“I see less about privacy and more about fungibility. So I think in order for Bitcoin and Litecoin to be like useful money it really has to fungible,” said Litecoin creator Charlie Lee when enquired about the need to implement privacy protocol MimbleWimble when there are existing privacy coins such as Monero, ZCash, Dash, etc.
Lee, who appeared at the latest episode of Grin Talk further alluded that privacy was “a requirement to fungibility”. He further said:
“what we’re proposing an opt-in kind of privacy when we’re using MimbleWimble on an extension block so you can think of extension block as a sidechain to Litecoin that is effectively permanently attached to the main-chain, so each main-chain will have there will be an extension block with it. In the extension block, every transaction is MW. On the main-chain nothing really changes, so you can move your coins back and forth within the chain pegging into the extension block and pegging out. So if you want more fungibility, you would send you coin to extension block and from that point on, it uses MW”
This was very similar to the privacy focussed Grin, and according to Lee, users get both “financial privacy as well as more fungibility”.
Litecoin Foundation pitched its draft proposal on MimbleWimble implementation through Extension Blocks [EB] recently. This involved the Litecoin creator working with a Grin developer David Burkett which prompted many in the community to think that the cryptocurrency could be revamped as a privacy coin.
This subsequently led to concerns regarding delisting from major exchanges, at a time when delisting of privacy coins like Monero,