Common use of Agreement Protocol Clause in Contracts

Agreement Protocol. First we describe how PBFT achieves agreement on a unique order of requests within a single view. Figure 26.9 shows how the nodes come to an agreement on a sequence number for a client request. Informally, the protocol has these five steps: 1. The nodes receive a request and relay it to the primary. 2. The primary sends a pre-prepare-message to all backups, informing them that it wants to execute that request with the sequence number specified in the message. 3. Backups send prepare-messages to all nodes, informing them that they agree with that suggestion. 4. All nodes send commit-messages to all nodes, informing everyone that they have committed to execute the request with that sequence number. 5. They execute the request and inform the client.

Agreement Protocol. First we describe how PBFT achieves agreement on a unique order of requests within a single view. Figure 26.9 25.9 shows how the nodes come to an agreement on a sequence number for a client request. Informally, the protocol has these five steps: 1. The nodes receive a request and relay it to the primary. 2. The primary sends a pre-prepare-message to all backups, informing them that it wants to execute that request with the sequence number specified in the message. 3. Backups send prepare-messages to all nodes, informing them that they agree with that suggestion. 4. All nodes send commit-messages to all nodes, informing everyone that they have committed to execute the request with that sequence number. 5. They execute the request and inform the client.