Usage: wallet.generateNewWalletId()
Description: Internally, each wallet has a WalletId attached. This tries to be deterministic by actually just be a substring of a double sha256 hash from the input.
Notes: This is an internal method, in the future, when TC39 proposal pass, we will use the private markup. Also, mutates Wallet.walletId.

Parameters:

parameters	type	required	Description

Returns : String (wallet.walletId).