How to cancel an Order using Web3.js?

[inartin]

I'm trying to cancel an order using web3.js.
I was told that for the Tuple type parameter I need to insert the full order JSON.
That's what I did and here is the error I get:

invalid tuple value (argument="tuple", value=undefined, code=INVALID_ARGUMENT, version=abi/5.0.0-beta.153)

Screenshot

Here is how I called it:

contract.methods.cancel(orderJson).send({ from:selectedAddress })

Is there an example of how this method can be implemented?

[antho1404]

I think the type of your orderJson is not the right one. To cancel the order, you need to have the structure of the order as defined here in the cancel function.

In your screenshot, you have an order containing the type, which is not part of the structure defined in the smart contract.

This order needs to be converted to the correct structure. So far, the only way I could do that is to use a function orderToStruct in the @rarible/protocol-ethereum-sdk that is used to fill the order but can be used to cancel it as well.

Try including the SDK and use the following.

// Import the function from '@rarible/protocol-ethereum-sdk/build/order/sign-order'
import { orderToStruct } from '@rarible/protocol-ethereum-sdk/build/order/sign-order'

...
contract.methods.cancel(orderToStruct(orderJson)).send({ from:selectedAddress })

This should send the right structure to the smart contract and mark this order as canceled in the exchange to make sure no one can fill it again.

[inartin]

Thanks, it works now!
I'm working with a js compatible only platform, and so I converted it from typescript to js and everything works fine.

[antho1404]

Great, keep in mind that this conversion orderToStruct will be needed for pretty much all the orders you have to send to the smart contract's exchange.