Proposal For Segwit Update PR

[itsMikeLowrey]

I would like to make a PR to update this library to default to segwit and other issues mentioned here. Most of the heavy work has been done in this PR.

I propose to build off this work and make 2 major changes to karel-3d's PR.

1. Change Default Options to P2WSH Outputs and high R Sigs.
2. Change coinSelect(utxos, targets, feeRate) to coinSelect(utxos, targets, feeRate, options)
   and allow developers to override the default settings with their specific cases.

Just looking for a Concept ACK before I start coding up the PR, I would hate to code the wrong thing. @junderw

[junderw]

ACK sounds good to me.

[monokh]

I'm also interested in this.

I'm surprised there is not more appetite to get this through. Are people using alternatives or just settling on the pre segwit fee calculation?

[chemuto]

I'm also interested in this. Is it happening? Did you end up using another solution, @monokh ? Thanks!

[mahnunchik]

Any news?

[LeeKorbisCa]

#82