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Introduction

Filecoin Plus aims to maximize the amount of useful storage on Filecoin by adding a layer of social trust to the Network. Clients can apply to Notaries to receive DataCap, which can be used to incentivize Storage Providers (SPs) to take storage deals. SPs who take deals that are compensated with DataCap receive a 10x to their quality adjusted power - increasing their probability of winning block rewards. Filecoin Plus puts power in the hands of Clients and incentivizes SPs to support real use case on the Network.

Using DataCap

How to Get DataCap

Clients can get DataCap by making a request to a Notary - you can find a list of active Notaries on the Filecoin Plus Registry. Notaries may specialize in the types of requests they’ll choose to support - some may hand out small amounts of DataCap freely, while others may support larger requests (but may also require more due diligence). If you're looking to store large data (over 500TiB) - check out the Large Dataset Notary program, which can grant between 500TiB-5PiB of DataCap.

At a minimum, every Notary will require an on-chain Filecoin address to which they can send the requested DataCap. A Client can initialize their address on-chain by sending a minimal amount of Filecoin to it, e.g. as a result of purchasing some FIL from an exchange. As a Client makes deals using DataCap, the balance of DataCap on that address will be depleted. If you run out or need more DataCap allocation, please make a new request using your same address (now that FIP-0012 is live).

How to Spend DataCap

Once you have an address with DataCap, you can make deals using DataCap as a part of the payment. Because SPs receive a deal quality multiplier for taking Fil+ deals, many SPs offer special pricing and services to attract Clients who use DataCap to make deals.

By default, when you make a deal with an address that has DataCap allocated, you will spend DataCap when making the deal.

If making deals through the API, make sure when calling ClientStartDeal that the VerifiedDeal parameter is set to true.

If making deals from the command line, make sure to pass the flag --verified-deal=true as a parameter.

 lotus client deal --verified-deal=true

Checking Remaining DataCap

Once you have received DataCap to an address, you can check the remaining balance either by visiting a site that enables this (e.g. verify.glif.io) or by querying your address on a node.

With lotus v1.10.0 ^

lotus filplus check-client-datacap f00000

With lotus v1.9.0 and below

Note: Lotus-shed is a separate package you will need to build and install (make lotus-shed in the Lotus source), although these features are slated to be merged into Lotus.

lotus-shed verifreg check-client f00000

Finding Storage Providers to Take Fil+ Deals

The general recommendation for clients on the network is to build several replicas of their data on the network, ideally with different SPs / SP entities to spread risk. From a DataCap distribution perspective, guidance is that clients should engage at least 4 SPs and no single SP ID should receive >30% of a client's allocated DataCap. This aligns SP growth incentives with client needs for reliably storing data on the network longer term.

There are a few difference ways in which a client can find a SP to take a Fil+ storage deal:

  • This issue has a list of SPs involved in the discussion below that advertise details about their services
  • Join the #fil-plus channel on Filecoin Slack to discuss storage options
  • Hop into the network with your node and query SPs (using query-ask) to check their verified deal prices

Best Practices

As a client who has received DataCap for making storage deals on Filecoin, this issue is a great starting point. A few of the key thoughts shared in the issue include:

  • Store multiple copies of data across different data centers, and perhaps even regions, to ensure your data is reliably stored
  • Distribute your storage deals across different miners so your data is more likely to be accessible long term
  • Ask for features (like fast retrieval) that would make your experience better
  • Stay in compliance with Miners’ stated Terms of Service and Content Policy

Terminology

DataCap

DataCap, when allocated to a Client, can be spent by the Client in storage deals with miners. These deals carry a higher deal quality multiplier, which increases the “quality adjusted power” of the storage miner on the network (yielding better block rewards for the miner over time). In short, miners are heavily incentivized to take deals from Clients who use DataCap to pay for their deals.

DataCap is granted in batches to Notaries, who in turn, allocate it to responsible clients that spend the DataCap to fund storage deals. DataCap is consumed as it is used to make deals.

Notary

Notaries are selected to serve as fiduciaries for the Filecoin Network, and are responsible for allocating DataCap to clients with legitimate storage use cases. The base responsibilities of notaries include:

  • Allocate DataCap to clients in order to subsidize reliable and useful storage on the network.
  • Verify that Clients receive a DataCap commensurate with the level of trust that is warranted based on information provided.
  • Ensure that in the allocation of the DataCap no party is given excessive trust in any form that might jeopardize the network.
  • Follow operational guidelines, keep record of decision flow, and respond to any requests for audits of their allocation decisions.

You can find a list of the active Notaries here who can allocate DataCap.

Notaries are selected through an application process described here. If approved, Root Key Holders (executors of the decisions made by the community on-chain) grant Notary status and associated DataCap amounts. Those interested in becoming Notaries should apply to this role by filing an Issue in the Notary Governance Repo.

Notaries are given autonomy in their decision making process and encouraged to allocate DataCap based on their best judgement. However, Notaries should expect to answer any potential questions about previous allocation decisions before receiving future DataCap to distribute.

Additionally, to prevent conflicts of interest, Notaries should not allocate DataCap to clients over which they control the private keys. In the event this is an issue, the Notary should contact another Notary (in the same geography or aligned to the same use case) to handle the allocation for that specific client.

See additional information here.

Client

Clients are active participants of the network with DataCap allocation for their use cases. Clients can use their DataCap to incentivize miners to provide additional features and levels of services that meet their specific requirements. In doing so, storage related goods and services on Filecoin are made more valuable and competitive over time. Clients are vetted by Notaries to ensure the client receives DataCap commensurate with their reputation and needs, and that the Client responsibly allocates that DataCap. Obtain verification and DataCap allocation from a Notary. Deploy DataCap responsibly in accordance with the Principles. Follow operational guidelines, keep record of decision flow, and respond to any requests for audits of their allocation decisions.

Specific details on the suggested framework for responsible DataCap allocation are described in the repository. It is expected that clients who intend to receive greater amounts of DataCap may be asked to provide evidence for responsible spending of their previous allocation before receiving more.

Resources

FIP introducing Filecoin Plus: https://github.com/filecoin-project/FIPs/blob/master/FIPS/fip-0003.md

Notary Governance Repo (includes links to bi-weekly Governance Calls): https://github.com/filecoin-project/notary-governance

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