An I2P SAM library: enabling applications to communicate through the I2P network. I2P is a fully distributed, "privacy-by-design" network.
To get I2P up and running, take a look at the project: https://github.com/diva-exchange/i2p
I2P is an instantly available peer-to-peer network which can be used for things like:
- chat, social media and alike - all private and secure
- distributed databases, aka blockchains (see https://testnet.diva.exchange as an example)
- gaming, file sharing and ... whatever else you come up with
I2P is fully distributed, well researched and gets further developed by a competent community.
This I2P SAM library helps developers to create an I2P application quickly and hassle-free.
npm i @diva.exchange/i2p-sam
or, lighter, without developer dependencies:
npm i --omit dev @diva.exchange/i2p-sam
Send an HTTP GET request to diva.i2p and output the response:
import { createStream } from '@diva.exchange/i2p-sam';
createStream({
stream: {
destination: 'diva.i2p'
},
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
},
}).then((sam) => {
sam.on('data', (data: Buffer) => {
console.log('Incoming Data: ' + data.toString());
});
sam.send(Buffer.from('GET / HTTP/1.1\r\nHost: diva.i2p\r\n\r\n'));
});
Forward incoming streaming data to a local socket server:
import { createStream, createForward, I2pSamStream } from '@diva.exchange/i2p-sam';
import net from 'net';
(async () => {
const serverForward = net.createServer((c) => {
console.debug('client connected');
c.on('end', () => {
console.debug('client disconnected');
});
c.on('data', (data: Buffer) => {
console.debug(data.toString());
c.write(`Hello Client!\n`);
});
});
serverForward.listen(20222, '127.0.0.1');
const samForward: I2pSamStream = await createForward({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
},
forward: {
host: '127.0.0.1', # your local listener, see above
port: 20222, # your local listener, see above
},
});
const samClient: I2pSamStream = await createStream({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
},
stream: {
destination: samForward.getPublicKey()
},
});
// event handler
samClient.on('data', (data: Buffer) => {
console.debug(data.toString());
});
// send some data to destination
samClient.stream(Buffer.from(`Hi Server!\n`));
})();
Send messages from peer A to peer B through the I2P network:
import { createDatagram, toB32 } from '@diva.exchange/i2p-sam';
(async () => {
// instantiate Peer A
const peerA = await createDatagram({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
}
});
// instantiate Peer B
const peerB = await createDatagram({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
},
listen: {
address: '127.0.0.1', # udp listener
port: 20202 # udp listener
}
}).on('data', (data: Buffer, from) => {
console.debug(`Incoming Data from ${toB32(from)}: ${data.toString()}`);
});
// send 100 messages via UDP, every 500ms a message
// IMPORTANT: UDP is not reliable. Some messages might get lost.
const msg: string = 'Hello World';
await new Promise((resolve) => {
let t = 0;
const i = setInterval(() => {
peerA.send(peerB.getPublicKey(), Buffer.from(`${t} ${msg}`);
if (t++ >= 100) {
clearInterval(i);
resolve(true);
}
}, 500);
});
})();
Send messages from peer A to peer B through the I2P network:
import { createRaw } from '@diva.exchange/i2p-sam';
(async () => {
// instantiate Peer A
const peerA = await createRaw({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
}
});
// instantiate Peer B
const peerB = await createRaw({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
},
listen: {
address: '127.0.0.1', # udp listener
port: 20202 # udp listener
}
}).on('data', (data: Buffer) => {
console.log('Incoming Data: ' + data.toString());
});
// send 100 messages via UDP, every 500ms a message
// IMPORTANT: UDP is not reliable. Some messages might get lost.
const msg: string = 'Hello Peer B - I am Peer A';
await new Promise((resolve) => {
let t = 0;
const i = setInterval(() => {
peerA.send(peerB.getPublicKey(), Buffer.from(`${t} ${msg}`);
if (t++ >= 100) {
clearInterval(i);
resolve(true);
}
}, 500);
});
})();
Get the public key of the local destination.
Example:
import { createDatagram } from '@diva.exchange/i2p-sam';
createDatagram({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
}
}).then((sam) => console.log(sam.getPublicKey()));
Get the private key of the local destination.
Example:
import { createDatagram } from '@diva.exchange/i2p-sam';
createDatagram({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
}
}).then((sam) => console.log(sam.getPrivateKey()));
Get the public and private key of the local destination.
Example:
import { createStream } from '@diva.exchange/i2p-sam';
createStream({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
},
stream: {
destination: 'diva.i2p'
},
}).then((sam) => console.log(sam.getKeyPair()));
Close a SAM connection.
Example:
import { createRaw } from '@diva.exchange/i2p-sam';
(async () => {
const sam = await createRaw({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
}
});
sam.close();
})();
Convert a destination to a b32 address (without any extensions - just a Base32 string).
Example:
import { toB32 } from '@diva.exchange/i2p-sam';
console.log(toB32('[some base64-encoded destination]'));
createLocalDestination(c: Configuration): Promise<{ address: string, public: string, private: string }>
Create a new local destination and return its properties.
Example:
import { createLocalDestination } from '@diva.exchange/i2p-sam';
createLocalDestination({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
}
}).then((obj) => console.log(obj));
Lookup (aka resolve) an I2P address (like diva.i2p or also a .b32.i2p address) to a destination. The destination, which is the public key, is a base64 encoded string.
Example:
import { lookup } from '@diva.exchange/i2p-sam';
lookup({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
}
}, 'diva.i2p').then((dest) => console.log(dest));
Example: see the Get Started: How to Use Streams above.
Example: see Get Started: How to Use Datagrams above.
type tSession = {
id?: string;
options?: string;
};
type tStream = {
destination: string;
};
type tForward = {
host: string;
port: number;
silent?: boolean;
};
type tListen = {
address: string;
port: number;
hostForward?: string;
portForward?: number;
};
type tSam = {
host: string;
portTCP: number;
portUDP?: number;
versionMin?: string;
versionMax?: string;
publicKey?: string;
privateKey?: string;
};
export type Configuration = {
session?: tSession;
stream?: tStream;
forward?: tForward;
listen?: tListen;
sam?: tSam;
};
type ConfigurationDefault = {
session: tSession;
stream: tStream;
forward: tForward;
listen: tListen;
sam: tSam;
};
const DEFAULT_CONFIGURATION: ConfigurationDefault = {
session: {
id: '',
options: '',
},
stream: {
destination: '',
},
forward: {
host: '',
port: 0,
silent: false,
},
listen: {
address: '127.0.0.1',
port: 0,
hostForward: '',
portForward: 0,
},
sam: {
host: '127.0.0.1',
portTCP: 7656,
portUDP: 7655,
versionMin: '',
versionMax: '',
publicKey: '',
privateKey: '',
},
};
Incoming data.
Generic Error event - emitted if sockets report errors.
import { createRaw } from '@diva.exchange/i2p-sam';
(async () => {
const sam = await createRaw({
sam: {
host: '127.0.0.1', # your local I2P SAM host
portTCP: 7656 # your local I2P SAM port
}
});
sam.on('error', (error) => console.debug(error));
})();
Emitted if one of the involved sockets got closed.
Assumptions:
- git, node and npm is available.
- docker and docker-compose is available.
Clone the source code from git git clone https://github.com/diva-exchange/i2p-sam.git and enter the folder i2p-sam.
Prepare the test environment by creating the docker container:
docker-compose -f test/sam.diva.i2p.yml up -d
Check whether the I2P test node is properly running by accessing the local console on: http://172.19.74.11:7070.
To modify the IP address of the local console, adapt the file test/sam.diva.i2p.yml.
After the docker container is running for about five minutes (reason: the I2P network needs some minutes to integrate), execute the unit tests:
npm run test
Executing the unit tests will take around 5 minutes. Reason: the communication via I2P gets tested - which is the purpose of this library.
Stop the container (and purge all data within):
docker-compose -f test/sam.diva.i2p.yml down --volumes
To lint the code, use
npm run lint
On DIVA.EXCHANGE you'll find various options to get in touch with the team.
Talk to us via Telegram https://t.me/diva_exchange_chat_de (English or German).
Your donation goes entirely to the project. Your donation makes the development of DIVA.EXCHANGE faster.
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Awesome, thank you!
SAM docs: https://geti2p.net/en/docs/api/samv3
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