The ERC20 Variable Incentive is a protocol incentive that allows for a variable distribution of native and ERC-20 assets, with each claim amount being determined dynamically at claim time. On Boost creation, a predetermined amount of the specified asset is transferred into this incentive from the associated budget.
The Boost V2 Docs are under active development and will be subject to changes.

Smart Contract

Read the smart contracts

Typedoc

See technical documentation

SDK Implementation

See the source

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Key Features

  • Supports native assets as well as any ERC20
  • Rewards dynamic at claim time
Unlike budgets, allowlists, and validators, incentives cannot be re-used between multiple Boosts.

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Create a new ERC20VariableIncentive

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.ERC20VariableIncentive({
      asset: '0xERC20' || zeroAddress, // use zero address for native assets
      reward: parseEther('0.5'), // Amount to multiply a claim amount by, if 0n or 1 ether, user will be transferred the whole amount asserted at claim time.
      limit: parseEther('1'), // The total budget allocated to this incentive
    }),
  ],
});

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Get an existing ERC20VariableIncentive

// if an incentive address is known, directly construct it
const incentive = core.ERC20VariableIncentive("0xc55F719709bDad022B320E76f9DfF7e6F5680767")

// or if you want a budget from a specific chain
const incentiveOnBase = core.ERC20VariableIncentive(
  "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 ERC20VariableIncentive)

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Sign a claim amount

// Get the index of the incentive to claim
const incentiveIndex = boost.incentives.findIndex(incentive => incentive instanceof ERC20VariableCriteriaIncentive)

// build claim data, signing a variable amount for the incentive
const allClaimData = boost.incentives.map(incentive => {
  if (incentive instanceof ERC20VariableIncentive || incentive instanceof ERC20VariableCriteriaIncentive) {
    const rewardAmount = parseUnits("10", 18);
    return incentive.buildClaimData(rewardAmount);
  } else {
    return ''
  }
})

// Sign a valid transaction with the variable reward amount
const { data } = await axios.get('/signatures', {
  params: {
    boostId: `${chainId}:${boostCoreAddress}:${boost.id}`,
    txHash,
    claimData: allClaimData.join(',')
  }
});

// claim the ERC20VariableIncentive
const { signature, incentiveId, claimant } = data.at(incentiveIndex);
await core.claimIncentive(
  boost.id,
  incentiveId,
  claimant,
  signature,
);