Blockchain-based transaction verification

A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

• receiving, by a blockchain system of a blockchain, a transaction message for transaction data to be verified, wherein, the transaction message comprises transaction information and a plurality of digital signatures associated with a plurality of verifiers, wherein each digital signature of the plurality of digital signatures is generated by a respective verifier using one of a plurality of private keys of the respective verifier, wherein each verifier private key is associated with a respective verifier public key, and wherein each verifier public key of each verifier comprises a respective weight and the respective weight of each public key of the verifier is different from the respective weight of each other public key of the verifier;
• verifying each digital signature in the transaction message using a corresponding verifier public key to provide a plurality of verified digital signatures;
• obtaining, for each verified digital signature of the plurality of verified digital signatures, a weight of the corresponding verifier public key used to verify the digital signature, thereby providing a plurality of determined weights;
• obtaining a sum of the plurality of determined weights;
• and
• determining that the transaction data is verified successfully based on the sum of the plurality of determined weights exceeding a pre-determined value.

A computer-implemented system, comprising:

• one or more computers;
• and
• one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, perform operations comprising:
• receiving, by a blockchain system of a blockchain, a transaction message for transaction data to be verified, wherein, the transaction message comprises transaction information and a plurality of digital signatures associated with a plurality of verifiers, wherein each digital signature of the plurality of digital signatures is generated by a respective verifier using one of a plurality of private keys of the respective verifier, wherein each verifier is associated with a respective verifier public key, and wherein each verifier public key of each verifier comprises a respective weight and the respective weight of each public key of the verifier is different from the respective weight of each other public key of the verifier;
• verifying each digital signature in the transaction message using a corresponding verifier public key to provide a plurality of verified digital signatures;
• obtaining, for each verified digital signature of the plurality of verified digital signatures, a weight of the corresponding verifier public key used to verify the digital signature, thereby providing a plurality of determined weights;
• obtaining a sum of the plurality of determined weights;
• and
• determining that the transaction data is verified successfully based on the sum of the plurality of determined weights exceeding a pre-determined value.