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Chainlink The-graph Composite Adapter

The Graph adapter is a generic adapter to query information from The Graph. It currently only supports fetching prices from the Uniswap subgraph.

Configuration

The adapter takes the following environment variables:

Required? Name Description Options Defaults to
✅ [NETWORK]_RPC_URL The RPC Url to connect to (e.g. "ETHEREUM_RPC_URL")
UNISWAP_V2_SUBGRAPH_ENDPOINT The Uniswap V2 subgraph endpoint https://api.thegraph.com/subgraphs/name/ianlapham/uniswapv2

Running

See the Composite Adapter README for more information on how to get started.

Input Params

Required? Name Description Options Defaults to
method What data type to query for price price
✅ baseCoinTicker, base, from, coin The symbol of the base currency
✅ quoteCoinTicker, quote, to, market The symbol of the quote currency
theGraphQuote The symbol of the quote currency. This will override quoteCoinTicker if supplied
intermedaryToken An intermediary token to use if the base and quote coin pair does not exist in the DEX. WETH
✅ dex The DEX to query data from UNISWAP
referenceContract The smart contract address of a price feed. This is used if the price from fetched from the DEX needs to be modified
referenceContractDivisor How much the value from the referenceContract needs to be multiplied or divided by
referenceModifierAction Whether to multiply or divide the DEX result by the result from the referenceContract multiply, divide multiply
network The blockchain network to use. 'ETHEREUM'

Sample Input

{
  "jobRunId": 1,
  "data": {
    "baseCoinTicker": "UNI",
    "quoteCoinTicker": "LINK",
    "dex": "UNISWAP"
  }
}

Sample Output

{
  "jobRunID": "1",
  "result": "0.9794765982638552441956712315789272",
  "statusCode": 200,
  "data": {
    "result": "0.9794765982638552441956712315789272"
  }
}

Sample Input to fetch the price of USD/UNI

This request will first fetch the price of USDT/UNI from the Uniswap subgraph, fetch the price of USDT/USD using the price feed at the referenceContract and then combine the two to get the price of USD/UNI.

{
    "jobRunId": 1,
    "data": {
        "baseCoinTicker": "UNI",
        "quoteCoinTicker": "USDT",
        "referenceContract": "0x3E7d1eAB13ad0104d2750B8863b489D65364e32D",
        "referenceContractDivisor": "100000000",
        "referenceModifierAction": "divide",
        "dex": "UNISWAP
    }
}

Sample Output

{
  "jobRunID": "1",
  "result": 18.889804922939742,
  "statusCode": 200,
  "data": {
    "result": 18.889804922939742
  }
}

Sample Input to fetch the price of LINK/SUSHI

There currently isn't a pool for LINK/SUSHI in Uniswap so the price needs to be determined through an intermediary token that has a pair with both the base and quote tokens. In this example, the adapter will first fetch the price of SUSHI/WETH and LINK/WETH and then combine the two to get the final result.

{
  "jobRunId": 1,
  "data": {
    "baseCoinTicker": "SUSHI",
    "quoteCoinTicker": "LINK",
    "intermediaryToken": "WETH", // Defaults to WETH,
    "dex": "UNISWAP"
  }
}

Sample Output

{
  "jobRunID": "1",
  "result": 0.4050148172415684,
  "statusCode": 200,
  "data": {
    "result": 0.4050148172415684
  }
}