We have released Entcoin v1.2.1, a mandatory mainnet consensus upgrade.

What changed?

Consensus rule version 2 will now activate at block 125,555, instead of block 160,000.

The new rule replaces the previous 60-block difficulty adjustment system with a per-block integer ASERT algorithm. This addresses a network liveness issue where difficulty could rise quickly after a large miner joined, but fall too slowly if that miner later stopped mining.

No additional hard-fork-level defects were found during the broader consensus audit.

Who must upgrade?

Everyone running v1.2.0, v1.1, or any earlier version must upgrade to v1.2.1.

After block 125,555, older clients will no longer be able to validate or follow the official v1.2.1 chain. They may:

  • Stop synchronizing at or near block 125,554
  • Display a network or synchronization error
  • Continue on an obsolete fork with other outdated nodes
  • Mine blocks that v1.2.1 nodes will reject
  • Broadcast transactions that never confirm on the official chain

The exact warning shown may differ between older client versions.

Are wallets and balances affected?

No.

This upgrade does not reset or replace the blockchain. It does not change:

  • Wallet addresses or private keys
  • Recovery phrases
  • Balances or transaction history
  • Existing blockchain data
  • The Entcoin network identity
  • The issuance schedule or total supply

Install v1.2.1 over the existing version and continue using the same wallet and data directory. Do not delete your ledger or create a new wallet.

As always, make sure you have a verified backup of your 24-word recovery phrase or .entwallet file.

Official infrastructure

Both official public Seed nodes have already been upgraded to v1.2.1. They are synchronized to the same height, block hash and cumulative chain work.

After activation, the official Seeds will accept and relay only blocks valid under the v1.2.1 consensus rules. However, Entcoin mainnet is independently validated by every participating v1.2.1 node; the official Seeds are network entry points, not centralized authorities.

Download

Official release:

https://github.com/HONG-LOU/entcoin/releases/tag/v1.2.1

Asia download mirror:

https://template-chat.xyz/downloads/v1.2.1/entcoin-amd64-installer.exe

US download mirror:

https://entcoin.xyz/downloads/v1.2.1/entcoin-amd64-installer.exe

Please verify downloads against the published SHA-256 checksum files.

Required action

Upgrade every desktop, CLI, validating, relay and mining node to v1.2.1 before block 125,555.

Users who remain on v1.2.0 or earlier will not affect the validity of the upgraded chain, but they will be unable to participate in it after activation.