Cent.Dex_subgraph

The graphql schema is still under heavy development and will likely have major breaking changes.

Only the factory address is needed in subgraph.yaml, new pool addresses are automatically picked up using Graph Protocol's data source templates.

Setup

Prerequisites

• Global Yarn Packages
  • ganache-cli
  • truffle
  • graph-cli
• Docker

Services

Start a ganache chain using 0.0.0.0 as a host so docker can connect

ganache-cli -h 0.0.0.0 -d -l 4294967295 --allowUnlimitedContractSize

Run a local graph node

git clone https://github.com/graphprotocol/graph-node/

Update ethereum value in docker-compose.yml to ganache:http://host.docker.internal:8545

cd graph-node/docker

docker-compose up

To blow away graph-node settings

docker-compose kill && docker-compose rm -f && rm -rf data

Contracts

Deploy centswap contracts using truffle. Using the yarn deploy script in centswap-dapp also makes this easy to test out the subgraph using the frontend.

Subgraph

Clone the centswap subgraph

git clone [email protected]:centfinance/centswap-subgraph.git

Update factory address in subgraph.yaml to the one listed as part of the deploy

Install dependencies

yarn

Generate the graph code

yarn codegen

Create local node

yarn create:local

Deploy locally

yarn deploy:local

Any updates can be made to this repo and re-running yarn deploy:local without needing to re-initialize the environment.

Running Locally With Parity Kovan Node

Start Parity:

parity --chain=kovan --jsonrpc-interface=0.0.0.0

Update ethereum value in docker-compose.yml to kovan:http://host.docker.internal:8545

Comment out try_ functions in pool.ts LN52-64

cd graph-node/docker

docker-compose up

Create local node

yarn create:local

Deploy locally

yarn deploy:local

To blow away graph-node settings

docker-compose kill && docker-compose rm -f && rm -rf data

Queries

GraphiQL interface can be accessed on a dev env at: http://127.0.0.1:8000/subgraphs/name/centfinance/centswap-subgraph

List of pools

{
  pools {
    id
    controller
    publicSwap
    finalized
    swapFee
    totalWeight
    totalShares
    createTime
    joinsCount
    exitsCount
    swapsCount
    tokens {
      id
      poolId {
        id
      }
      address
      balance
      denormWeight
    }
    shares {
      id
      poolId {
        id
      }
      userAddress {
        id
      }
    }
  }
}

Pools with 2 tokens

{
  pools (where: {tokensList_contains: ["0x5b1869d9a4c187f2eaa108f3062412ecf0526b24", "0xcfeb869f69431e42cdb54a4f4f105c19c080a601"]}) {
    id
    publicSwap
    swapFee
    tokensList
    tokens {
      id
      address
      balance
      denormWeight
    }
  }
}