Running nodes

See Building a node and History node.

FIO token transfer transactions

FIO token

FIO Chain’s native token is FIO. FIO is the only token present on the FIO Chain.

There are 1,000,000,000 Smallest Units of FIO (SUFs) inside 1 FIO. All transactions in FIO Protocol are expressed in SUFs.

Transferring FIO token

Tokens on the FIO Chain are transferred using /transfer_tokens_pub_key method.

The method requires payee FIO Public Key. The key is hashed down to an account name and funds are transferred to that account. If that account does not exist, it gets created automatically.

The native EOSIO transfer action is not supported.

Checking token balance

Token balance can be obtained by passing FIO Public Key to /get_fio_balance API method.

Transaction history

See History node

Transaction memo

/transfer_tokens_pub_key does not accept a memo field. To attach a memo to a FIO token transfer, both payer and payee must have a FIO Address. See FIO integration.

Handling FIO token deposits

Using unique FIO Public Key

Similar to UTXO-based chains, to accept FIO token deposit, an exchange may generate a unique FIO Public Key for every user or deposit. Unlike EOSIO, FIO Chain does not require that key to be assigned to an existing account before funds are sent to it. Once a token transfer is initiated to that Public Key, the account will be created automatically.

FIO Chain’s is registered at index 235/0x800000eb on the SLIP-44.

FIO Private Keys follow standard Wallet Import Format (WIF) standard and public keys follow well-known base58 encoding with FIO prefix, e.g.


For those who have integrated EOSIO, FIO public keys follows the same format, except the prefix is FIO instead of EOS.

FIO Key Derivation Path:


See Private/Public Keys for more information including testing examples.

Using FIO Address or FIO Request

See FIO integration.

Handling FIO token withdrawals

Using FIO Public Key

With this option, the user’s withdrawal area on the exchange would ask for a FIO Public Key and the amount of withdrawals. The transfer would be executed using /transfer_tokens_pub_key and metadata recorded using /record_obt_data.

Using FIO Address or FIO Request

See FIO integration.

Obtaining token supply in real-time

The Foundation operates API end-point which returns token supply statistics, specifically:

Statistic Description End-point
Total supply All tokens that were ever minted. Maximum token supply is capped at 1,000,000,000 FIO.
Circulating supply Total supply less locked tokens.
Locked tokens Tokens which are locked and cannot be transferred.

Data returned includes 9 decimal points, e.g. 705906876.848960519

To return data in Smallest Units of FIO (SUFs), add /suf to end point, e.g.

To return the data as json, add ?json=true top end point, e.g.