Problem: Missing examples of using the cpp sdk (fix cronos-labs#103)

Solution:
- Add examples.

demo/Makefile

@@ -65,6 +65,16 @@ x86_64_build: prepare_x86_64 easywsclient.o.x86_64
 		-std=c++14 \
 		$(FLAGS)
 
+examples:
+	g++ -o new_wallet new_wallet.cc lib/libplay_cpp_sdk.a -std=c++14 $(FLAGS)
+	g++ -o restore_wallet restore_wallet.cc lib/libplay_cpp_sdk.a -std=c++14 $(FLAGS)
+	g++ -o get_erc20_transfer_history_blocking get_erc20_transfer_history_blocking.cc lib/libplay_cpp_sdk.a -std=c++14 $(FLAGS)
+	g++ -o get_erc721_transfer_history_blocking get_erc721_transfer_history_blocking.cc lib/libplay_cpp_sdk.a -std=c++14 $(FLAGS)
+	./new_wallet
+	./restore_wallet
+	. .env && ./get_erc20_transfer_history_blocking
+	. .env && ./get_erc721_transfer_history_blocking
+
 run_static:
 	. ./.env && ./demostatic
 

demo/get_erc20_transfer_history_blocking.cc

@@ -0,0 +1,60 @@
+#include "include/extra-cpp-bindings/src/lib.rs.h"
+#include "include/rust/cxx.h"
+#include <iostream>
+using namespace com::crypto::game_sdk;
+using namespace rust;
+using namespace std;
+
+// Read CronoScan api key in env
+const String CRONOSCAN_API_KEY = getenv("CRONOSCAN_API_KEY");
+
+int main(int argc, char *argv[]) {
+  // Get a list of "CRC20 - Token Transfer Events" by Address
+  // Returns up to a maximum of the last 10000 transactions only
+  // https://cronoscan.com/tokentxns?a=0xa9b34a4b568e640d5e5d1e6e13101025e1262864
+  Vec<RawTxDetail> erc20_txs = get_erc20_transfer_history_blocking(
+      "0xa9b34a4b568e640d5e5d1e6e13101025e1262864", "", QueryOption::ByAddress,
+      CRONOSCAN_API_KEY);
+
+  for (Vec<RawTxDetail>::iterator ptr = erc20_txs.begin();
+       ptr < erc20_txs.end(); ptr++) {
+    cout << "hash: " << ptr->hash << " ";
+    cout << "to: " << ptr->to_address << " ";
+    cout << "from: " << ptr->from_address << " ";
+    cout << "value:" << ptr->value << " ";
+    cout << "block_no: " << ptr->block_no << " ";
+    cout << "timestamp: " << ptr->timestamp << " ";
+    cout << "contract: " << ptr->contract_address << " " << endl;
+  }
+
+  cout << "A total of " << erc20_txs.size() << " transactions" << endl;
+
+  // Get a list of "CRC20 - Token Transfer Events" by ByAddressAndContract
+  // Returns up to a maximum of the last 10000 transactions only
+  // https://cronoscan.com/token/0x2d03bece6747adc00e1a131bba1469c15fd11e03?a=0xa9b34a4b568e640d5e5d1e6e13101025e1262864
+  erc20_txs = get_erc20_transfer_history_blocking(
+      "0xa9b34a4b568e640d5e5d1e6e13101025e1262864",
+      "0x2D03bECE6747ADC00E1a131BBA1469C15fD11e03",
+      QueryOption::ByAddressAndContract, CRONOSCAN_API_KEY);
+
+  for (Vec<RawTxDetail>::iterator ptr = erc20_txs.begin();
+       ptr < erc20_txs.end(); ptr++) {
+    cout << "hash: " << ptr->hash << " ";
+    cout << "to: " << ptr->to_address << " ";
+    cout << "from: " << ptr->from_address << " ";
+    cout << "value:" << ptr->value << " ";
+    cout << "block_no: " << ptr->block_no << " ";
+    cout << "timestamp: " << ptr->timestamp << " ";
+    cout << "contract: " << ptr->contract_address << " " << endl;
+  }
+  cout << "A total of " << erc20_txs.size() << " transactions" << endl;
+
+  // Get a list of "CRC20 - Token Transfer Events" by ByContract
+  // Returns up to a maximum of the last 10000 transactions only
+  erc20_txs = get_erc20_transfer_history_blocking(
+      "", "0x66e428c3f67a68878562e79A0234c1F83c208770", QueryOption::ByContract,
+      CRONOSCAN_API_KEY);
+
+  cout << "A total of " << erc20_txs.size() << " transactions" << endl;
+  return 0;
+}

demo/get_erc721_transfer_history_blocking.cc

@@ -0,0 +1,71 @@
+#include "include/extra-cpp-bindings/src/lib.rs.h"
+#include "include/rust/cxx.h"
+#include <iostream>
+using namespace com::crypto::game_sdk;
+using namespace rust;
+using namespace std;
+
+// Read CronoScan api key in env
+const String CRONOSCAN_API_KEY = getenv("CRONOSCAN_API_KEY");
+
+int main(int argc, char *argv[]) {
+  // Get a list of "ERC721 - Token Transfer Events" by Address
+  // Returns up to a maximum of the last 10000 transactions only
+  // https://cronoscan.com/tokentxns-nft?a=0x668f126b87936df4f9a98f18c44eb73868fffea0
+  Vec<RawTxDetail> erc721_txs = get_erc721_transfer_history_blocking(
+      "0x668f126b87936df4f9a98f18c44eb73868fffea0", "", QueryOption::ByAddress,
+      CRONOSCAN_API_KEY);
+
+  for (Vec<RawTxDetail>::iterator ptr = erc721_txs.begin();
+       ptr < erc721_txs.end(); ptr++) {
+    cout << "hash: " << ptr->hash << " ";
+    cout << "to: " << ptr->to_address << " ";
+    cout << "from: " << ptr->from_address << " ";
+    cout << "TokenID:" << ptr->value << " ";
+    cout << "block_no: " << ptr->block_no << " ";
+    cout << "timestamp: " << ptr->timestamp << " ";
+    cout << "contract: " << ptr->contract_address << " " << endl;
+  }
+
+  cout << "A total of " << erc721_txs.size() << " transactions" << endl;
+
+  // Get a list of "ERC721 - Token Transfer Events" ByAddressAndContract
+  // Returns up to a maximum of the last 10000 transactions only
+  // https://cronoscan.com/token/0x562f021423d75a1636db5be1c4d99bc005ccebfe?a=0x668f126b87936df4f9a98f18c44eb73868fffea0
+  erc721_txs = get_erc721_transfer_history_blocking(
+      "0x668f126b87936df4f9a98f18c44eb73868fffea0",
+      "0x562F021423D75A1636DB5bE1C4D99Bc005ccebFe",
+      QueryOption::ByAddressAndContract, CRONOSCAN_API_KEY);
+
+  for (Vec<RawTxDetail>::iterator ptr = erc721_txs.begin();
+       ptr < erc721_txs.end(); ptr++) {
+    cout << "hash: " << ptr->hash << " ";
+    cout << "to: " << ptr->to_address << " ";
+    cout << "from: " << ptr->from_address << " ";
+    cout << "TokenID:" << ptr->value << " ";
+    cout << "block_no: " << ptr->block_no << " ";
+    cout << "timestamp: " << ptr->timestamp << " ";
+    cout << "contract: " << ptr->contract_address << " " << endl;
+  }
+  cout << "A total of " << erc721_txs.size() << " transactions" << endl;
+
+  // Get a list of "ERC721 - Token Transfer Events" ByContract
+  // Returns up to a maximum of the last 10000 transactions only
+  // https://cronoscan.com/token/0x18b73d1f9e2d97057dec3f8d6ea9e30fcadb54d7
+  erc721_txs = get_erc721_transfer_history_blocking(
+      "", "0x18b73D1f9e2d97057deC3f8D6ea9e30FCADB54D7", QueryOption::ByContract,
+      CRONOSCAN_API_KEY);
+  for (Vec<RawTxDetail>::iterator ptr = erc721_txs.begin();
+       ptr < erc721_txs.end(); ptr++) {
+    cout << "hash: " << ptr->hash << " ";
+    cout << "to: " << ptr->to_address << " ";
+    cout << "from: " << ptr->from_address << " ";
+    cout << "TokenID:" << ptr->value << " ";
+    cout << "block_no: " << ptr->block_no << " ";
+    cout << "timestamp: " << ptr->timestamp << " ";
+    cout << "contract: " << ptr->contract_address << " " << endl;
+  }
+
+  cout << "A total of " << erc721_txs.size() << " transactions" << endl;
+  return 0;
+}

demo/new_wallet.cc

@@ -0,0 +1,14 @@
+#include "include/defi-wallet-core-cpp/src/lib.rs.h"
+#include "include/rust/cxx.h"
+#include <iostream>
+using namespace org::defi_wallet_core;
+using namespace std;
+
+int main(int argc, char *argv[]) {
+  auto wallet = new_wallet("", MnemonicWordCount::TwentyFour);
+  cout << wallet->get_default_address(CoinType::CronosMainnet) << endl;
+  cout << wallet->get_address(CoinType::CronosMainnet, 0) << endl;
+  cout << wallet->get_eth_address(0) << endl;
+  auto private_key = wallet->get_key("m/44'/60/0'/0/0");
+  return 0;
+}

demo/restore_wallet.cc

@@ -0,0 +1,14 @@
+#include "include/defi-wallet-core-cpp/src/lib.rs.h"
+#include "include/rust/cxx.h"
+#include <iostream>
+using namespace org::defi_wallet_core;
+using namespace std;
+
+int main(int argc, char *argv[]) {
+    auto wallet = restore_wallet("shed crumble dismiss loyal latin million oblige gesture shrug still oxygen custom remove ribbon disorder palace addict again blanket sad flock consider obey popular", "");
+    cout << wallet->get_default_address(CoinType::CronosMainnet) << endl;
+    cout << wallet->get_address(CoinType::CronosMainnet, 0) << endl;
+    cout << wallet->get_eth_address(0) << endl;
+    auto private_key = wallet->get_key("m/44'/60/0'/0/0");
+    return 0;
+}