Track nonce locally so it is possible to make multiple transactions in a single block

Currently unless I track the nonce locally in my code and pass it to signAndSend, the second one is likely going to fail because the nonce value it used will be same as the first one.

polkadot.js should provide a way to track nonce for each account so we can make multiple transactions in a block.

Background: We are implement a very simple faucet service, with a naive implementation it cannot handle two users requesting fund at same time due to nonce issue. And now the implementation is getting bit more complicated than I initially expected. I hope polkadot.js can shield us from those details.

Related but not dependent on: https://github.com/paritytech/substrate/issues/2263

[xlc]

Make sense. Let’s see what will come out of https://github.com/paritytech/substrate/issues/2263

At minimum I think it make sense to have a receipt to show how to catch nonce issue when submitting transaction and retry with an updated new nonce. It won’t be optimal but good enough for most of the cases.

So this become a document issue that we should teach user how to handle nonce error.

[polkadot-js-bot]

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