About Firo
What is Firo (FIRO)?
Firo is an independent cryptocurrency focused on private payments. It launched as Zcoin in 2016 and adopted the Firo name in 2020. The rebrand continued the existing blockchain and its transaction history. FIRO is the native coin used for payments and transaction fees. The project has introduced several generations of privacy technology, including Sigma, Lelantus and Lelantus Spark. Spark went live on Firo's mainnet on January 18, 2024.
What does Spark do?
Spark lets users transfer shielded FIRO while concealing amounts and the link to the coins being spent. Its zero-knowledge proofs allow nodes to check a payment's validity without publishing those details. A Spark receiving address can be shared with someone paying you, but it is not recorded as a searchable address on the blockchain. Spark also supports viewing keys for selective disclosure. Its cryptographic design does not require a trusted setup ceremony.
Are all Firo addresses shielded?
Firo supports different address types. Spark addresses receive shielded funds, while transparent addresses expose transaction information. Exchange addresses, also called EX-addresses, are a transparent format designed for services that need that visibility. A transfer involving a transparent destination can therefore disclose details that a payment within Spark conceals. Check the address type accepted by the receiving service; Spark support in a personal wallet does not establish an exchange's supported transfer types.
How is the Firo network secured?
Miners produce blocks using FiroPoW, a proof-of-work algorithm designed for GPUs. Masternode quorums provide ChainLocks by signing the first valid block they observe at a given height. Nodes use those signatures to reject conflicting blocks, limiting reorganizations of locked history. Running a masternode requires registered collateral and an operating node. The mining reward, masternode reward and development allocations are separate portions of the block subsidy.
How does FIRO issuance work?
Firo's 2024 monetary policy keeps the block subsidy at 6.25 FIRO until the main emission schedule reaches approximately 21.4 million coins. A continuing subsidy of one FIRO per block follows. This tail emission means FIRO has no fixed final supply cap. The adopted allocation gives 70% of the subsidy to masternodes, 5% to miners, 15% to development and 10% to the community fund. These rules replaced the previous schedule of repeated halvings.
How do I transfer or trade FIRO on NonLogs?
Use the native Firo network and an address type accepted by the current deposit or withdrawal form. Copy the destination from the receiving wallet or service and check any minimum amount and confirmation requirements shown there. Keep the sending wallet's transaction record. The FIRO markets appear below. Select Trade beside a pair to open its order book and trading page. Prices and volumes in the trading-pairs table below reflect completed NonLogs trades.