amm.burn

Burns liquidity tokens and receives the underlying token pair. Learn more about the Fee AMM

Usage

example.ts

import {  } from 'wagmi/tempo'
import {  } from 'viem'
import {  } from './config'

const { , ,  } =
  await ..(, {
    : ('10.5', 18),
    : '0x742d35Cc6634C0532925a3b844Bc9e7595f0bEbb',
    : '0x20c0000000000000000000000000000000000000',
    : '0x20c0000000000000000000000000000000000001',
  })

.('Received user tokens:', )
.('Received validator tokens:', )
Received user tokens: 5250000000000000000n
Received validator tokens: 5250000000000000000n

config.ts

import { createConfig, http } from 'wagmi'
import { tempoTestnet } from 'wagmi/chains'
import { KeyManager, webAuthn } from 'wagmi/tempo'

export const config = createConfig({
  connectors: [
    webAuthn({
      keyManager: KeyManager.localStorage(),
    }),
  ],
  chains: [tempoTestnet],
  multiInjectedProviderDiscovery: false,
  transports: {
    [tempoTestnet.id]: http(),
  },
})

Asynchronous Usage

The example above uses a *Sync variant of the action, that will wait for the transaction to be included before returning.

If you are optimizing for performance, you should use the non-sync amm.burn action and wait for inclusion manually:

import { Actions as viem_Actions } from 'viem/tempo'
import { Actions } from 'wagmi/tempo'
import { waitForTransactionReceipt } from 'wagmi/actions'
import { parseUnits } from 'viem'

const hash = await Actions.amm.burn(config, {
  liquidity: parseUnits('10.5', 18),
  to: '0x742d35Cc6634C0532925a3b844Bc9e7595f0bEbb',
  userToken: '0x20c0000000000000000000000000000000000000',
  validatorToken: '0x20c0000000000000000000000000000000000001',
})
const receipt = await waitForTransactionReceipt(config, { hash })

const { args: { amountUserToken, amountValidatorToken } } 
  = viem_Actions.amm.burn.extractEvent(receipt.logs)

Return Type

type ReturnType = {
  /** Amount of user tokens received */
  amountUserToken: bigint
  /** Amount of validator tokens received */
  amountValidatorToken: bigint
  /** Amount of liquidity tokens burned */
  liquidity: bigint
  /** Transaction receipt */
  receipt: TransactionReceipt
  /** Address that initiated the burn */
  sender: Address
  /** Address that received the underlying tokens */
  to: Address
  /** Address of the user token */
  userToken: Address
  /** Address of the validator token */
  validatorToken: Address
}

Parameters

liquidity

• Type: bigint

Amount of LP tokens to burn.

to

• Type: Address

Address to send tokens to.

userToken

• Type: Address | bigint

Address or ID of the user token.

validatorToken

• Type: Address | bigint

Address or ID of the validator token.

account (optional)

• Type: Account | Address

Account that will be used to send the transaction. Defaults to connected Wagmi account.

feeToken (optional)

• Type: Address | bigint

Fee token for the transaction.

Can be a TIP-20 token address or ID.

feePayer (optional)

• Type: Account | true

Fee payer for the transaction.

Can be a Viem Account, or true if a Fee Payer Service will be used.

gas (optional)

• Type: bigint

Gas limit for the transaction.

maxFeePerGas (optional)

• Type: bigint

Max fee per gas for the transaction.

maxPriorityFeePerGas (optional)

• Type: bigint

Max priority fee per gas for the transaction.

nonce (optional)

• Type: number

Nonce for the transaction.

nonceKey (optional)

• Type: 'random' | bigint

Nonce key for the transaction. Use 'random' to generate a random nonce key.

validBefore (optional)

• Type: number

Unix timestamp before which the transaction must be included.

validAfter (optional)

• Type: number

Unix timestamp after which the transaction can be included.

throwOnReceiptRevert (optional)

• Type: boolean
• Default: true

Whether to throw an error if the transaction receipt indicates a revert. Only applicable to *Sync actions.

Viem

• amm.burn