What is the fastest way to send a Tx with WebSockets ?

[tsarbuig]

Hello guys,
I'm a bot developer, and I have a simple question : what is the fastest way to send a Tx ?

Right now, I'm using this:

your_tx = await router.swapExactETHForTokens(...)

But when I measure the time before and after, it tells me that it took 0.02s to make this "await..." statement...

Am I right to worry ? Or Tx is sent super-quickly and it's just the answer which is slow to arrive ?

And is there a faster way to send Tx ?

• I've seen stuff talking about "sendUncheckedTransaction" methods, but I'm using WebSockets, is it possible ?
• Or should I just use the "send" method ?

Thanks

[ricmoo]

The transaction is sent immediately, and depending on the Signer used, the transaction may need to be fetched. If you are using a FallbackProvider, the transaction is given to all backends, to ensure it makes it to as wide a collection of mempools initially, as possible.

Sending an unchecked transaction just means the return type is not fetched, so if you just want the result faster that will work, but the tx isn’t actually sent any faster.

Make sense?

[tsarbuig]

Thanks a lot bro, that's really great to read :)
Have a nice day !

[zemse]

And is there a faster way to send Tx ?

Just to add here, providing a gasLimit override can help removing an eth_estimateGas request that is done before signing the tx.

[brinal8055]

May I know difference between Fallback Provider and JSONRPC Provider. Does it simply mean that I can insert multiple providers like (Alchemy, quicknode, infura) as array and the transaction are send to all nodes ??

[zemse]

Yeah, FallbackProvider is created using multiple ethers.js providers (like JsonRpcProvider). It will try to send txs to all of the nodes. As well as it is useful to mitigate risk of malicious responses, i.e. if Infura's endpoint gets hacked for some reason and it provides incorrect information, then FallbackProvider can crosscheck with other providers to do a quorum check. You can checkout docs here.

[brinal8055]

Thanks @zemse. It really helped