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Udacity Blockchain Capstone

This is my capstone as a final udacity project for blockchain developer nanodegree in order to build a decentralized housing product.

Problem Statement

  • Nowsaday, in real estate business, house listing service is still based on paper which create a lot of error and fraud.
  • 25% defect and higher legal fee
  • In emerging country, we find it difficult to identify the land ownership.

Requirement

  • Title management process in house listing service
  • Mint new token
  • Using zk-SNARK to cope with verification without expose the sensitive information in public
  • OpenSea is adopt as a marketplace

Test Result

truffle test

test result

Deployed Contract (Rinkeby)

  • Verifier: 0x5159fDD670DA5F5334cf37e041414b38Bd3a9308
  • SolnSquareVerifier: 0x8883cCc302E8f782B9775111c89b72f2f0be1DE0

Token Minted

  • 0xf699e0d83bad29e0f5169e94d9d0011b20b0b48826834651f08b4c1fc856274d
  • 0x13d8fc6ba4d4c1bfd4ef1be6168bf5d3be1a26670f897adc7be9c66744ca34b9
  • 0x57656312456522dff902bb4d299b839baecce0e7411de9def875b84409f7c321
  • 0x8010b39bb1001070b16273677ac40c7dcf6696938694a9b2b4707c0dfa3f68fd
  • 0xe317b386147deef4b5dbc937220f10701ab781da1a883084375daea0ef816ac6

via https://v5.myetherwallet.com/interface/interact-with-contract

OpenSea

Store Front Link: https://testnets.opensea.io/collection/pggtoken

Purchase Transaction:

  • 0xebb1a524fc363d69661dd19f6bb2eae69a70677188605f2f41126dca4e5b7324
  • 0x6ef3cf9fb106cbba474e37b21523b0ad13d423df2802abac112b3b1dc6e9ef5d
  • 0x53af3366b32eb779948018927b08feb2ac6f7cec565a06e3023bd5c0911b3bfc
  • 0xbe39672bb052fc900ae2c688f5a0f5961e2a62842d75820b2bb20996f729a0e9
  • 0xb83b6621c70eb4df50b2bf5ee972a625067c2f4a2969f8ce49da6d876a8a601b

Project Resources

ABI

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