Alipay (hangzhou) Information Technology Co., Ltd.

Advanced New Technologies Co., Ltd.

Alipay Information Technology Co., Ltd.

Xiaojun Liao

Fuxi Deng

Kang Li

A consensus method for a blockchain based on a Byzantine fault tolerance algorithm, includes: initiating, by a first consensus node of a consortium blockchain, a consensus proposal comprising a first proposal digest generated based on a first last block hash maintained by the first consensus node; in response to the consensus proposal, generating, by a second consensus node of the consortium blockchain, a second proposal digest based on a second last block hash maintained by the second consensus node; and not participating in, by the second consensus node, a consensus on the consensus proposal if it is detected that the first proposal digest does not match the second proposal digest.

Consensus method, apparatus, and system for blockchain based on byzantine fault tolerance algorithm

A transaction consensus processing method for a blockchain is provided. A target node that initiates a proposition performs compression processing on proposed transaction data based on a compression algorithm, and fragments the compressed transaction data into a number of data fragments based on an erasure code algorithm. The method includes: receiving a data fragment of the transaction data that is sent by the target node in a unicast mode, data fragments sent by the target node to nodes in the unicast mode being different; broadcasting the received data fragment to other nodes, and receiving data fragments of the transaction data that are broadcast by the other nodes; performing data recovery on the received data fragment based on an erasure code reconstruction algorithm, performing decompression processing on the recovered transaction data based on a decompression algorithm to obtain original content of the transaction data, and completing the consensus.

Transaction consensus processing method and apparatus for blockchain and electronic device

Methods, systems, and devices, including computer programs encoded on computer storage media, for payment are provided. One of the methods includes: sending a consensus proposal for at least one pending-consensus transaction in a transaction pool of the consensus master node to a target consensus backup node of the blockchain, wherein the consensus proposal comprises a transaction hash list, and the transaction hash list comprises a transaction hash of the at least one pending-consensus transaction; matching the transaction hash in the consensus proposal with transactions in a transaction pool of the target consensus backup node; in response to the transaction hash being matched, obtaining, from the transaction pool of the target consensus backup node, transaction information of the matched at least one pending-consensus transaction; and executing a process of the consensus proposal based on the transaction information.

Blockchain consensus method and device and electronic equipment

A blockchain consensus method includes receiving, by a second consensus node of a blockchain, a consensus proposal initiated by a first consensus node of the blockchain, wherein the consensus proposal comprises a first proposal digest, and the first proposal digest is based on a transaction set that needs to be proposed and a first newest block hash maintained by the first consensus node; generating, by the second consensus node of the blockchain in response to the consensus proposal, a second proposal digest based on a second newest block hash maintained by the second consensus node and the transaction set; determining, by the second consensus node, whether the first proposal digest matches the second proposal digest.

Byzantine fault tolerance algorithm-based blockchain consensus method, apparatus, and system

A blockchain consensus method includes: performing, by a target consensus node of a blockchain, a current round of consensus, to count consensus votes of N consensus proposals; traversing, by the target consensus node, a first set of consensus proposals, to perform the following steps: migrating consensus proposals that each receive greater than or equal to f+1 and less than 2f+1 identical consensus votes into a second set of consensus proposals; and migrating consensus proposals that each receive less than f+1 identical consensus votes into a third set of consensus proposals as opposition consensus opinions, wherein f is a number of fault tolerant consensus nodes of the blockchain.

Blockchain consensus method, node, and system based on honey badger byzantine fault tolerance consensus mechanism

This specification discloses a method and a system. The method includes: obtaining a Merkle root of one or more proposals initiated by one or more nodes associated with a blockchain; signing the Merkle root of the one or more proposals to obtain a digital signature of the one or more proposals; transmitting the digital signature of the one or more proposals to one or more nodes associated with the blockchain; receiving one or more digital signatures of the one or more proposals from one or more nodes associated with the blockchain respectively; determining that a quantity of the received one or more digital signatures is at least 2 f+1, wherein f is a maximum quantity of abnormal nodes permitted by the blockchain; and generating a proof of consensus for the one or more proposals based on the received one or more digital signatures.

Methods and systems for consensus in blockchains

Embodiments of this specification provide a consensus node changing method and apparatus based on a Honey Badger Byzantine Fault Tolerance (BFT) consensus mechanism. The method includes: when receiving a transaction for changing a blockchain's consensus node, executing, by a consensus node of the blockchain, the transaction to trigger a smart contract to update a consensus node configuration list of the blockchain, where the consensus node configuration list includes serial numbers allocated to consensus nodes based on a serial number allocation rule specified by the smart contract; associating, by the consensus node based on serial numbers of consensus nodes in the updated consensus node configuration list, another consensus node of the blockchain with at least two state machines configured in the consensus node.

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Hangzhou, China

Xiaojun Liao