1. 以轉(zhuǎn)賬為例，說明EOS消息處理流程

step1. cleos客戶端發(fā)起轉(zhuǎn)賬命令，
step2. 解析transfer命令，通過create_transfer函數(shù)將交易發(fā)送者、交易接收者、token數(shù)量等信息封裝成mutable_variant_object對象
step3. 調(diào)用send_action函數(shù)，將交易信息發(fā)送到服務(wù)器端

main→send_actions→push_actions→push_transaction→call→do_http_call→do_connect(httpc.cpp)→do_txrx

./cleos transfer sender recipient amount memo

programs/cleos/main.cpp

main() { … send_actions({create_transfer(sender, recipient, amount, memo)}); … }void send_actions {auto result = push_actions( move(actions), extra_kcpu, compression);… }fc::variant push_actions {signed_transaction trx;trx.actions = std::forward<decltype(actions)>(actions);return push_transaction(trx, extra_kcpu, compression); }fc::variant push_transaction{trx.set_reference_block(ref_block_id);// 發(fā)送 ”/V1/chain/push_transaction” URL地址到服務(wù)器端if (!tx_dont_broadcast) {return call(push_txn_func, packed_transaction(trx, compression));} }fc::variant call{try {return eosio::client::http::do_http_call( url, path, fc::variant(v) );} }fc::variant do_http_call {// 將請求的URL封裝成http包request_stream << "POST " << path_prefix + path << " HTTP/1.0\r\n";request_stream << "Host: " << server << "\r\n";request_stream << "content-length: " << postjson.size() << "\r\n";request_stream << "Accept: */*\r\n";request_stream << "Connection: close\r\n\r\n";request_stream << postjson;// 和服務(wù)器建立連接do_connect(socket, server, port);// 發(fā)送http報文，并獲取返回結(jié)果re = do_txrx(socket, request, status_code); }

總結(jié)

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