Theta Fuel (TFUEL) is one of the two native currencies on the Theta blockchain, which was launched in 2017. Using a consensus algorithm based on proof-of-stake, the Theta network adds a multi-level Byzantine Fault Tolerance (BFT) consensus method to its blockchain to improve security and transaction performance.Theta Fuel (TFUEL) is the second token on the Theta blockchain that operates as a utility token and a gas token in decentralized video and data transmission. Furthermore, it is designed to incentivise ecosystem users who share their redundant computer capacity. TFUEL may also be obtained as a block reward by Validator and Guardian nodes on a stake-weighted basis.