The capstone will build upon the knowledge you have gained in the course in order to build a decentralized housing product.
Navigate to folder app to run the frontend
yarn run dev
Open the app from chrome browser (as tested) by typing http://localhost:8080/ in the url.
Click on Choose File then pick one of the already generated proofs in the proofs folder.
Click on Add Solution to add that proof to the smart contract. Note that the account adding that proof shall be the owner of the token provided it is minted successfully.
The hash of the added solution is shown in the footer of the page
Solution Key added is <HASH_OF_CHOSEN_PROOF> Copy it in the minting section to mint this new token
Copy <HASH_OF_CHOSEN_PROOF> and paste it into the input field before minting the token. Note that the owner of the smart contract is the only account address allowed to mint tokens.
Contract is required to be tested before deploying into the infura network
First, navigate to eth-contracts to create a local blockchain network,
in the terminal, type
truffle develop
then test the compiled contracts artifacts by typing
truffle test
which shows all the tests running successfully without issues
truffle(develop)> truffle test
Using network 'develop'.
Compiling your contracts...
===========================
> Everything is up to date, there is nothing to compile.
Contract: PropertySellerCoin
match erc721 spec
✓ should return total supply (48ms)
✓ should get token balance
✓ should return token uri
✓ should transfer token from one owner to another (113ms)
have ownership properties
✓ should fail when minting when address is not contract owner (73ms)
✓ should return contract owner (146ms)
Contract: SolnSquareVerifier
Initialize Soln Square Verifier Contract
✓ Contract deployment (188ms)
✓ Test if a new solution can be added (2186ms)
✓ Ensuring that contract reverts when adding an existing proof (1735ms)
key
0x16621c518ef438ef6ce0dba157c2e287cc57d21eaeaf141596c65571471cb5d0
✓ Test if an ERC721 token can be minted (208ms)
✓ Test that solution can not be used again (62ms)
✓ Ensuring that contract reverts when key for non-existing solution is used (57ms)
Contract: Verifier
Initialize Verifier Contract
✓ Test verification with correct proof (875ms)
✓ Test verification with incorrect proof (863ms)
14 passing (12s)
In the terminal, in the eth-contracts local directory type
truffle migrate --network rinkeby
From which contracts are deployed from the infura node registered, then returns the addresses and the abis of the deployed contracts SolnSquareVerifier and Verifier
SolnSquareVerifier: "0x19Fd90328831A37475601F50b1080226A3079916"
Verifier: 0x84C313734Cb55313620736b4AD3BD062475C4386
/eth-contracts/build/contracts/SolnSquareVerifier.json
/eth-contracts/build/contracts/Verifier.json
NB: It is preferred to delete the content of the eth-contracts/build directory before initiating this step
Tokens can be found listed in opensea https://rinkeby.opensea.io/assets/propertycoin-v3.
Ten tokens have been minted by account0 who is also the owner of the contract.
The following shows the steps being carried out to sell tokens to account1.
First, token is listed for sale by account0. Click on sell then choose price
At this step account1 goes on to buy the token
Finally, account1 is shown to own 5 tokens after redoing the previous steps for the other tokens
