Messaging Layer

The following graph demonstrates how the messaging layer of Bool processes a cross-chain message:

• The Monitor server captures the cross-chain message emitted by the Messenger contract on the source chain and submits the message onto the Bool chain.

• DHCs in Bool Network fetch the cross-chain message from the Bool chain and decodes the packed message following a pre-defined standard. More specifically, a valid cross-chain message must include two vital destination information: Chain ID and the identification of Anchor, such as address.

• The only committee controlling the destination Anchor will reorganize the cross-chain message based on the standard of the destination.

• The committee members independently verify the finality of the message on the source chain and sign the message based on the Threshold Signature Scheme (TSS).

• A signature is generated which can be verified on-chain to prove the validity of the corresponding message.

• The External Relayers system will synthesize (message, signature) and submit the packed information to the destination chain.

Bool Network - Messaging Layer