BN and await Not wokring

[saarshah]

I have followed this tutorial , following command give error

await contract.deploy({arguments: [254]}).send({
    from: '0xbbd9e9be525ab967e633bcdaeac8bd5723ed4d6b',
    gas: 100000000,
    gasPrice: 819
 }); // deploy contract by `send`

Error: SyntaxError: await is only valid in async function

const bn = new BN(10) gives error, ReferenceError: BN is not defined

[liuis]

@saarshah ，Async () function returns the object is a Promise, so can't use the outermost layers in await get its return value, you should use the original way, then () chain to deal with this Promise。