Tune in to @Ledger Twitter in one hour (10am EST) for the #Ledger Op3n keynote with @_pgauthier @AWengroff @P3b7_ @AlexZINDER3 @Boomcat @sebadault @CR

Tune in to @Ledger Twitter in one hour (10am EST) for the #Ledger Op3n keynote with @_pgauthier @AWengroff @P3b7_ @AlexZINDER3 @Boomcat @sebadault @CR