SubSquare is proposing to change the HRMP channel deposits on Polkadot from 20,000 DOT to 1,000 DOT. This change should be enacted at a similar time to the enactment of the v9190 or later runtime upgrade. The deposit is per one-way channel, so a bi-directional HRMP channel will require 2,000 DOT per parachain. Configuration changes can take a few sessions to take effect, depending on other pending changes in the parachains protocol. Therefore, parachains should wait until the new configuration takes effect before opening channels if they want to take advantage of the lower deposit.
