Republic Protocol (REN) is a protocol for trading large amounts of encrypted assets in distributed dark pools between BTC/ETH, BTC/ERC20 and ETH/ERC20. It is currently the only area known to have such distributed encrypted asset dark pool trading technology. Blockchain enterprises. In the traditional U.S. and European stock markets, dark pool transactions account for about 10-30% of all industry transactions. JPMorgan Chase, Goldman Sachs, Fidelity, Deutsche Bank, and Morgan Stanley are among the few brokers that own dark pool transactions.