Method and apparatus for generating random number in blockchain

A method for generating a random number in a blockchain, comprising:

• locally generating, by at least one blockchain node, a first random number and a first digest value of the first random number;
• respectively submitting, by the at least one blockchain node, the first digest value to a smart contract of the blockchain within a first preset duration;
• submitting, by the at least one blockchain node, the first random number to the smart contract within a second preset duration that is started after the first preset duration ends;
• verifying, by the smart contract, the received at least one first digest value and the first random number corresponding to the first digest value;
• generating a second random number based on a successfully verified first random number;
• and
• starting a service based on the second random number;
• wherein generating the second random number based on the successfully verified first random number comprises:
• determining, by the smart contract, from the at least one blockchain node, a blockchain node that submits the first random number at last;
• and calculating, according to a preset operation rule, a digest value of the blockchain node that submits the first random number at last, and the successfully verified first random number, so as to generate the second random number.

An electronic device for generating a random number in a blockchain, comprising:

• one or more processors;
• and
• a storage apparatus, configured to store one or more programs, wherein,
• when the one or more programs are executed by the one or more processors, the one or more processors implement following actions:
• locally generating, by a first node in the blockchain, a first random number and a first digest value of the first random number;
• submitting, by the first node, the first digest value to a smart contract;
• broadcasting, by the smart contract, a first service, so that at least one blockchain node in the blockchain submits participation information about the first service;
• determining, by smart contract, a second node from the at least one blockchain node based on the order of submission of participation information by the at least one blockchain node;
• when the first service ends, submitting, by the first node, the first random number to the smart contract;
• when the smart contract verifies that the first random number corresponds to the first digest value, generating a second random number based on a second digest value of the second node and the first random number;
• and
• starting a second service based on the second random number.

A non-transitory computer-readable storage medium, on which a computer program is stored, wherein when executed by a processor, the program implements following actions:

• locally generating, by a first node in the blockchain, a first random number and a first digest value of the first random number;
• submitting, by the first node, the first digest value to a smart contract;
• broadcasting, by the smart contract, a first service, so that at least one blockchain node in the blockchain submits participation information about the first service;
• determining, by smart contract, a second node from the at least one blockchain node based on the order of submission of participation information by the at least one blockchain node;
• when the first service ends, submitting, by the first node, the first random number to the smart contract;
• when the smart contract verifies that the first random number corresponds to the first digest value, generating a second random number based on a second digest value of the second node and the first random number;
• and
• starting a second service based on the second random number.

An electronic device for generating a random number in a blockchain, comprising:

• one or more processors;
• and
• a storage apparatus, configured to store one or more programs, wherein,
• when the one or more programs are executed by the one or more processors, the one or more processors implement following actions:
• at least one blockchain node locally generating a first random number and a first digest value of the first random number;
• the at least one blockchain node respectively submitting the first digest value to a smart contract of the blockchain within a first preset duration;
• the at least one blockchain node submitting the first random number to the smart contract within a second preset duration that is started after the first preset duration ends;
• the smart contract verifying the received at least one first digest value and the first random number corresponding to the first digest value;
• generating a second random number based on a successfully verified first random number;
• and
• starting a service based on the second random number;
• wherein generating the second random number based on the successfully verified first random number comprises:
• determining, by the smart contract, from the at least one blockchain node, a blockchain node that submits the first random number at last;
• and calculating, according to a preset operation rule, a digest value of the blockchain node that submits the first random number at last, and the successfully verified first random number, so as to generate the second random number.

A non-transitory computer-readable storage medium, on which a computer program is stored, wherein when executed by a processor, the program implements following actions:

• at least one blockchain node locally generating a first random number and a first digest value of the first random number;
• the at least one blockchain node respectively submitting the first digest value to a smart contract of the blockchain within a first preset duration;
• the at least one blockchain node submitting the first random number to the smart contract within a second preset duration that is started after the first preset duration ends;
• the smart contract verifying the received at least one first digest value and the first random number corresponding to the first digest value;
• generating a second random number based on a successfully verified first random number;
• and
• starting a service based on the second random number;
• wherein generating the second random number based on the successfully verified first random number comprises:
• determining, by the smart contract, from the at least one blockchain node, a blockchain node that submits the first random number at last;
• and calculating, according to a preset operation rule, a digest value of the blockchain node that submits the first random number at last, and the successfully verified first random number, so as to generate the second random number.