ucs01-relay-1

Overview

ucs01-relay-1 is an evm compatible, multihop protocol leveraging packet-forward middleware (PFM). A transfer is decomposed into two smaller transfers, and routed through the middleware to the appropriate chain using the channel and port combination. ucs01-relay-1 is only supported for transfers, as it leverages the memo field to encode routing data.

Protocol

After the critical section in the diagram has been completed, the transfer portion for the user is completed, and funds become transferrable on the destination chain.

Routing

The memo field of the transfer must contain a JSON object with a forward key, which specifies the port and channel to forward into.

{
  "forward": {
    "port": 5,
    "channel": 30,
    "recipient": "0x..."
  }
}

On Union, the PFM middleware will create a new transfer with a new sequence number using the routing info.