Borrow Smart Contract

Overview

The Borrow smart contract is designed to facilitate loans using an ERC-20 token as collateral. Users can take out loans based on their staked tokens, and the contract manages loan terms, payments, and the ability to deny users under certain circumstances.

Contract Structure

Dependencies

The Borrow contract depends on two other contracts:

• MyToken: An ERC-20 token contract used for managing token transactions.
• Stake: A staking contract that manages user stakes.

Constructor

constructor(address addrStake)

• Initializes the Borrow contract with an instance of the Stake contract.
• Sets the MyToken instance by retrieving the token address from the Stake contract.

Modifiers

• onlyOwner: Restricts function access to the owner of the MyToken.

Enums

Enum Name	Values	Description
LoanStatus	PaidOut, NotPay	Represents the current status of a loan.
ReasonDeny	PaymentLate, BadConduct, Others	Reasons for denying a user from taking out a loan.

State Variables

Variable Name	Type	Description
stakeInstance	StakeInstance	Instance of the staking contract
myToken	MyToken	Instance of the token contract
userLoans	mapping	Stores loan details for each user
userDeny	mapping	Tracks whether a user has been denied loans
VALUEVERIFYMIN	uint256	Minimum amount for loan verification (set to 200)
VALUEVERIFYMED	uint256	Medium amount for loan verification (set to 200)
VALUEVERIFYMAX	uint256	Maximum amount for loan verification (set to 500)

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Foundry

Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust.

Foundry consists of:

• Forge: Ethereum testing framework (like Truffle, Hardhat and DappTools).
• Cast: Swiss army knife for interacting with EVM smart contracts, sending transactions and getting chain data.
• Anvil: Local Ethereum node, akin to Ganache, Hardhat Network.
• Chisel: Fast, utilitarian, and verbose solidity REPL.

Documentation

https://book.getfoundry.sh/

Usage

Build

$ forge build

Test

$ forge test

Format

$ forge fmt

Gas Snapshots

$ forge snapshot

Anvil

$ anvil

Source Environment

source .env

Deploy

$ forge script script/Deploy.s.sol:DeployScript  --rpc-url <your_rpc_url> --private-key <your_private_key>

Cast

$ cast <subcommand>

Help

$ forge --help
$ anvil --help
$ cast --help