Testing

This is the src dir

How to test the truffle node.

Deploying a Contract on a local node

• Install a truffle
  

  • npm install -g truffle
    

• Initialize a new truffle project

  • truffle init
    

• To deploy, we need a blockchain so we fork ganache.

  • npm install -g @celo/ganache-cli

• Start ganache

  • ganache-cli --port 7545

• Deploy the contract to the local network

  • truffle migrate --network test

• Interact with the contract via the truffle console

  • truffle console --network test

• Add truffle-assertions

  • npm install truffle-assertions

Deploying a Contract to Alfajores

• When deploying to Alfajores, we'll need a Celo client.
  • export CELO_IMAGE=us.gcr.io/celo-org/geth:alfajores
• Use a Docker image containing the Celo node software
  • docker pull $CELO_IMAGE
• Set up a data directory
  • mkdir celo-data-dir
  • cd celo-data-dir

More detailed instructions can be found below

• Deloy a Contract in Celo

Problems we encountered

• Start ganache

  • Command: ganache-cli --port 7545
  • Error: Callback was already called.
  • Potential reason: ganache is not compatible with newer version of node
  • Solution: download Ganache from official website, open and click Quickstart. It should have the same effect as the command

• Run docker

  • Command: any docker command that specifies a path
  • Error: docker: invalid reference format: repository name must be lowercase.
  • Solution: surround the path with quotation mark

• Start the node

  • Command: docker run --name celo-ultralight-node ......
  • Error: docker: Error response from daemon: driver failed programming external connectivity on endpoint celo-ultralight-node (<YOUR-ACCOUNT-ADDRESS>): Bind for 127.0.0.1:8545 failed: port is already allocated.
  • Environment: port 8545 is not allocated before running the command
  • Potential reason: docker fail to reinitialize
  • Solution: restart docker

• Migrate to Alfajores

  • Command: truffle migrate --network alfajores
  • Error: *** Deployment Failed *** "Bolt" -- Returned error: invalid argument 0: json: cannot unmarshal hex string without 0x prefix into Go struct field SendTxArgs.gas of type hexutil.Uint64. at /usr/local/lib/node_modules/truffle/build/webpack:/packages/deployer/src/deployment.js:365:1
  • Potential reason: newer version of truffle is not compatible with alfajores
  • Solution (from Celo Discord): change the version of truffle from 5.4.14 to 5.4.0 with commands npm uninstall -g truffle and npm install -g [email protected]