DAPP系统是基于区块-链技术的，区块技术在DAPP中具有广泛的应用。区块-技术可以帮助DAPP系统**者构建去中心化的应用，实现应用的可信化。此外，区块-链技术还可以为DAPP系统**者提供区块I8I系统流程**259I合约技术3365过程钱包、智能合约、数字资产等功能。
DAPP系统**具有许多优势,但也存在一些问题。相比之下,传统应用系统**显得更加成熟。总之,DAPP系统**是一门有前途的技术。
// 开启**流程后，进入这里，需要一个交易输出，及Coinbase交易要将**奖励给矿工，需要锁定脚本
static UniValue generatetoaddress(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 2 || request.params.size() > 3)
throw std::runtime_error(
RPCHelpMan{"generatetoaddress",
"\nMine blocks immediately to a specified address (before the RPC call returns)\n",
{
{"nblocks", RPCArg::Type::NUM, RPCArg::Optional::NO, "How many blocks are generated immediately."}, //设置准备挖多少个区块
{"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The address to send the newly generated bitcoin to."}, / "1000000", "How many iterations to try."},
},
RPCResult{
"[ blockhashes ] (array) hashes of blocks generated\n"
RPCExamples{
"\nGenerate 11 blocks to myaddress\n"
+ HelpExampleCli("generatetoaddress", "11 \"myaddress\"")
+ "If you are running the bitcoin core wallet, you can get a new address to send the newly generated bitcoin to with:\n"
+ HelpExampleCli("getnewaddress", "")
}.ToString());
int nGenerate = request.params[0].get_int();
uint64_t nMaxTries = 1000000;
if (!request.params[2].isNull()) {
nMaxTries = request.params[2].get_int();
}
CTxDestination destination = DecodeDestination(request.params[1].get_str());
if (!IsValidDestination(destination)) {
throw JSonRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Error: Invalid address");
}
Cscript coinbase_script = GetscriptForDestination(destination); //用于给矿工奖励的锁定脚本
return generateBlocks(coinbase_script, nGenerate, nMaxTries); //产生新块，竞争记账权
}
static UniValue generateBlocks(const Cscript& coinbase_script, int nGenerate, uint64_t nMaxTries)
{
static const int nInnerLoopCount = 0x10000;
int nHeightEnd = 0;
int nHeight = 0;
{ // Don't keep cs_main locked
LOCK(cs_main);
nHeight = ::ChainActive().Height();
nHeightEnd = nHeight+nGenerate;
}
unsigned int nExtraNonce = 0;
UniValue blockHashes(UniValue::VARR);
while (nHeight < nHeightEnd && !ShutdownRequested()) //如果不到指定区块高度或者没有停止**请求就一直**
{
std::unique_ptr
if (!pblocktemplate.get())
throw JSonRPCError(RPC_INTERNAL_ERROR, "Couldn't create new block");
CBlock *pblock = &pblocktemplate->block;
{
LOCK(cs_main);
IncrementExtraNonce(pblock, ::ChainActive().Tip(), nExtraNonce); //默克尔根哈希是在这里面计算并赋值的。
}
//不断改变nNonce值，计算难题
while (nMaxTries > 0 && pblock->nNonce < nInnerLoopCount && !CheckProofOfWork(pblock->GetHash(), pblock->nBits, Params().GetConsensus())) {
++pblock->nNonce;
--nMaxTries;
}
if (nMaxTries == 0) {
break;
}
if (pblock->nNonce == nInnerLoopCount) {
continue;
}
std::shared_ptr
if (!ProcessNewBlock(Params(), shared_pblock, true, nullptr))
throw JSonRPCError(RPC_INTERNAL_ERROR, "ProcessNewBlock, block not accepted");
++nHeight;
blockHashes.push_back(pblock->GetHash().GetHex());
}
return blockHashes;
}
DAPP系统是一种分布式应用程序，它使用***技术来保证数据的安全性和透明度。DAPP系统通常包括三个部分：应用程序、***网络和智能合约。DAPP系统的**流程一般包括以下几个步骤：1.需求分析：确定需要**DAPP系统的目标和需求；
2.选择***技术：根据需求选择合适的***技术；
3.架构设计：设计DAPP系统的架构；
4.**实现：根据设计实现DAPP系统；
5.测试部署：对DAPP系统进行测试部署；
6.维护运营：对DAPP系统进行维护运营。