> For the complete documentation index, see [llms.txt](https://cetus-1.gitbook.io/cetus-developer-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cetus-1.gitbook.io/cetus-developer-docs/developer/via-sdk-v2/sdk-modules/cetusprotocol-burn-sdk/burn-lock.md).

# Burn lock

`createBurnPayload` creates a transaction builder for a burn lock transaction.

```typescript
const pool_id = '0xc41621d02d5ee00a7a993b912a8550...'
const pos_id = '0x4e1970683fc49de834478339724509a05...' // is burn success
const coin_type_a = '26b3bc67befc214058ca78ea9a2690298d731a2d4309485ec3d40198063c4abc::usdc::USDC'
const coin_type_b = '26b3bc67befc214058ca78ea9a2690298d731a2d4309485ec3d40198063c4abc::cetus::CETUS'
const txb = await sdk.Burn.createBurnPayload({
  pool_id,
  pos_id,
  coin_type_a,
  coin_type_b,
})

const simulate_res = await sdk.FullClient.devInspectTransactionBlock({
  transactionBlock: txb,
  sender: account,
})
```