async function setProlicy(){
    const script = createScript({
        scriptHash: CONST.ASSET_ID.POLICY,
        operation: "setMaxBlockSize",
        args: [ ContractParam.integer(100000)]
      });
   
    const transaction = new Transaction({
        sender: reverseHex(multisigAcct.scriptHash),
        cosigners: [{
            account: reverseHex(accounts[0].scriptHash),
            scopes: tx.WitnessScope.CalledByEntry
        },{
            account: reverseHex(accounts[1].scriptHash),
            scopes: tx.WitnessScope.CalledByEntry
        },{
            account: reverseHex(accounts[2].scriptHash),
            scopes: tx.WitnessScope.CalledByEntry
        }],
        validUntilBlock: 100000,
        systemFee: 5,
        networkFee: 5,
        script,
    })

    console.log(transaction)
    
    transaction.sign(accounts[0]).sign(accounts[1]).sign(accounts[2])
    console.log(transaction.serialize(true))

    let txid = await client.sendRawTransaction(transaction.serialize(true));
    console.log(txid)
}