zbank_payroll

A crypto payroll back office built on the internet computer.

Prerequisites

Downloaded and installed Node.js.
Downloaded and installed Angular.
Downloaded and installed the DFINITY Canister SDK.
Downloaded Bitcoin Node
Remember to stop any Internet Computer or other network process that would create a port conflict on 4943.

Demo

Environment preparation

Start Bitcoin local node

./bin/bitcoind -conf=$(pwd)/bitcoin.conf -datadir=$(pwd)/data --port=18444

Start ICP local network

dfx start --clean --background --enable-bitcoin

Deploy the project on ICP local network

backend

cargo update
dfx deploy zbank_payroll_backend

bitcoin

dfx deploy zbank_bitcoin --argument '(variant { Regtest })'

frontend (We use Angular to build)

dfx generate zbank_bitcoin
dfx generate zbank_payroll_backend
cd src/canister/frontend
npm install
dfx canister create zbank_payroll_frontend
ng build
dfx deploy zbank_payroll_frontend

You can also use ng serve to start frontend server without deploy on ICP.

Usefule Bitcoin commands

mining

./bin/bitcoin-cli -conf=$(pwd)/bitcoin.conf generatetoaddress <number-of-blocks> <address>

check mem pool

./bin/bitcoin-cli -conf=$(pwd)/bitcoin.conf getrawmempool

Create wallet

./bin/bitcoin-cli -conf=$(pwd)/bitcoin.conf -regtest createwallet "<wallet_name>"

Load wallet

./bin/bitcoin-cli -conf=$(pwd)/bitcoin.conf loadwallet "<wallet_name>"

Unload wallet

./bin/bitcoin-cli -conf=$(pwd)/bitcoin.conf unloadwallet "<wallet_name>"

Get new wallet address

./bin/bitcoin-cli -conf=$(pwd)/bitcoin.conf getnewaddress "<wallet_name>" "legacy"

Reset environment

Clear Bitcoin local node
```
rm -rf data/regtest/
```
Clear ICP local network
```
rm -rf .dfx
```

Trouble Shooting

Hint, If you're trying to send a transaction and the transaction isn't being mined, try sending the same transaction via bitcoin-cli.

./bin/bitcoin-cli -conf=$(pwd)/bitcoin.conf sendrawtransaction <tx-in-hex>

bad-txns-premature-spend-of-coinbase: Coinbase is the inputless transaction created when a new block is mined and given to the miner, and must have 100 confirmations before that reward can be spent.

Todo

Make data persistent (preupgrade and postupgrade)
Deploy on ICP main network
Support other networks like ETH, TRON, etc.
Design business model to cover cycle costs
Add network fee and platform fee features
Add IAM(Identity Access Management) and RBAC(role-based access control)

Next Roadmap

Unsecured Loan: With transaction data on the payroll back office, we can provide credit rating for companies, and build the next product to link them with investors.

icp-hackathons/zbank_payroll