Filecoin（FIL）是什么？

The Filecoin token ($FIL) is the native crypto token of the Filecoin network. Token holders can use $FIL to participate and transact in the Filecoin network.

In particular, users pay miners in $FIL to store or distribute data and retrieve their information. In other words, the Filecoin network uses the $FIL token to incentivize various node types to contribute to the network. Node types include:

• Chain Verifier Node: Synchronizes the Filecoin blockchain and validates the latest blocks to reach a consensus state.
• Client Node: Builds on top of a Chain Verifier Node and must be implemented by any application that is building on the Filecoin network.
• Storage Miner Node: Forms contracts with clients to store data for a period of time. Storage Miner Nodes can earn $FIL whenever new blocks are created, and by completing storage contracts and adding new messages to blocks.
• Retrieval Miner Node: Forms contracts with clients to retrieve a particular set of data. Retrieval Miner Nodes earn $FIL by completing data retrieval contracts. Retrieval Miner Nodes situated in a well-placed location would earn more as they facilitate more transfers, and provide better service due to lower latency.

$FIL will also be used as collateral for miners to participate in the Filecoin ecosystem. The collateral required will be proportional to the storage space provided by miners. Filecoin has three different collateral mechanisms:

• Initial Pledge Collateral: Direct upfront collateral to participate in the economy. This collateral will be slashed if the miner is found to have acted maliciously.
• Block Reward Collateral: To reduce upfront collateral, block rewards are also used as collateral, block rewards for miners are subject to slashing in the event that a sector is terminated before its expiration.
• Storage Deal Collateral: Storage provided by the storage provider to collateralize deals.