gistfile1.md

bitcoin-details

• protocol documentation in wiki
• sample network traffic, bitcoin messages, keys, ...

bitcoin-mobile-android

Bare-bones initial product

Main
  --> Receive_EnterAmount --> Receive_ShowQRInvoice --> Main
  --> Scan --QR Invoice--> Pay_ConfirmPayment --> Main

Later

• TX QR codes (so the sender doesn't need to use the internet)
• use SQLCipher as a drop-in replacement for SQLite
• forex via {TruCoin, ...}
• address book
• key management/backup
• ...

node-bitcoin-library

• NodeJS and C
• encode messages
• MessageParser
  • parser = new MessageParser
  • socket.on('data', function(data){parser.update(data)})
  • parser.on('version', function(m){if(m.version >= 209){...}})
• create a {private key, signed transaction message, ...}
• verify a {transaction, block, ...}

node-bitcoin-node

• API
• backed by {Redis, some scalable KV store}
• massively scalable
• define a set of VIP peers, try to maintain connections with them
  • e.g. TruCoin EC2 micros in {US-East, Ireland, Singapore}, every mining pool
• Optionally log each socket data event (with a millisecond timestamp)
• Explore ways to speed up propagation (e.g. propagating an INV before the (GETDATA, TX) round trip)

node-bitcoin-wallet

• API
• backed by {Redis, SQL}
• optional fine-grained control of which keys to use as inputs

node-bitcoin-mining-pool

• massively scalable (mining pools are having scaling problems with the original bitcoind)
• require a 0.001 BTC transaction fee (configurable)
• public API:
  • check settings (like fee requirements)
  • TCP feed of accepted TXs

hft-exchange

NodeJS user-facing nodes

• ...

C core

• single-threaded
• price-time priority limit order matching engine
• emit private events

private event stream (append-only)

• Each event contains some random salt (e.g. 15 bytes)
• The user who triggered an event (e.g. the buyer in a BID event) gets a copy

public event stream

Each event...

• corresponds to a private event
• redacts fields like account_id
• contains a hash (e.g. 30 bytes) of its private event