ERC20-Swap

This is a Ethereum Sample dApp which comes with few pre-deployed ERC20 based smart contracts. Few of the Ethereum Accounts are are pre-supplied with tokens to get started.

Features

• Transfer two types of ERC20 based Tokens across accounts
  • GST and SCT
• Swap Tokens among these two types with customizable rate
  • SCT to GST
  • GST to SCT

Pre-requisites

• VMware Blockchain has been deployed
• Suggested and Supported Stack
  • MAC Operating System
  • Google Chrome browser
  • Metamask Wallet - https://metamask.io/
• Setting up Metamask for VMware Blockchain
  • Connecting Metamask to VMware Blockchain- See Appendix
  • Reset Metamask Accounts - See Appendix

Running dApp

There are two ways to run this dApp

Command Line Based

• This option is only supported for MAC Operating System
• Execute following commands to run the dApp through command line
• At command line, this app defaults to port 3000

# Change to Source Directory of ERC20-Swap dApp
cd vmware-blockchain-samples/vmbc-ethereum/sample-dapps/erc20-swap/source/erc20-swap

# Install the dependencies
npm install

# Export the VMBC_URL to the URL of deployed instance of VMware Blockchain
export VMBC_URL=http://127.0.0.1:8545

# Run the dApp
npm run start

The dApp website will be available on http://localhost:3000

Helm Based

Follow the instructions in helm-chart/README

Using dApp

The accounts mentioned in Accounts with Tokens are pre-supplied with tokens. You can use this guide in Appendix to import these accounts into your Metamask wallet.

Transfer Tokens

• Select a token from drop down
• Enter address of an Ethereum Account to which to transfer the tokens
• Enter the amount of tokens to send
• Click on TRANSFER button
• Interact with Metamask Pop Up Window to complete this Transaction

Swap Tokens

• The Token selected on the top of the page acts as From Type for the Swap
• Select the Token to Swap to
• Enter the amount to swap
• Click on SWAP button
• Interact with Metamask Pop Up Window to complete this Transaction