MultiSigWallet-Lending-Borrowing Contract

This contract is a Solidity implementation of a MultiSigWallet-Lending-Borrowing system, enabling decentralized peer-to-peer lending and borrowing of digital assets through multi-signature wallets.

Features

• Multi-Signature Wallets: Control over funds is distributed among multiple parties, typically lenders and borrowers, using multi-signature wallets.
• Lending and Borrowing: Lenders can deposit digital assets into a shared pool, while borrowers can request loans from this pool with predefined terms.
• Transaction Approval: Transactions are initiated, approved, and executed through a consensus mechanism involving multiple signers.
• Loan Approval and Repayment: Loans can be approved by signers and repaid by borrowers with interest, facilitating transparent and secure lending processes.
• Financial Inclusion: The contract promotes financial inclusion by offering borderless and permissionless access to lending and borrowing facilities.

Contract Structure

The contract consists of the following key components:

• MultiSigWallet: Manages the multi-signature wallets and facilitates transaction approval.
• Loan Management: Handles loan requests, approvals, and repayments, ensuring transparent and secure lending operations.
• Event Logging: Logs events such as transaction raising, approval, execution, loan requests, approvals, and repayments for transparency and auditing purposes.

Modifiers

• onlyowner: Ensures that only the contract owner can execute the function.
• onlysigner: Restricts the function to be accessible only by authorized signers.
• signerexists(address _signer): Verifies the existence of a signer with the provided address.
• txnexists(uint _txid): Checks the existence of a transaction with the given ID.
• txnexists2(uint _txid): Validates the existence of a transaction and that the sender has already approved it.
• exestatus(uint _txid): Verifies that the transaction with the given ID has not been executed yet.
• notasigner: Ensures that the sender is not a signer.
• loanexists(uint _lnid): Checks if a loan exists with the provided ID.
• loannotexecuted(uint _lnid): Verifies that the loan with the given ID has not been executed yet.
• hasnotrepayed(uint _lnid): Checks if the borrower has not repaid the loan yet.
• amtrequire(uint _lnid): Requires the sent amount to match the loan amount plus interest.

Functions

Callable Functions

• addsigner(address _signer): Adds a new signer to the list of authorized signers.
• revokesigner(address _signer): Revokes signer privileges from a specified address.
• raiseatxnrequest(address _to, uint _amount, bytes calldata _data): Initiates a transaction request to transfer funds.
• txnapproval(uint _txid): Approves a transaction request.
• lnapprovals(uint _lnID): Approves a loan request.
• executetxn(uint _txid): Executes an approved transaction.
• raiseloanrequest(uint _amount, bytes calldata _data): Initiates a loan request from the shared pool.
• approveloan(uint _lnid): Approves a loan request.
• repayloan(uint _lnid): Repays a loan with interest.
• deposit(): Allows signers to deposit funds into the shared pool.

Internal Functions

• gettotalamount(): Calculates the total amount of funds in the shared pool.
• getapproval(uint _txid): Gets the number of approvals for a transaction.
• getlnapprovals(uint _lnID): Gets the number of approvals for a loan.

Events

• SignerAdded(address indexed signer): Triggered when a new signer is added.
• SignerRevoked(address indexed signer): Triggered when signer privileges are revoked.
• TransactionRaised(uint indexed txid, address indexed from, address indexed to, uint amount, bytes data): Triggered when a transaction is raised.
• TransactionApproved(uint indexed txid, address indexed signer): Triggered when a transaction is approved.
• TransactionExecuted(uint indexed txid, address indexed from, address indexed to, uint amount, bytes data): Triggered when a transaction is executed.
• LoanRequested(uint indexed lnid, address indexed borrower, uint amount, bytes data): Triggered when a loan is requested.
• LoanApproved(uint indexed lnid, address indexed borrower, uint amount, bytes data): Triggered when a loan is approved.
• LoanRepaid(uint indexed lnid, address indexed borrower, uint amount): Triggered when a loan is repaid.
• DepositReceived(address indexed sender, uint amount): Triggered when funds are deposited into the shared pool.

Getting Started

To deploy the contract and interact with it, follow these steps:

1. Setup Environment: Ensure you have a Solidity development environment set up, including a compatible compiler and a suitable development network.
2. Compile Contract: Compile the mutlisiglend.sol Solidity file using your preferred compiler.
3. Deploy Contract: Deploy the compiled contract to your chosen development network or blockchain platform.
4. Interact with Contract: Use provided functions and events to interact with the contract, including raising transactions, approving transactions, requesting loans, approving loans, and repaying loans.

Usage Examples

Here are some example interactions with the contract:

1. Raising a Transaction: Lenders or borrowers can raise transactions to deposit or withdraw funds from the shared pool.
2. Approving a Transaction: Signers can approve transactions initiated by lenders or borrowers.
3. Requesting a Loan: Borrowers can request loans from the shared pool, specifying the loan amount and terms.
4. Approving a Loan: Signers can approve loan requests initiated by borrowers.
5. Repaying a Loan: Borrowers can repay loans with interest, ensuring timely repayment and maintaining the integrity of the lending system.

NOTICE

1. PLEASE NOTE THAT THIS SMART CONTRACT WAS WRITTEN TO SHOW MY DEVELOPMENT SKILLS. IF DEPLOYED ON THE MAINNET AND LOSSES ARE INCURRED I AM NOT RESPONSIBLE.
2. ALSO IF YOU ARE NOT SURE HOW TO DEPLOY A SMART CONTRACT OR SET UP A WALLET PLEASE REFER TO MY MULTISIG WALLET SMART CONTRACT CODE [https://github.com/albertisaac12/MultiSigWallet]
3. FOR ANY QUERIES PLEASE FEEL FREE PING ME ON LINKEDIN [https://www.linkedin.com/in/abhigadipalli/]