From 3c6904c9aa2e6cf0a5806cd108262f48fb611b39 Mon Sep 17 00:00:00 2001
From: Sean <darcys22@gmail.com>
Date: Wed, 22 Nov 2023 08:44:42 +1100
Subject: [PATCH] new function to get a deployed contract address (#4)

---
 include/ethyl/provider.hpp |  1 +
 src/provider.cpp           | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/include/ethyl/provider.hpp b/include/ethyl/provider.hpp
index 7029f32..d871b22 100644
--- a/include/ethyl/provider.hpp
+++ b/include/ethyl/provider.hpp
@@ -52,6 +52,7 @@ class Provider {
     bool transactionSuccessful(const std::string& txHash, int64_t timeout = 320000);
     uint64_t gasUsed(const std::string& txHash, int64_t timeout = 320000);
     mpz_class getBalance(const std::string& address);
+    std::string getContractDeployedInLatestBlock();
 
     FeeData getFeeData();
 
diff --git a/src/provider.cpp b/src/provider.cpp
index 4499cda..a5b1b93 100644
--- a/src/provider.cpp
+++ b/src/provider.cpp
@@ -322,6 +322,25 @@ mpz_class Provider::getBalance(const std::string& address) {
     }
 }
 
+std::string Provider::getContractDeployedInLatestBlock() {
+    nlohmann::json params = nlohmann::json::array();
+    params.push_back("latest");
+    params.push_back(true);
+    auto blockResponse = makeJsonRpcRequest("eth_getBlockByNumber", params);
+    if (blockResponse.status_code != 200)
+        throw std::runtime_error("Failed to get the latest block");
+    nlohmann::json blockJson = nlohmann::json::parse(blockResponse.text);
+
+    for (const auto& tx : blockJson["result"]["transactions"]) {
+        std::optional<nlohmann::json> transactionReceipt = getTransactionReceipt(tx["hash"].get<std::string>());
+        if (transactionReceipt.has_value())
+            return transactionReceipt->at("contractAddress").get<std::string>();
+    }
+
+    throw std::runtime_error("No contracts deployed in latest block");
+}
+
+
 FeeData Provider::getFeeData() {
     // Get latest block
     nlohmann::json params = nlohmann::json::array();