Fuel uses a similar model to Ethereum for contracts and cross-contract calls. Contracts may call other contracts with a CALL similar to an Ethereum message call ). Unlike the EVM, which can only forward its base asset with a call (i.e. ETH), the FuelVM can forward a single native fungible asset with a call.
Transactions may initiate contract calls. Ethereum transactions may call a single contract directly . Fuel transactions instead execute a script (arbitrary bytecode attached to the transaction), which may call any number of contracts.