Stellar transaction fees are paid in stroops (1 XLM = 10,000,000 stroops). Fordefi computes these fees automatically for every transaction; they are not user-configurable.
The fee calculation is based on whether the transaction targets the classic protocol or the Soroban smart-contract environment:
Classic Operations: Transactions such as XLM transfers, trustline changes, and claimable balances pay only an inclusion fee. Fordefi sets this to the network minimum of 100 stroops per operation. Total Fee =
100 stroops×number of operationsSoroban Operations: Smart-contract invocations (including Soroban token transfers) pay both an inclusion fee and a resource fee. The resource fee covers CPU instructions, ledger entry reads/writes, and transaction size. Fordefi simulates the transaction to determine the resource fee and adds a safety buffer. ◦ Total Fee =
inclusion_fee+resource_fee_with_buffer