This script first fetches the hex of a P-Chain transaction. From that hex it creates a `Buffer` & then it creates an empty P-Chain `Tx` & populates it via passing in the `Buffer` to `tx.fromBuffer`. Next it calls `JSON.stringify` on the `Tx` to encode it as a JSON string. Lastly it takes the JSON string & convert it to an actual JSON object.

stringify-pchain-tx.ts

import { Avalanche, Buffer } from "avalanche"
import { PlatformVMAPI, Tx } from "avalanche/dist/apis/platformvm"

const ip: string = "api.avax.network"
const port: number = 443
const protocol: string = "https"
const networkID: number = 1
const avalanche: Avalanche = new Avalanche(ip, port, protocol, networkID)
const pchain: PlatformVMAPI = avalanche.PChain()

const main = async (): Promise<any> => {
  const txID: string = "7mnY7SqR1s8aTJShjvW1Yebe4snCzsjhonFrrXiWBE4L9x9A6"
  const hex = await pchain.getTx(txID) as string
  const buf: Buffer = new Buffer(hex.slice(2), "hex")
  const tx: Tx = new Tx()
  tx.fromBuffer(buf)
  const jsonStr: string = JSON.stringify(tx)
  console.log(jsonStr)
  const jsn: Object = JSON.parse(jsonStr)
  console.log(jsn)
}

main()