BigchainDB and Smart Contracts ============================== One can store the source code of any smart contract (i.e. a computer program) in BigchainDB, but BigchainDB won't run arbitrary smart contracts. BigchainDB will run the subset of smart contracts expressible using `Crypto-Conditions `_. Crypto-conditions are part of the `Interledger Protocol `_. The owners of an asset can impose conditions on it that must be met for the asset to be transferred to new owners. Examples of possible conditions (crypto-conditions) include: - The current owner must sign the transfer transaction (one which transfers ownership to new owners). - Three out of five current owners must sign the transfer transaction. - (Shannon and Kelly) or Morgan must sign the transfer transaction. Crypto-conditions can be quite complex. They can't include loops or recursion and therefore will always run/check in finite time. .. note:: We used the word "owners" somewhat loosely above. A more accurate word might be fulfillers, signers, controllers, or transfer-enablers. See BigchainDB Server `issue #626 `_.