From 854e5ccb44c5eb533de27c6e3d35543280bde1ad Mon Sep 17 00:00:00 2001
From: Pavel Baykov <pbaykov@peerplays.com>
Date: Fri, 3 Jun 2022 09:17:10 -0300
Subject: [PATCH] ethereum_function_call_encoder

---
 CMakeLists.txt                                |  1 +
 libraries/fc                                  |  2 +-
 .../sidechain_net_handler_eth.hpp             |  9 ++-
 .../sidechain_net_handler_eth.cpp             | 58 ++++++++++++++++++-
 4 files changed, 66 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 695881be..1d4c2f1d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -51,6 +51,7 @@ if(CMAKE_SYSTEM_NAME MATCHES "Linux")
 	list(GET arg_list 0 output)
 	message("Ubuntu version is: ${output}")
 	add_definitions(-DPEERPLAYS_UBUNTU_VERSION=${output})
+
 endif()
 
 # function to help with cUrl
diff --git a/libraries/fc b/libraries/fc
index e7369949..c24b2df9 160000
--- a/libraries/fc
+++ b/libraries/fc
@@ -1 +1 @@
-Subproject commit e7369949bea26f3201d8442ba78286a88df74762
+Subproject commit c24b2df96d949f25ff85ca0aae5e17da111bde79
diff --git a/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/sidechain_net_handler_eth.hpp b/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/sidechain_net_handler_eth.hpp
index 95d333cd..505bc3a4 100644
--- a/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/sidechain_net_handler_eth.hpp
+++ b/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/sidechain_net_handler_eth.hpp
@@ -66,7 +66,6 @@ public:
       std::string label;
    };
 
-public:
    eth_rpc_client(const std::string &url, const std::string &user_name, const std::string &password, bool debug_rpc_calls);
 
    void start(std::string uri);
@@ -121,6 +120,14 @@ public:
    bool walletpassphrase(const std::string &passphrase, uint32_t timeout = 60);
 
 private:
+   class ethereum_function_call_encoder {
+	std::string encode_function_signature(const std::string& function_signature);
+	std::string encode_address(const std::string& addr);
+	std::string encode_uint256(const std::string& value);
+	std::string encode_uint8(uint8_t value);
+	std::string encode_bytes(const std::string& values);
+   };
+
    std::string geth_url;
    uint64_t t_id;
    std::string account_address;
diff --git a/libraries/plugins/peerplays_sidechain/sidechain_net_handler_eth.cpp b/libraries/plugins/peerplays_sidechain/sidechain_net_handler_eth.cpp
index 97540024..25464be8 100644
--- a/libraries/plugins/peerplays_sidechain/sidechain_net_handler_eth.cpp
+++ b/libraries/plugins/peerplays_sidechain/sidechain_net_handler_eth.cpp
@@ -20,9 +20,49 @@
 #include <graphene/utilities/key_conversion.hpp>
 
 #include <fc/io/json.hpp>
+extern "C" {
+#include <sha3.h>
+}
 
 namespace graphene { namespace peerplays_sidechain {
 // =============================================================================
+std::string eth_rpc_client::ethereum_function_call_encoder::encode_function_signature(const std::string& function_signature) {
+   sha3_context c;
+   uint8_t *hash;
+
+   sha3_Init256(static_cast<void*>(&c));
+   sha3_Update(&c, "abc", 3);
+   hash = (uint8_t*)sha3_Finalize(&c);
+
+// 'hash' points to a buffer inside 'c'
+// with the value of SHA3-256
+//
+     	return "";
+};
+
+std::string eth_rpc_client::ethereum_function_call_encoder::encode_address(const std::string& addr) {
+   FC_ASSERT(20 == addr.length());
+   std::string output = str(boost::format("%012u") % 0) + addr;
+   return output;
+}
+
+std::string eth_rpc_client::ethereum_function_call_encoder::encode_uint256(const std::string& value) {
+   FC_ASSERT(value.length() <= 64);
+   std::string output = std::string(64 - value.length(), '0') + value;
+   return output;   
+}
+
+std::string eth_rpc_client::ethereum_function_call_encoder::encode_uint8(uint8_t value) {
+    std::string output = str(boost::format("%02X") % value) + std::string(62, '0');
+    return output;
+}
+
+std::string eth_rpc_client::ethereum_function_call_encoder::encode_bytes(const std::string& values) {
+    size_t len = values.length();
+    std::string output = encode_uint256((boost::format("%x") % len).str()) + values + std::string(64 - len, '0');
+    return output;
+}
+
 
 eth_rpc_client::eth_rpc_client(const std::string &url, const std::string &user_name, const std::string &password, bool debug_rpc_calls) {
    geth_url = url;
@@ -983,9 +1023,23 @@ std::string sidechain_net_handler_eth::create_transaction() {
 }
 
 std::string sidechain_net_handler_eth::sign_transaction(const sidechain_transaction_object &sto) {
-   std::string tx_signature;// = write_transaction_signatures(sigs);
+/*
+   std::stringstream ss_trx(boost::algorithm::unhex(sto.transaction));
+   hive::signed_transaction htrx;
+   fc::raw::unpack(ss_trx, htrx, 1000);
+
+   std::string chain_id_str = node_rpc_client->get_chain_id();
+   const hive::chain_id_type chain_id(chain_id_str);
+
+   fc::optional<fc::ecc::private_key> privkey = graphene::utilities::wif_to_key(get_private_key(plugin.get_current_son_object().sidechain_public_keys.at(sidechain)));
+   signature_type st = htrx.sign(*privkey, chain_id);
+
+   std::stringstream ss_st;
+   fc::raw::pack(ss_st, st, 1000);
+   std::string st_str = boost::algorithm::hex(ss_st.str());
+*/
+   return "";//st_str;
 
-   return tx_signature;
 }
 
 std::string sidechain_net_handler_eth::send_transaction(const sidechain_transaction_object &sto) {