cosmos-sdk/docs/spec/ibc/ibc.md

IBC Spec

This is a living document and should be edited as the IBC spec and implementation change

MVP1

The initial implementation of IBC will include just enough for simple coin transfers between chains, with safety features such as ACK messages being added later.

IBC Module

type IBCOutMsg struct {
  IBCTransfer
}

type IBCInMsg struct {
  IBCTransfer
}

type IBCTransfer struct {
  Destination sdk.Address
  Coins       sdk.Coins
}

Relayer

Packets

• Connect to 2 Tendermint RPC endpoints
• Query for IBC outgoing IBCOutMsg queue (can poll on a certain time interval, or check after each new block, etc)
• For any new IBCOutMsg, build IBCInMsg and post to destination chain

CLI

• Load relay process
• Execute IBCOutMsg