None

Custom code

• Why built if exists

Liquid Apps

• More complex to implement, requires EOSIO 2.X, EOS-ETH bridge not yet in mainnet

• See detailed analysis

Chainlink

• More complex to implement.

• Requires link token payments.

Band Protocol

• BAND relies information securely, but an oracle to trigger transactions on FIO and Ethereum would still be required.

THOR Chain

• Very interesting solution utilizing one-way pegs

• Mainnet not yet launched.

Proposal from ScopeLift to build this for $1,500 - $2,250 based on similar projects.

• Alien Teleport already has Ethereum contract and adding ERC-721 would not be very complex.