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Getting Latest Pairs

Latest Trading Pairs for a DEX​

Let's see how we can get latest trading pairs created on DEXs. In this example we use Smart Contract Events to track PoolCreated event for Uniswap v3 factory contract. Because whenever a new pool gets created Uniswap v3 factory contract emits a PoolCreated event with the details of the pool. 

{
  EVM(dataset: combined, network: eth) {
    Events(
      orderBy: {descending: Block_Number}
      limit: {count: 10}
      where: {Log: {SmartContract: {is: "0x1f98431c8ad98523631ae4a59f267346ea31f984"}, Signature: {Name: {is: "PoolCreated"}}}}
    ) {
      Log {
        Signature {
          Name
          Parsed
          Signature
        }
        SmartContract
      }
      Transaction {
        Hash
      }
      Block {
        Date
        Number
      }
      Arguments {
        Type {
          Name
        }
        Value {
          String
        }
      }
    }
  }
}

Open this query on our GraphQL IDE using this link.

Subscribe to the Latest Pairs for Uniswap V3​

You can use our GraphQL Subscription (Webhook) to subscribe to these events in case you don't want to call our APIs periodically.

subscription {
  EVM(network: eth, trigger_on: head) {
    Events(
      orderBy: {descending: Block_Number}
      limit: {count: 10}
      where: {Log: {SmartContract: {is: "0x1f98431c8ad98523631ae4a59f267346ea31f984"}, Signature: {Name: {is: "PoolCreated"}}}}
    ) {
      Log {
        Signature {
          Name
          Parsed
          Signature
        }
        SmartContract
      }
      Transaction {
        Hash
      }
      Block {
        Date
        Number
      }
      Arguments {
        Type {
          Name
        }
        Value {
          String
        }
      }
    }
  }
}

Open this query on our GraphQL IDE using this link