Verifiable Sealed-bid Auction on Ethereum Blockchain

This is the accompanying code for the article "Verifiable Sealed-bid Auction on Ethereum Blockchain" to be published at Trusted Smart Contracts workshop 2018. It consists of:

• Two Solidity contracts: Auction and Pedersen
• C# Console application for interaction with these contracts

Setup a Private Blockchain

1. Install Ethereum client Geth 1.7.3 or higher.
2. Create a new directory on your drive to contain the private blockchain
3. Copy the genesis.json file to that directory
4. Open cmd/powershell/terminal and switch to the directory
5. Execute geth --datadir <directory_name> init genesis.json
6. Execute geth --datadir <directory_name> --networkid 300 --rpc --rpcaddr "127.0.0.1" --port "8545" --rpccorsdomain "*" --rpcapi "eth,net,web3,admin,personal" console

Now your private blockchain is ready and it supports Byzantium added proposals. We need a set of accounts to act as bidders and auctioneer.

1. Execute personal.newAccount('123') to create new account with password 123.
2. After creating multiple accounts, we need to start mining some ethers on each account.

miner.setEtherbase(eth.accounts[0])
miner.start(4)
...
miner.stop()

3.Repeat the above commands but with different indexs 1, 2, ...

Testing the Auction

1. Build the Auctioneer C# project using Visual Studio 2017
2. Start the miner on geth console
3. Run the application and it will report a sequence of transactions starting from the deployment to finalizing the auction.
4. Inside, the Program.cs file you can find a list of auction parameters and their description. You can change them and rebuild the application to test the new effects.