shapeshift
Upgrade Native Wallet to Support protocol buffer tendermint tx format
As of v0.40, the Cosmos SDK uses Protocol Buffers (also known as "protobuf")
This prevents any integrator of HDWallet from being able to broadcast signed transactions against a node > v0.40.
A.C. Native Wallet returns a broadcastable protobuf transaction on signed tendermint transactions
We've already merged part of this, but there are some remaining references to the old packages/hdwallet-native/src/crypto/isolation/adapters/cosmos.ts in hdwallet-native; repurposing this issue to track removal of that and full conversion to the new signing mechanism.
This will also remove our dep on tendermint-tx-builder, finally allowing us to close out https://github.com/shapeshift/lib/issues/139.
