Method for controlling other systems based on single-point execution contract

A method for controlling other systems based on a single-point execution contract, comprising the following steps:

• step A, when a contract developer writes a single-point execution contract code, integrating command needing transparent transmission into the contract code;
• step B, executing, by a virtual machine, the contract code, calling a transparent-transmission channel command input interface when the execution proceeds to a row where the command needing transparent transmission is located, and transmitting the command to a blockchain node;
• step C, enabling the blockchain node not to process the command, and calling a secondary development service package interface through the transparent-transmission command to transmit downwards;
• step D, operating, by the code in a secondary development service package, other systems based on business processing flow defined by the contract developer to accomplish business processing, and then executing the next step;
• step E, after execution of the contract, creating return transaction executed by the contract and broadcasting the return transaction to the whole network;
• step F, if execution of the step E is abnormal, terminating this contract calling execution, listing the contract calling transaction into an abnormal list without any return transaction, and manually triggering the execution again after faults are eliminated, and
• step G, after the package of the contract transaction is confirmed, receiving, by secondary development service package program, related subscribed transaction confirmation information, and starting business flow processing after the transaction is confirmed.