Digital Certification Over Blockchain

An Decentralised Autonomous Organisation build using Solidity for Smart Contracts and Flutter for the front-end for creating and verifying certificates with the feature to vote in new issuers of certificates. The smart contract can be deployed on any EVM based chain.

Installation

1. Clone the repository

git clone [email protected]:AlphaArtrem/dcob.git

2. Install truffle

cd contracts
npm install -g truffle

3. Install node dependencies

npm install

4. Compile the smart contract

truffle compile

5. Create a new file .secret in same directory and add your 12 words mnemonic in the file.

touch .secret

6. Open the file truffle-config.js and change the deployment network settings with the desired chain configurations and then deploy the contract.

truffle migrate –-network deployment

7. Save the contract address after deployment.

1_deploy_contracts.js
=====================

   Deploying 'Certificate'
   -----------------------
   > transaction hash:    0xdad633bceec116a67530f0097aeda9efab3a7ace684fb4b4991eebe20702c0a0
   > Blocks: 0            Seconds: 0
   > contract address:    0x601565cDC1e0A9079AD8508E18f16e2E173042A5***
   > block number:        5
   > block timestamp:     1684404758
   > account:             0xe7F8bd83F0a2BddaCCFB056D431134d44FF02033
   > balance:             99.980996372942756496
   > gas used:            3202532 (0x30dde4)
   > gas price:           3.076621899 gwei
   > value sent:          0 ETH
   > total cost:          0.009852980083448268 ETH

   > Saving artifacts
   -------------------------------------
   > Total cost:     0.009852980083448268 ETH

Summary
=======
> Total deployments:   1
> Final cost:          0.009852980083448268 ETH

8. Install and setup flutter using the docs here.
9. In the asset's folder rename the env_dummy.json file to env.json and the fill all the required JSON data.

{
    "ipfsInfuraApiKey" : "ipfsInfuraApiKey",
    "ipfsInfuraApiSecretKey" : "ipfsInfuraApiSecretKey",
    "contractAddress" : "contractAddress",
    "rpcUrl" : "rpcUrl"
}

You can get the Infura key and secret from infura.io. The contract address will be provide in the step 7. RPC URL will be your chain's rpc url.

10. Fetch pub dependencies for Flutter and run the app.

flutter pub get
flutter run