burnproof.js

const matic_raw = require("./maticjs")
const config = require("./config.json")
const ext_mngr = require("./maticjs/lib/common/ExitManager")
// console.log(ext_mngr)
const root_chain = require("./maticjs/lib/root/RootChain.js")
// console.log(root_chain)
const { default: ExitManager } = require("./maticjs/lib/common/ExitManager")
const { default: RootChain } = require("./maticjs/lib/root/RootChain.js")
const params = {
    network: "testnet",
    version: "mumbai",
    maticProvider: config.MATIC_PROVIDER,
    parentProvider: config.PARENT_PROVIDER,
    posRootChainManager: config.ROOTCHAIN_MANAGER_PROXY,
    posERC721Predicate: config.ERC721_PREDICATE_PROXY,
    posERC1155Predicate: config.ERC1155_PREDICATE_PROXY,
}
async function exec() {
    const pos_client = new matic_raw.MaticPOSClient(params)
    // console.log(pos_client)
    const mgr = new ExitManager(RootChain, params, pos_client)
    const temp = mgr.web3Client.posRootChainManager.exitManager
    // console.log(temp)
    const payload = await temp.buildPayloadForExit(
        "0x4756b76a9611cffee3d2eb645819e988c34615621ea256f818ab788d81e1f838", // BURN TX: Change this to your hash
        "0x8c5261668696ce22758910d05bab8f186d6eb247ceac2af2e82c7dc17669b036") // MESSAGE_SENT_EVENT_SIG: Do not change this
    console.log(payload)
}
exec()

@QEDK can you include the config.json file that is being referenced? I am trying to replicate this script in my own environment and want to be sure that I have the configuration values correct

Yep, I would also be very grateful if you share the config because I've been trying several approaches but without success yet. Or at least please specify what are the following arguments of the params dict : ROOTCHAIN_MANAGER_PROXY, ERC721_PREDICATE_PROXY, ERC1155_PREDICATE_PROXY.

maybe more straightforward to just call posClient.exitUtil.buildPayloadForExit(txhash, sig)