Security Deposit

This contract acts as a trustee. The trustor transfers the agreed-upon sum to the contract for the benefit of the beneficiary. The design of the contract is guided by the way a security deposit works that is set up a renter (trustor) in favor of the landlord (beneficiary).

Rules:

• Only the trustor can transfer funds to the contract
• Only the trustor determines the beneficiary
• Once set, the beneficiary can not be changed
• Only the beneficiary can withdraw funds
• Upon termination, all funds are returned to the trustor
• Only the beneficiary can terminate the contract without waiting period
• The trustor can terminate the contract after a 30 day waiting period, if the beneficiary does not object
• No interests are accumulated on the funds

Prerequisites

The code was developed and tested with truffle. If you want to play around with the contract, I recommend to install truffle as well as testrpc.

Deploy to testrpc

testrpc
truffle migrate

Run the tests

truffle test

Interact with deployed contract

Start the truffle console

truffle console

Get the trustor

SecurityDeposit.deployed()
    .then((instance) => {return instance.trustor.call()})
    .then((res) => {console.log(res)})

Set the beneficiary

SecurityDeposit.deployed()
    .then((instance) => {instance.setBeneficiary(web3.eth.accounts[1])})

Transfer funds

SecurityDeposit.deployed()
    .then((instance) => {instance.sendFunds({from: web3.eth.accounts[0], value: 100, gas: 400000})})

Check the balance

SecurityDeposit.deployed()
    .then((instance) => {console.log(web3.eth.getBalance(instance.address))})