Storage Protocol

Storage Protocol made by DeNet Team.

WIP: Contract Strorage

Contract Storage available by address: 0xf1EFEd8F60b10B897A474E0470FE038bb2D2F1fa on polygon network.

Storage protocol consists of two dependent applications - storage node, and ProofOfStorage validation algorithm.. The ProofOfStorage contract is the core feature that allows you to build decentralized storage on top of any EVM.

Main features of PoS contract

Proof-of-Storage contract helps nodes and clients achieve consensus and auto-scalability without 100% uptime from client side. But the node must always be online.

• No protocol fees
• No scaling limit
• No need to create your own blockchain
• No system-requirements for creating proof
• Works with any EVM-compatible blockchain
• Support any ERC20 tokens for payments
• Gas limit of one proof lower than usual token swap

Deploy Notes

v3.0.2 Node NFT

• Added whitelist
• Updated limit algo into proofs

v3.0.2 Payments

• Removed "Automigration"
• Removing "token" address from getBalance
• Removing "token" address from localTransferFrom
• maxDepositPerUser updated from 1 USDC to 100 USDC (need to fix later)
• fixes with require error text

v3.0.2 PoS

• Added user_storage_size for payments
• Added user_storage_size for user storage
• Updates Signatures from User
• Solidity Version upgrade ^0.8.0 > 0.8.9 in PoS
• AutoTest Updated
• Last Block Proof changed to Last Proof Timestamp
• Support old payments version in PoS
• IsValidSign replaced into ECDSA from PoS
• removed "IPayments" from getUserRewardInfo
• Added minimal proofrange
• Added code comments
• Added base_difficulty changing via sending proofs
• Added debug mode (to disable check of user signature) (will depricated in v4 or later)
• AutoDifficulty fix

v0.2.0 Payments

• Bug fix
• GasToken Creation
• AutoMigration from old versions

v0.2.0 PoS

• Added Node NFT
• Added new version of Payments contract

v0.1.0

• First ProofOfStorage Contract

Deploy Contract History

Name	Network	Address	Updated	Status
NodeNFT	Kovan	0x805F977832959F39Cd7C2D9cDf5B30cE5A560d16	2021-12-21	V3.0.2
ProofOfStorage	Kovan	0x721F6078C009453bFdfa702f05aD54df7900B0eA	2021-12-20	V3.0.2
UserStorage	Kovan	0x721F6078C009453bFdfa702f05aD54df7900B0eA	2021-12-20	V3.0.2
Payments V2	Kovan	0x0dC0B02e6763fC4f57176A6813d7B100C169AcC1	2021-09-09	V0.3.0
Reward	Kovan	0x7708A1Bd5C36e6f57C39c089575163662B35Ea94	2021-09-15	V0.3.0
UserStorage	Kovan	0x6C5eb19854A80037C7E911128CFF13E81841A40F	2021-05-26	V0.1.0
Payments	Kovan	0xA260B0aD50fB996cEffa614bAb75846E06991622	2021-07-02	V0.1.0
ProofOfStorage	Kovan	0x2E8630780A231E8bCf12Ba1172bEB9055deEBF8B	2021-05-22	V0.1.0
DFILE Token	Kovan	0x0d3C95079Ff0B4cf055a65EF4b63BbB047456848	2021-05-21	V0.1.0

Problem description:

Consensus algorithm requirements:

• Minimum system requirements
• Minimum blockchain using
• Infinity scalability
• Decentralized
• Zero Knowledge Proofs (no sending full file for proof, or no using third-party)
• Proving files without any metadata storing in blockchain
• The complexity of the security of your own blockchain

Step By Step proof creation and validation:

Node operate and provide storage proofs without third-party:

1. Load MerkleTree from user FS
2. Select any file from user FS
3. Make proof for selected file and one of 100 latest blocks
4. Verify proof % base_diff < selected user difficulty
5. Send proof to Smart Contract to get rewarded

Where:

• user FS - User filesystem merkle tree of selected user.
• proof - f(MerkleTree8kb, RHFS, nonce, digsig) (returns sha256(node address + file + blockhash)
• user_difficulty - (selected block number).sub(last proof block number for this user)
• base_diff - Constanta or dynamically updatable number
• reward - min((1/365 x days from last proof), 7) x deposited amount

More about PoS will available in docs

Smart contracts:

1. ProofOfStorage

   Main contract for getting rewarded by ProofOfStorage

   Available methods:

   • makeDeposit (deposit reward for storage)
   • closeDeposit (withdraw rewards)
   • sendProof (Send proof from node)
   • sendProofFrom (Send proof for other node)
   • getUserRewardInfo (Returns info about user reward for ProofOfStorage)
   • getUserRootHash (get last uploaded user root hash)

2. Payments

   Contract for make local transfers for rewarding PoS actions

   Available methods:

   • localTransferFrom (call from PoS if valid proof)
   • depositToLocal (deposit funds from other token, call from PoS if deposit)
   • closeDeposit (withdraw funds, call from PoS if closing deposit)

3. User Storage

   Contract for storing the last version of storage root hash and emit data about updater for nodes updated.

   Available methods:

   • updateRootHash (call from PoS, if updated user root hash from valid proof or signature)
   • updateLastBlockNumber (call from PoS, if valid proof)
   • setUserPlan (call from PoS, if updated Token for payments)

Schema

Benchmarks

Est Gas Amount to send proof

Part Size	Gas	TX	Save on blockchain
8kb	163,969 gas	Kovan Testnet	No
16kb	300,038 gas	Kovan Testnet	No
16kb	10,581,008 gas	Kovan Testnet	Yes