Learn Me A Bitcoin Code

Small, educational snippets of code to help you to understand and work with Bitcoin.

Command Line Tools

• hexdec.rb - Convert hexadecimal to decimal
• dechex.rb - Convert decimal to hexadecimal
• swapendian.rb - Reverse the byte order of a string
• hash256.rb - The double-SHA256 hashing that Bitcoin uses

Learning

• miningsimulator.rb - Hashes a block header until it gets a hash below the target.

• transactionbuilder.rb - Build a transaction from scratch, showing the transaction data as you go.

• keygenerator.rb - Create a set of keys (Private Key, Public Key, Address) for sending and receiving bitcoin.

• scriptdecoder.rb - Decode and run Script.