::unsigned_tx_from_proto(coin, &input)?;
+
+        let signed_tx = unsigned.into_signed(signature);
+        let signed_tx_raw = ProtobufSerializer::<GreenfieldContext>::build_signed_tx(&signed_tx)?;
+
+        let broadcast_mode = Self::broadcast_mode(input.mode);
+        let broadcast_tx = BroadcastMsg::raw(broadcast_mode, &signed_tx_raw).to_json_string();
+
+        let signature_json = JsonSerializer::<GreenfieldContext>::serialize_signature(
+            &public_key,
+            signature_bytes.clone(),
+        );
+        let signature_json = serde_json::to_string(&[signature_json])
+            .map_err(|_| SigningError(SigningErrorType::Error_internal))?;
+
+        Ok(Proto::SigningOutput {
+            signature: Cow::from(signature_bytes),
+            signature_json: Cow::from(signature_json),
+            serialized: Cow::from(broadcast_tx),
+            ..Proto::SigningOutput::default()
+        })
+    }
+
+    fn broadcast_mode(input: Proto::BroadcastMode) -> BroadcastMode {
+        match input {
+            Proto::BroadcastMode::SYNC => BroadcastMode::Sync,
+            Proto::BroadcastMode::ASYNC => BroadcastMode::Async,
+        }
+    }
+}

rust/chains/tw_greenfield/src/context.rs

@@ -0,0 +1,23 @@
+// Copyright © 2017-2023 Trust Wallet.
+//
+// This file is part of Trust. The full Trust copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
+use crate::address::GreenfieldAddress;
+use crate::public_key::GreenfieldPublicKey;
+use tw_cosmos_sdk::context::CosmosContext;
+use tw_cosmos_sdk::hasher::keccak256_hasher::Keccak256Hasher;
+use tw_cosmos_sdk::private_key::secp256k1::Secp256PrivateKey;
+use tw_cosmos_sdk::signature::secp256k1::Secp256k1Signature;
+
+pub struct GreenfieldContext;
+
+impl CosmosContext for GreenfieldContext {
+    type Address = GreenfieldAddress;
+    /// Greenfield uses EIP712 message signing algorithm built upon `keccak256` hash.
+    type TxHasher = Keccak256Hasher;
+    type PrivateKey = Secp256PrivateKey;
+    type PublicKey = GreenfieldPublicKey;
+    type Signature = Secp256k1Signature;
+}