Records Smart Contract

Overview

The Records Smart Contract is a decentralized application (DApp) deployed on the Ethereum blockchain. It allows users to post, edit, report, verify, and flag tweets, which are stored as files on the blockchain. Verifiers play a crucial role in verifying the authenticity of tweets, while users can interact with the contract to manage their tweets.

Features

• Users can post new tweets.
• Users can edit their previously posted tweets.
• Verifiers can register and verify the authenticity of tweets.
• Users can report tweets for review by verifiers.
• Verifiers can flag reported tweets as legitimate or permanently flagged.

Contract Details

• Language: Solidity
• Compiler Version: 0.8.24
• License: GNU General Public License v3.0
• SPDX-License-Identifier: GPL-3.0

Modifiers

1. onlyOwner

• Description: Restricts access to functions to only the contract owner.
• Usage: Applied to functions that should only be callable by the contract owner.

2. onlyverfier

• Description: Restricts access to functions to only registered verifiers.
• Parameters:
  • vr: The address of the verifier.
• Usage: Applied to functions that should only be callable by registered verifiers.

Events

1. NewRecord

• Description: Records new files added.
• Parameters:
  • sender: The address of the sender.
  • message: The message of the tweet.

2. IncomingFlags

• Description: Records all the flags.
• Parameters:
  • wer: The address of the flagger.
  • ssss: The flag message.

3. TweetEvent

• Description: Records the files (tweets).
• Parameters:
  • pinnu: An array of strings representing the tweets.
  • abhi: The address of the user.

4. VerifiedRecord

• Description: Records all the verified records.
• Parameters:
  • verifier: The address of the verifier.
  • user: The address of the user.
  • CID: The CID of the verified record.

5. FileReported

• Description: Records all the reported files.
• Parameters:
  • reporter: The address of the reporter.
  • CID: The CID of the reported file.
  • flag: Boolean indicating whether the file was flagged.

6. FileFlagged

• Description: Records all the flagged files.
• Parameters:
  • verifier: The address of the verifier.
  • CID: The CID of the flagged file.
  • decision: Boolean indicating the decision on the flag.

7. FilePermanentlyFlagged

• Description: Records all the permanently flagged files.
• Parameters:
  • CID: The CID of the permanently flagged file.

8. tweetedited

• Description: Records all the edited files (tweets).
• Parameters:
  • newtweet: The edited tweet message.
  • indexat: The index of the tweet.

Other Variables

1. CheckRecord

• Type: Mapping
• Description: Check for existing file records.

2. Record

• Type: Mapping
• Description: Store the file CID.

3. registeredUsers

• Type: Mapping
• Description: Tracks registered users.

4. registeredVerifiers

• Type: Mapping
• Description: Tracks registered verifiers.

5. verifiedFiles

• Type: Mapping
• Description: List of verified files by user.

6. reportedfile

• Type: Mapping
• Description: Used to report files.

7. permanentlyFlaggedFiles

• Type: Mapping
• Description: List of permanently flagged files.

8. addressstringmapping

• Type: Mapping
• Description: Stores the address and the number of files reported.

9. listofreportedfiles

• Type: Mapping
• Description: Stores the reporter for each CID.

10. togetheuseradd

• Type: Mapping
• Description: Returns the user address using a function.

11. verifiedrecords

• Type: Mapping
• Description: Holds the verified records.

12. flaggedfiles

• Type: Mapping
• Description: Holds the CID of all the flagged files.

13. isAdmin

• Type: Mapping
• Description: Currently not in use, will be used in the future.

14. reporterList

• Type: Mapping
• Description: List of reporters.

15. cidcheck

• Type: Mapping
• Description: Used to check for the CID.

16. owner

• Type: Address
• Description: Address of the contract deployer.

17. receiver

• Type: Payable Address
• Description: Same as the contract deployer.

18. users

• Type: Unsigned Integer
• Description: Total number of registered users.

19. verifier

• Type: Unsigned Integer
• Description: Total number of registered verifiers.

20. verifierslist

• Type: Array of Addresses
• Description: List of verifiers.

21. registeredUsersList

• Type: Array of Addresses
• Description: Registered user list.

22. reportercount

• Type: Unsigned Integer
• Description: Number of reporters.

23. cidcount

• Type: Unsigned Integer
• Description: Number of CIDs.

Callable Functions

1. postTweet

• Description: Allows users to post a new tweet.
• Parameters:
  • message: The content of the tweet.
  • user: The address of the user posting the tweet.
• Modifier: onlyOwner

2. editTweet

• Description: Enables users to edit their previously posted tweets.
• Parameters:
  • message: The new content of the tweet.
  • old_CID: The CID (Content Identifier) of the tweet to be edited.
  • user: The address of the user editing the tweet.
  • index: The index of the tweet in the user's tweet list.
• Modifier: onlyverfier

3. getTweets

• Description: Retrieves a user's own tweets.
• Parameters:
  • user: The address of the user whose tweets are to be retrieved.

4. reportFile

• Description: Allows users or verifiers to report a tweet.
• Parameters:
  • CID: The CID (Content Identifier) of the tweet being reported.
  • reporter: The address of the user or verifier reporting the tweet.
  • user: The address of the user who posted the tweet.

5. flagFile

• Description: Enables verifiers to flag reported tweets.
• Parameters:
  • CID: The CID (Content Identifier) of the tweet being flagged.
  • verifierAddress: The address of the verifier flagging the tweet.
  • decision: A boolean indicating whether to flag the tweet as legitimate or permanently flagged.
• Modifier: onlyverfier

6. registerAsVerifier

• Description: Registers a new verifier (callable by the contract owner).
• Parameters:
  • verifierAddress: The address of the verifier being registered.
• Modifier: onlyOwner

7. verifyRecords

• Description: Allows verifiers to verify the authenticity of tweets.
• Parameters:
  • verifierAddress: The address of the verifier verifying the tweet.
  • user: The address of the user who posted the tweet.
  • CID: The CID (Content Identifier) of the tweet being verified.
• Modifier: onlyverfier

Internal Functions

1. depositUsingTransfer

• Description: Function to transfer ether.
• Parameters:
  • to: The address to which the ether is being transferred.
  • amount: The amount of ether being transferred.

2. sizeofrecords

• Description: Returns how many records an address has.
• Parameters:
  • ac: The address for which the number of records is to be determined.

3. checkforsametweet

• Description: Checks if a user has a tweet with the same CID.
• Parameters:
  • user: The address of the user.
  • CID: The CID (Content Identifier) of the tweet.

4. getDataIndex

• Description: Returns the index of a tweet in a user's tweet list.
• Parameters:
  • user: The address of the user.
  • CID: The CID (Content Identifier) of the tweet.

5. fetchreporter

• Description: Returns the address of the reporter who reported a tweet.
• Parameters:
  • CID: The CID (Content Identifier) of the tweet.

6. getAddressForMatchingTweets

• Description: Returns the address of the user who posted a tweet matching a given CID.
• Parameters:
  • reporter: The address of the reporter who reported the tweet.
  • searchString: The CID (Content Identifier) of the tweet.

7. deleteStringverifiedfiles

• Description: Deletes a specific string from the verifiedFiles mapping.
• Parameters:
  • addr: The address for which the string is to be deleted.
  • stringToDelete: The string to be deleted.

8. deleteStringFromArrayRecord

• Description: Deletes a specific string from the Record mapping.
• Parameters:
  • addr: The address for which the string is to be deleted.
  • valueToDelete: The string to be deleted.

9. deleteStringFromArrayverifiedFiles

• Description: Deletes a specific string from the verifiedFiles mapping.
• Parameters:
  • addr: The address for which the string is to be deleted.
  • valueToDelete: The string to be deleted.

10. deleteStringValue

• Description: Deletes a specific string from a mapping.
• Parameters:
  • addr: The address for which the string is to be deleted.
  • valueToDelete: The string to be deleted.

Usage

1. Deploy the contract on an Ethereum network.
2. Use the provided functions to interact with the contract:
   • Post tweets.
   • Edit tweets.
   • Verify tweets.
   • Report tweets.
   • Flag tweets.
   • Register as a verifier.

License

This project is licensed under the terms of the GNU General Public License v3.0. For more details, see the LICENSE file.