feat: add bool abi decoding

src/abi/abiDecode.cpp

@@ -131,4 +131,10 @@ iotex::ResultCode iotex::abi::decode::decodeAddress(const char data[64], char ou
 	memcpy(out, pStart, ETH_ADDRESS_C_STRING_SIZE - 1);
 
 	return ResultCode::SUCCESS;
+}
+
+bool iotex::abi::decode::decodeBool(const char data[64])
+{
+	// Bool is encoded as uint8. With the value of 1 for true and the value of 0 for false.
+	return data[63] == '1';
 }

src/abi/abiDecode.h

@@ -91,6 +91,7 @@ iotex::ResultCode decodeUintGeneric(const char* pData, size_t uintSize, uint64_t
 iotex::ResultCode decodeIntGeneric(const char* pData, size_t uintSize, int64_t* out);
 iotex::ResultCode decodeString(const char* pData, size_t size, IotexString& out);
 iotex::ResultCode decodeAddress(const char data[64], char out[ETH_ADDRESS_C_STRING_SIZE]);
+bool decodeBool(const char data[64]);
 
 template<uint8_t size>
 ResultCode decodeUint(const char* pData, size_t dataSize, uint64_t* out)

tests/CMakeLists.txt

@@ -44,6 +44,7 @@ set (IOTEX_UNIT_TESTS_SOURCES
     src/abi/decode/abiDecodeIntTests.cpp
     src/abi/decode/abiDecodeStringTests.cpp
     src/abi/decode/abiDecodeAddressTests.cpp
+    src/abi/decode/abiDecodeBoolTests.cpp
     src/contract/contractTests.cpp
     src/contract/xrc20ContractTests.cpp
     src/account/accountTests_Execution.cpp

tests/src/abi/decode/abiDecodeBoolTests.cpp

@@ -0,0 +1,32 @@
+#include <gtest/gtest.h>
+#include <gmock/gmock.h>
+
+#include "abi/abiDecode.h"
+#include "contract/contract.h"
+#include "signer/signer.h"
+
+using namespace std;
+using namespace testing;
+using namespace iotex;
+using namespace iotex::abi::decode;
+
+class AbiDecodeBoolTests : public Test
+{
+    void SetUp() override {}
+
+    void TearDown() override {}
+};
+
+TEST_F(AbiDecodeBoolTests, DecodesFalse)
+{
+    const char encoded[] = "0000000000000000000000000000000000000000000000000000000000000000";
+    bool decoded = decodeBool(encoded);
+    ASSERT_EQ(false, decoded);
+}
+
+TEST_F(AbiDecodeBoolTests, DecodesTrue)
+{
+    const char encoded[] = "0000000000000000000000000000000000000000000000000000000000000001";
+    bool decoded = decodeBool(encoded);
+    ASSERT_EQ(true, decoded);
+}