https://github.com/critesjosh/contract_spending_cusd

Simple app to demo how to use a contract to spend cUSD on a users behalf.
https://github.com/critesjosh/contract_spending_cusd

Last synced: 18 days ago
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Simple app to demo how to use a contract to spend cUSD on a users behalf.

• Host: GitHub
• URL: https://github.com/critesjosh/contract_spending_cusd
• Owner: critesjosh
• License: apache-2.0
• Created: 2021-10-19T21:35:08.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2021-10-19T23:54:19.000Z (about 3 years ago)
• Last Synced: 2024-10-29T07:41:08.392Z (2 months ago)
• Language: JavaScript
• Size: 1.41 MB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Spending cUSD from another Solidity Contract

Simple app to demo how to use a contract to spend cUSD on a users behalf.

## Spending cUSD on behalf of users

This example demonstrates how a contract can be designed to spend cUSD for a user. View the simple contract in `./contracts/cUSD_spender.sol`. This contract is too simple to be useful, but demonstrates the necessary concepts, namely how to access the cUSD contract from another Solidity contract.

Before the cUSD_spender contract can spend cUSD on behalf of a user, the user must approve the contract to spend cUSD for them. The `./webpage` directory shows how you can do this. Essentially, in the UI the dapp will request a transaction from the user, to the cUSD contract, calling the `approve` function for the desired amount. Once the `approve` transaction is confirmed, the dapp can request to `send` cUSD from the user's account.

## Get Started

1. Run yarn install in the project root.

2. Run `node createAccount.js`. This will print new Celo account details. Copy the private key for your new account into the PRIVATE_KEY variable in .env.

3. Fund the account address on the Alfajores testnet here: https://celo.org/developers/faucet

4. Deploy your own cUSD_spender contract to the Alfajores testnet with `truffle migrate --network alfajores`

5. Move into the `./webage` directory. Run `yarn` to install the dependencies.

6. Run the web server with `yarn dev`.