Allow Infura users to use a private key

[james-hummingbot]

Is there any reason to disallow the use of a private key for signing if the user is using Infura?

https://github.com/curvefi/curve-js/blob/master/src/curve.ts#L151

[Macket]

Actually no reasons. Will implement later

[abhimanyu891998]

is this implemented @Macket ?

[abhimanyu891998]

I am try to sign transactions using the private key of my ethereum wallet, not sure how to do that