I2p-cp

I2CP is essential for the I2P ecosystem because it provides a consistent API for various programming languages. While the primary I2P router is written in Java, I2CP allows clients written in C++, Python, or Go to interface with it seamlessly. This has enabled the integration of I2P into diverse projects, such as the Monero cryptocurrency for transaction privacy.

: The client sends a protocol version byte (typically 0x2A ) to ensure compatibility.

: Since I2P is a packet-switched network where messages can be lost or delayed, I2CP is inherently asynchronous, allowing applications to manage their own reliability or use the built-in streaming library for TCP-like behavior. The Initialization Process

Notifies the client that a new message has been received from the network.

: A CreateSession message is sent, containing the application's configuration and its cryptographic Destination (public key).

: The router builds inbound tunnels and requests a "LeaseSet" from the client. This LeaseSet serves as a signed set of "entry points" that other peers can use to reach the application anonymously. Key I2CP Message Types Message Type SendMessage

: The client application and the I2P router can reside on the same machine or different ones, communicating over a local or network socket.

Requests the router to resolve a human-readable name (like example.i2p ) to a cryptographic Destination.