has_contract() : Determine whether a account deploied contract

contracts/eosiolib/transaction.h

@@ -108,6 +108,13 @@ extern "C" {
     */
    void get_action_sequence(uint64_t* seq);
 
+    /**
+    * Get the code_hash of the account
+    * @param name : account name
+    * @return : Return has code
+    */
+    bool has_contract( account_name name);
+
    /**
     * Get the producer's signature for the action
     * @param sig : Memory buffer

libraries/chain/wasm_interface.cpp

@@ -1406,6 +1406,12 @@ class context_free_transaction_api : public context_aware_api {
            seq = context.global_action_sequence;
       }
 
+      bool has_contract(account_name name){
+          const auto accnt  = context.db.find<account_object,by_name>( name );
+          EOS_ASSERT( accnt != nullptr, action_validate_exception, "account '${account}' does not exist", ("account", name) );
+          return accnt->code.size() > 0;
+      }
+
       int expiration() {
         return context.trx_context.trx.expiration.sec_since_epoch();
       }
@@ -1946,6 +1952,7 @@ REGISTER_INTRINSICS(context_free_transaction_api,
    (transaction_size,       int()                    )
    (get_transaction_id,     void(int)                )
    (get_action_sequence,    void(int)                )
+   (has_contract,           int(int64_t)             )
    (expiration,             int()                    )
    (tapos_block_prefix,     int()                    )
    (tapos_block_num,        int()                    )

unittests/actiondemo/actiondemo.abi

@@ -1,5 +1,5 @@
 {
-  "____comment": "This file was generated by eosio-abigen. DO NOT EDIT - 2018-11-17T13:26:02",
+  "____comment": "This file was generated by eosio-abigen. DO NOT EDIT - 2018-12-18T07:34:45",
   "version": "eosio::abi/1.0",
   "types": [],
   "structs": [{
@@ -45,6 +45,22 @@
       "name": "clear",
       "base": "",
       "fields": []
+    },{
+      "name": "args_name",
+      "base": "",
+      "fields": [{
+          "name": "name",
+          "type": "name"
+        }
+      ]
+    },{
+      "name": "printcode",
+      "base": "",
+      "fields": [{
+          "name": "t",
+          "type": "args_name"
+        }
+      ]
     },{
       "name": "args_inline",
       "base": "",
@@ -74,6 +90,10 @@
       "name": "clear",
       "type": "clear",
       "ricardian_contract": ""
+    },{
+      "name": "printcode",
+      "type": "printcode",
+      "ricardian_contract": ""
     },{
       "name": "inlineact",
       "type": "inlineact",

unittests/actiondemo/actiondemo.cpp

@@ -1,7 +1,7 @@
 #include "actiondemo.hpp"
 #include "../../contracts/eosiolib/print.hpp"
 #include "../../contracts/eosiolib/types.hpp"
-#include "../../contracts/eosiolib/transaction.hpp"
+#include "../../contracts/eosiolib/transaction.h"
 
 namespace spaceaction {
 
@@ -19,6 +19,9 @@ namespace spaceaction {
             case N(clear):
                 clear();
                 return;
+            case N(printcode):
+                printcode(unpack_action_data<args_name>());
+                return;
         }
     }
 
@@ -33,6 +36,8 @@ namespace spaceaction {
         }
     }
 
+
+
     std::string to_hex( const char* d, uint32_t s )
     {
         std::string r;
@@ -43,6 +48,11 @@ namespace spaceaction {
         return r;
     }
 
+    void actiondemo::printcode(const args_name& t){
+        bool r = has_contract(t.name);
+        print_f("% code hash:%", name{t.name}.to_string(),r);
+    }
+
     void actiondemo::generate(const args& t){
         for (int i = 0; i < t.loop; ++i) {
             transaction_id_type txid;

unittests/actiondemo/actiondemo.hpp

@@ -22,6 +22,12 @@ namespace spaceaction {
         //@abi action
         void clear();
 
+        struct args_name{
+            account_name name;
+        };
+        //@abi action
+        void printcode(const args_name& t);
+
 
         struct args_inline{
             account_name payer;

unittests/actiondemo/test.py

@@ -159,6 +159,13 @@ def stepGenerate():
     run(args.cleos + 'get table %s %s seedobjs'  %(args.contract2, args.contract2) )
     print ("sleep 5")
 
+def stepGetCode():
+    print ("===========================    set stepGetCode   ===========================" )
+    run(args.cleos + 'push action %s printcode \'[{"name":"eosio.token"}]\' -p %s ' %(args.contract,args.contract))
+    run(args.cleos + 'push action %s printcode \'[{"name":"eosio"}]\' -p %s ' %(args.contract,args.contract))
+    run(args.cleos + 'push action %s printcode \'[{"name":"eosio.ram"}]\' -p %s ' %(args.contract,args.contract))
+    print ("sleep 5")
+
 
 parser = argparse.ArgumentParser()
 
@@ -169,6 +176,7 @@ def stepGenerate():
     ('i', 'init',      stepInitCaee,                      True,         "stepInitCaee"),
     ('c', 'clear',      stepClear,                      True,         "stepInitCaee"),
     ('g', 'generate',      stepGenerate,                True,         "stepInitCaee"),
+    ('d', 'getcode',      stepGetCode,                True,         "stepGetCode"),
 ]
 
 parser.add_argument('--public-key', metavar='', help="EOSIO Public Key", default='EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV', dest="public_key")