transfers: add scripts and readme (#63 )

Co-authored-by: Daniel Gushchyan <d.gushchyan@gmail.com>
Co-authored-by: hu55a1n1 <sufialhussaini@gmail.com>
Co-authored-by: David Kajpust <kajpustd@gmail.com>
Co-authored-by: Daniel Gushchyan <39884512+dangush@users.noreply.github.com>

2024-06-28 14:56:50 +04:00

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Transfers

This is a simple Quartz demo app. It allows users to deposit funds to a contract, transfer them around privately within the contract's encrypted state, and withdraw whatever funds they have.

Run

First set the NODE_URL variable to the address of the blockchain node. If it's a local node, set it to localhost:26657. If it's a remote node, set it to that node's address.

The scripts dir contains some bash scripts to help run the app. These scripts should be replaced by a new quartz tool. See issue.

Build the Binaries

Build the enclave binary and the smart contract binary:

bash scripts/build.sh

Configure and Run Gramine

Setup and sign the Gramine config, and then start the gramine process, which will run the grpc server that hosts the transfer application.

bash scripts/start.sh

The enclave binary is now running, waiting for commands.

Contract Setup

With the enclave running in one window, open another window to deploy the contract and start the listener.

In the new window, set the NODE_URL env variable again (eg. export NODE_URL=143.244.186.205:26657)

Now we can deploy the contract:

bash scripts/deploy.sh

Note the deployed contract address and save it into the CONTRACT env variable.

Now run the quartz handshake between contract and enclave:

bash scripts/handshake.sh $CONTRACT

This should output the pubkey and nonce.

Run the Listener

Finally, we're ready to listen to events from the contract and trigger execution on the enclave:

bash scripts/listen.sh $CONTRACT

Now we can interact with the contract, and we'll see the events and contract data come through.

Run the Frontend

Now on your own machine, checkout the https://github.com/informalsystems/cycles-hackathon-app.

Make sure to create a .env.local file and set the contract address and TEE pubkey (see the output from init.sh and handshake.sh). For example:

#.env.local
NEXT_PUBLIC_TRANSFERS_CONTRACT_ADDRESS=wasm1ch9ed27cdu3a4fkx37gnagm7jcthj0rggnmmjwwwe4xhwmk0d65q8fn9pz
NEXT_PUBLIC_ENCLAVE_PUBLIC_KEY=030c25e39743fd4c7553d87873919281d567b5c328fb903cbfbe9541518736a2d2

Install and run the app:

npm install -f
npm run dev

Note the frontend app is currently hardcoded to talk to our remote digital ocean node.

Make sure you have Keplr installed in your browser and you should now be able to use the app!

You may have to go to "Manage Chain Visibility" in Keplr settings to add the My Testing Chain.

Then you should be able to deposit, transfer, and withdraw using different Keplr accounts. And everything will get processed automatically by the transfer.sh script we have running on the enclave host!

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