Counterparty.io is an open source protocol that allows users to create digital tokens, write Smart Contracts, and execute them on the Bitcoin blockchain. Visit Counterparty.io is an open source protocol that allows users to create digital Asset-backed tokens are claims on an underlying asset, from a specific issuer., write A digital commodity is a scarce, electronically transferrable product or service., and execute them on the A Cryptocurrency address is used to receive and send transactions on the network. An address is most commonly represented as a string of alphanumeric characters and sometimes referred to as wallets. Addresses can also be represented as a scannable QR code. A private key is a string of data that shows you have access to cryptocurrency in a specific wallet. Private keys enable a user to spend from the wallet through a cryptographic signature..