StronglyTypedXcmGeneration.ts

// First install PAPI and add the passet chain, like this:
// bun i polkadot-api
// bun papi add -w wss://testnet-passet-hub.polkadot.io passet

// Then put the content below in a file like `index.ts` and simply run:
// bun index.ts

import {
  passet,
  XcmVersionedXcm,
  XcmV5Instruction,
  XcmV5AssetFilter,
  XcmV5Junction,
  XcmV5Junctions,
  XcmV3MultiassetFungibility,
  XcmV3WeightLimit,
  XcmV5WildAsset,
  XcmV2MultiassetWildFungibility,
} from "@polkadot-api/descriptors"
import { Binary, getTypedCodecs, AccountId } from "polkadot-api"
import { toHex } from "polkadot-api/utils"

const recipientAddress = "5DJEnMcMvsvD3EsbVjnUAETUsitvBoieqMxTWp8y6EUkGMgN" // Replace with actual address
const recipientPublicKey = AccountId().enc(recipientAddress)

// Prepare the XCM message with V5 instructions
const xcmMessage = XcmVersionedXcm.V5([
  // WithdrawAsset instruction
  XcmV5Instruction.WithdrawAsset([
    {
      id: {
        parents: 1,
        interior: XcmV5Junctions.Here(),
      },
      fun: XcmV3MultiassetFungibility.Fungible(1200000000n),
    },
  ]),

  // BuyExecution instruction
  XcmV5Instruction.BuyExecution({
    fees: {
      id: {
        parents: 1,
        interior: XcmV5Junctions.Here(),
      },
      fun: XcmV3MultiassetFungibility.Fungible(1200000000n),
    },
    weight_limit: XcmV3WeightLimit.Unlimited(),
  }),

  // DepositAsset instruction
  XcmV5Instruction.DepositAsset({
    assets: XcmV5AssetFilter.Wild(
      XcmV5WildAsset.AllOf({
        id: {
          parents: 1,
          interior: XcmV5Junctions.Here(),
        },
        fun: XcmV2MultiassetWildFungibility.Fungible(),
      })
    ),
    beneficiary: {
      parents: 0,
      interior: XcmV5Junctions.X1(
        XcmV5Junction.AccountId32({
          network: undefined,
          id: Binary.fromBytes(recipientPublicKey),
        })
      ),
    },
  }),
])

const typedCodecs = await getTypedCodecs(passet)
const xcmExecuteTxCodec = typedCodecs.tx.PolkadotXcm.execute
const xcmMsgCodec = xcmExecuteTxCodec.inner.message

console.log(toHex(xcmMsgCodec.enc(xcmMessage)))