HTX to Support the DYDX(DYDX), XION(XION) and Casper(CSPR) Network Upgrades

Dear HTX Users,

HTX will support the DYDX(DYDX), XION(XION) and Casper(CSPR) Network Upgrades with the following plan:

HTX will suspend the deposit and withdrawal services for DYDX at 15:00:00 (UTC) on December 8, 2025;

HTX will suspend the deposit and withdrawal services for XION at 15:00:00 (UTC) on December 8, 2025;

HTX will suspend the deposit and withdrawal services for CSPR at 13:00:00(UTC) on December 11, 2025;

You may deposit DYDX, XION and CSPR in advance. We will handle all technical requirements involved for all users.

Please note:

● The DYDX(DYDX) Network Upgrade will take place at block height of 66630000 (approximately at 16:51:10 (UTC) on December 8 , 2025;The XION(XION) Network Upgrade will take place at block height of 16425000 approximately at 16:56:29  (UTC) on December 8, 2025;The Casper(CSPR) Network Upgrade will take place at block height of  Era 20517  approximately at 14:55:00  (UTC) on December 11, 2025;

● The trading of DYDX, XION and CSPR will not be affected during the network upgrades.

● The network upgrades will not result in creation of new tokens.

● HTX will resume deposits and withdrawals for DYDX, XION and CSPR once we deem the upgraded network to be stable, which will not be further announced.

For more information, please refer to:

https://github.com/dydxprotocol/v4-chain/releases/tag/protocol/v9.5.0

https://github.com/burnt-labs/xion/releases/tag/v25.0.1

https://github.com/casper-network/casper-node/releases/tag/v2.1.1

HTX

December 8 , 2025

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HTX reserves the right in its sole discretion to amend or change or cancel this announcement at any time and for any reasons without prior notice. The above is for information purposes only and HTX makes no recommendations or guarantees in respect of any virtual asset, product, or promotion on HTX. Prices of virtual assets are highly volatile and trading virtual assets involves risk. Please read our Risk Reminder text here.