Now let's explore truffle-contract APIs. Basically, truffle-contract has two APIs, that is, the contract abstraction API and the contract instance API. A contract abstraction API represents various kinds of information about the contract (or a library), such: as its ABI; unlinked byte code; if the contract is already deployed, then its address in various ethereum networks; addresses of the libraries it depends on for various ethereum networks if deployed; and events of the contract. The abstraction API is a set of functions that exist for all contract abstractions. A contract instance represents a deployed contract in a specific network. The instance API is the API available to contract instances. It is created dynamically based on functions available in your Solidity source file. A contract instance for a specific contract is created from a contract abstraction that represents the same contract.