> ## Documentation Index
> Fetch the complete documentation index at: https://docs.boost.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Learn about how to interact with a Continuous Gradual Dutch Auction Incentive using the SDK

The Continuous Gradual Dutch Auction Incentive is a protocol incentive that allows for rewards that adjust dynamically based on claim volume. [See this document for more information on gradual dutch auctions](https://moallemi.com/ciamac/papers/pricing-dutch-auctions-2024.pdf). On Boost creation, the incentive's total budget of the specified asset is transferred into this incentive from the associated budget.

<Warning>
  The One-Time Actions docs are under active development and will be subject to changes.
</Warning>

<CardGroup cols={3}>
  <Card title="Smart Contract" icon="file-contract" href="https://github.com/boostxyz/boost-protocol/blob/main/packages/evm/contracts/incentives/CGDAIncentive.sol">
    Read the smart contracts
  </Card>

  <Card title="Typedoc" icon="file-lines" href="https://sdk.boost.xyz/classes/CGDAIncentive.html">
    See technical documentation
  </Card>

  <Card title="SDK Implementation" icon="file-code" href="https://github.com/boostxyz/boost-protocol/blob/main/packages/sdk/src/Incentives/CGDAIncentive.ts">
    See the source
  </Card>
</CardGroup>

## Key Features

* Supports native assets as well as any ERC20
* Rewards programmatically decline after each claim
* Rewards programmatically increase each hour without a claim

<Info>
  Unlike budgets, allowlists, and validators, incentives cannot be re-used between multiple Boosts.
</Info>

### Create a new CGDAIncentive

<CodeGroup>
  ```ts index.ts theme={null}
  import { BoostCore } from '@boostxyz/sdk/BoostCore'
  import { config } from "./config";

  const core = new BoostCore({ config });

  await core.createBoost({
    maxParticipants: 10n,
    budget,
    action,
    allowList,
    incentives: [
      core.CGDAIncentive({
        asset: '0xERC20', // The address of the underlying asset, or zeroAddress for native token
        initialReward: 5n, // The initial amount for the first claim
        totalBudget: 10n, // The total amount distributable by this incentive
        rewardBoost: 1n, // How much to increase the reward each hour
        rewardDecay: 1n, // How much to subtract from the reward each hour
        manager: '0xBUDGET_ADDRESS',
      }),
    ],
  });
  ```

  ```ts config.ts theme={null}
  import { http, createConfig } from '@wagmi/core'
  import { mainnet, sepolia } from '@wagmi/core/chains'

  export const config = createConfig({
    chains: [mainnet, sepolia],
    transports: {
      [mainnet.id]: http(),
      [sepolia.id]: http(),
    },
  })
  ```
</CodeGroup>

### Get an existing CGDAIncentive

<CodeGroup>
  ```ts index.ts theme={null}
  // if an incentive address is known, directly construct it
  const incentive = core.CGDAIncentive("0xc55F719709bDad022B320E76f9DfF7e6F5680767")

  // or if you want a budget from a specific chain
  const incentiveOnBase = core.CGDAIncentive(
    "0xc55F719709bDad022B320E76f9DfF7e6F5680767",
    { chainId: 8453 }
  )

  // or accessible off of a a pre-exiting Boost
  const boost = await core.getBoost(0n)
  const incentive = boost.incentives.find(incentive => incentive instanceof CGDAIncentive)
  ```
</CodeGroup>