stack-orchestrator/app/data/stacks/erc721

ERC721 Watcher

Instructions to deploy a local ERC721 watcher stack (core + watcher) for demonstration and testing purposes using laconic-stack-orchestrator

Setup

• Clone / pull required repositories:

  $ laconic-so setup-repositories --include cerc-io/go-ethereum,cerc-io/ipld-eth-db,cerc-io/ipld-eth-server,cerc-io/watcher-ts --pull
  

• Build the core and watcher container images:

  $ laconic-so build-containers --include cerc/go-ethereum,cerc/go-ethereum-foundry,cerc/ipld-eth-db,cerc/ipld-eth-server,cerc/watcher-erc721
  

  This should create the required docker images in the local image registry.

• Deploy the stack:

  $ laconic-so deploy-system --include db,go-ethereum-foundry,ipld-eth-server,watcher-erc721 up
  

Demo

• Find the watcher container's id using docker ps and export it for later use:

  $ export CONTAINER_ID=<CONTAINER_ID>
  

• Deploy an ERC721 token:

  $ docker exec $CONTAINER_ID yarn nft:deploy:docker
  

  Export the address of the deployed token to a shell variable for later use:

  $ export NFT_ADDRESS=<NFT_ADDRESS>
  

• Open http://localhost:3009/graphql (GraphQL Playground) in a browser window

• Connect MetaMask to http://localhost:8545 (with chain ID 99)

• Export your MetaMask account (second account) address to a shell variable for later use:

  $ export RECIPIENT_ADDRESS=<RECIPIENT_ADDRESS>
  

• To get the primary account's address, run:

  $ docker exec $CONTAINER_ID yarn account:docker
  

  Export it to shell variable for later use:

  $ export PRIMARY_ADDRESS=<PRIMARY_ADDRESS>
  

• To get the current block hash at any time, run:

  $ docker exec $CONTAINER_ID yarn block:latest:docker
  

• Fire the following GQL query (uses eth_call) in the playground:

  query {
    name(
      blockHash: "LATEST_BLOCK_HASH"
      contractAddress: "NFT_ADDRESS"
    ) {
      value
      proof {
        data
      }
    }
  
    symbol(
      blockHash: "LATEST_BLOCK_HASH"
      contractAddress: "NFT_ADDRESS"
    ) {
      value
      proof {
        data
      }
    }
  
    balanceOf(
      blockHash: "LATEST_BLOCK_HASH"
      contractAddress: "NFT_ADDRESS"
      owner: "PRIMARY_ADDRESS"
    ) {
      value
      proof {
        data
      }
    }
  }
  

  Balance for the PRIMARY_ADDRESS should be 0 as the token is yet to be minted.

• Fire the following GQL query (uses storage calls) in the playground:

  query {
    _name(
      blockHash: "LATEST_BLOCK_HASH"
      contractAddress: "NFT_ADDRESS"
    ) {
      value
      proof {
        data
      }
    }
  
    _symbol(
      blockHash: "LATEST_BLOCK_HASH"
      contractAddress: "NFT_ADDRESS"
    ) {
      value
      proof {
        data
      }
    }
  
    _balances(
      blockHash: "LATEST_BLOCK_HASH"
      contractAddress: "NFT_ADDRESS"
      key0: "PRIMARY_ADDRESS"
    ) {
      value
      proof {
        data
      }
    }
  }
  

• Mint the token:

  $ docker exec $CONTAINER_ID yarn nft:mint:docker --nft $NFT_ADDRESS --to $PRIMARY_ADDRESS --token-id 1
  

  Fire the GQL query above again with latest block hash. The balance should increase to 1.

• Get the latest block hash and run the following GQL query in the playground for balanceOf and ownerOf (eth_call):

  query {
    fromBalanceOf: balanceOf(
      blockHash: "LATEST_BLOCK_HASH"
      contractAddress: "NFT_ADDRESS"
      owner: "PRIMARY_ADDRESS"
    ) {
      value
      proof {
        data
      }
    }
  
    toBalanceOf: balanceOf(
      blockHash: "LATEST_BLOCK_HASH"
      contractAddress: "NFT_ADDRESS"
      owner: "RECIPIENT_ADDRESS"
    ) {
      value
      proof {
        data
      }
    }
  
    ownerOf(
      blockHash: "LATEST_BLOCK_HASH"
      contractAddress: "NFT_ADDRESS"
      tokenId: 1
    ) {
      value
      proof {
        data
      }
    }
  }
  

  Balance should be 1 for the PRIMARY_ADDRESS, 0 for the RECIPIENT_ADDRESS and owner value of the token should be equal to the PRIMARY_ADDRESS.

• Transfer the token:

  $ docker exec $CONTAINER_ID yarn nft:transfer:docker --nft $NFT_ADDRESS --from $PRIMARY_ADDRESS --to $RECIPIENT_ADDRESS --token-id 1
  

  Fire the GQL query above again with the latest block hash. The token should be transferred to the recipient.

Clean up

• To stop all the services running in background:

  $ laconic-so deploy-system --include db,go-ethereum-foundry,ipld-eth-server,watcher-erc721 down