(1)官方网站
(2)Github
(2)开发者中心
从源码可知WICC底层基于bitcoin,上层是运行Lua虚拟机,智能合约跟以太坊、EOS类似,特殊是由Lua开发
-- cfad02ea148ca0a763baaf67735c010023bb75c88509f6a94e87921a54182f02 --hash值
local opened_hash_table={0xcf,0xad,0x02,0xea,0x14,0x8c,0xa0,0xa7,0x63,0xba,0xaf,0x67,0x73,0x5c,0x01,0x00,0x23,0xbb,0x75,0xc8,0x85,0x09,0xf6,0xa9,0x4e,0x87,0x92,0x1a,0x54,0x18,0x2f,0x02}
local confirm_height = mylib.GetTxConFirmHeight(Unpack(opened_hash_table))
print("confirm_height=",confirm_height)
confirm_height= nil
c++功底还不够深,看不出啥问题
static int ExGetTxConfirmHeightFunc(lua_State *L) {
vector > > retdata;
if(!GetArray(L,retdata) ||retdata.size() != 1|| retdata.at(0).get()->size() != 32)
{
return RetFalse("ExGetTxConfirmHeightFunc para err1");
}
uint256 hash1(*retdata.at(0));
//LogPrint("vm","ExGetTxContractsFunc1:%s",hash1.GetHex().c_str());
CVmRunEvn* pVmRunEvn = GetVmRunEvn(L);
if(NULL == pVmRunEvn)
{
return RetFalse("pVmRunEvn is NULL");
}
int nHeight = GetTxConfirmHeight(hash1, *pVmRunEvn->GetScriptDB());
if(-1 == nHeight)
{
return RetFalse("ExGetTxConfirmHeightFunc para err2");
}
else{
if(lua_checkstack(L,sizeof(lua_Number))){
lua_pushnumber(L,(lua_Number)nHeight);
return 1 ;
}else{
LogPrint("vm","%s\r\n", "ExGetCurRunEnvHeightFunc stack overflow");
return 0;
}
}
}
功夫不负有心人,GetTxContracts接口也是入参为hash,写测试代码发现此接口是正常的,同样的入参,一个正常一个异常,对比一下函数实现
static int ExGetTxContractsFunc(lua_State *L) {
vector > > retdata;
if(!GetArray(L,retdata) ||retdata.size() != 1 || retdata.at(0).get()->size() != 32)
{
return RetFalse(string(__FUNCTION__)+"para err !");
}
CVmRunEvn* pVmRunEvn = GetVmRunEvn(L);
if(NULL == pVmRunEvn)
{
return RetFalse("pVmRunEvn is NULL");
}
vector vec_hash(retdata.at(0).get()->rbegin(), retdata.at(0).get()->rend());
CDataStream tep1(vec_hash, SER_DISK, CLIENT_VERSION);
uint256 hash1;
tep1 >>hash1;
std::shared_ptr pBaseTx;
if (GetTransaction(pBaseTx, hash1, *pVmRunEvn->GetScriptDB(), false)) {
CTransaction *tx = static_cast(pBaseTx.get());
return RetRstToLua(L, tx->vContract);
}
return 0;
}
由以下图片可见,ExGetTxConfirmHeightFunc 函数取入参hash直接进行操作,ExGetTxContractsFunc函数对入参hash进行倒序后再操作,加打印信息调试确实两者的hash有倒序的区别
confirm_height= 639083.0
注意:链上虚拟机版本问题,输出的高度值为Number类型 :123456.0,开发者使用此值的时候需要注意
由于区块链的特性是去中心化的,WICC共识机制为DPOS,目前为11个超级节点随机轮流记账出块,本地节点通过以上修改之后合约可以正常获得数据,但是由于超级节点没有同步更新
所以如果只修改本地节点,调用修复后的接口后,区块同步会停止
原因未找到,有进展后续会更新…