mqttt

MQTT-Trusted is the trusted messaging framework based on MQTT and crypto signatures.

Installation

npm install --save mqttt

Usage

Message JSON format

{
    "from": "",
    "to": "",
    "timestamp": new Date().getTime(),
    "type": "request"/"response"/"command"/"service"/"notification", 
    "data": "",
    "seqno": 0,
}
 

MQTTT APIs

• mqttt.deriveHDAccount(mnemonic, rpcserver, idx)

MQTTT Client APIs

• client = new mqttt.MQTTT(address{String}, signer{Signer}, mqtt_broker_url{String}, [ttv]{Number})
• client.send(to{String}, data{String/Buffer}, type{String})
• client.listen(checkDate{Boolean}, (err{Error}, msg{String}) => {})
• client.stop()
• client.subscribe(topic{String})
• client.unsubscribe(topic{String})

Note: client.send to topic (starts with '/') instead of target address witll be sent as broadcast.

Signer APIs

Currently the library supports Web3Signer, PrivKeySigner and HardwareSigner. HardwareSigner requires the compatible hardware and signing api on the hardware.

• web3Signer = new mqttt.signers.Web3Singer(web3, signHash, recoverHash)
• privkeySigner = new mqttt.signers.PrivKeySigner(privkey, signHash, recoverHash)
• hardwareSigner = new mqttt.signers.HardwareSigner(hsmClient, signHash, recoverHahs)
• signer.sign(msg, account, callback)
• signer.recover(msg, sig, callback)

signHash is the type of the hash before feeding the message to the web3 eth_sign function. Providing the flexsibility to specify the hash type is to work around the incompatible eth_hash API since geth 1.5. For signHash, you can specify 'hash', 'hashPersonal' and 'nohash'. For recoverHash, you can specify 'hash' and 'hashPersonal'.

Examples

Check examples/ for more usages.

TODO

• Add hashing method negotiation.
• Publish RFC documents on common message types and common topic naming conventions.

License

Apache-2.0