Ropsten TTD Announcement

• A Terminal Total Difficulty (TTD) of 50000000000000000 has been selected for the Ropsten Merge.
• Stakers and node operators indispensable manually override the TTD successful some their execution and statement furniture clients before June 7, 2022.
• Proof-of-Work testnets tin person volatile hash rates and the nonstop timing of The Merge connected Ropsten is hard to foretell accurately. Assuming nary unexpected hash complaint fluctuations, we expect The Merge to hap astir June 8-9, 2022.
• Note that syncing an execution furniture lawsuit connected Ropsten whitethorn instrumentality respective hours to days and is required to tally done The Merge.

Background

Earlier this week, the Ropsten testnet's modulation to proof-of-stake was announced. Due to the instability of hash complaint connected proof-of-work testnets, lawsuit releases supporting the upgrade were configured utilizing an artificially precocious Terminal Total Difficulty (TTD). This ensured that The Merge could not beryllium triggered earlier the Ropsten Beacon Chain was ready.

Yesterday, astatine slot 24000, the Bellatrix upgrade activated connected the Ropsten Beacon Chain, priming the web to tally done The Merge. A caller TTD worth of 50000000000000000 has been chosen to trigger the transition.

Node operators & stakers request to manually update this TTD worth connected some their execution and statement furniture clients anterior to the web reaching this full difficulty. The existent web full trouble is portion of the artifact header and tin beryllium obtained by querying your node oregon visiting a artifact explorer.

Assuming nary unexpected changes successful web hash rate, we expect this full trouble worth to beryllium hit, and TTD to beryllium exceeded, astir June 8-9, 2022.

Ropsten Merge Client Versions

To execute the Terminal Total Difficulty override, node operators and stakers indispensable tally the pursuing lawsuit versions oregon much caller ones. Note that some the statement and execution furniture clients indispensable beryllium afloat synced earlier The Merge, and that execution furniture clients whitethorn instrumentality respective hours to days to bash so.

Consensus Layer

Execution Layer

Terminal Total Difficulty Override

To activate The Merge astatine the close time, node operators and stakers indispensable override both their execution and statement furniture clients' Terminal Total Difficulty (TTD) worth to 50000000000000000.

Here are instructions for doing truthful with each client:

Execution Layer

Besu

• If utilizing TOML configuration files, adhd the pursuing line: override-genesis-config=["terminalTotalDifficulty=50000000000000000"]
• Or, erstwhile starting the node utilizing the CLI, adhd the pursuing flag: --override-genesis-config="terminalTotalDifficulty=50000000000000000"

Erigon

• When starting the node utilizing the CLI, adhd the pursuing flag: --override.terminaltotaldifficulty=50000000000000000

Go-Ethereum (geth)

• When starting the node utilizing the CLI, adhd the pursuing flag: --override.terminaltotaldifficulty 50000000000000000

Nethermind

• When starting the node utilizing the CLI, adhd the pursuing flag: --Merge.TerminalTotalDifficulty 50000000000000000
• This tin besides beryllium acceptable successful your client's configuration file oregon environment variables, by mounting the TerminalTotalDifficulty worth to 50000000000000000

Consensus Layer

Lighthouse

• When starting the node utilizing the CLI, adhd the pursuing flag: --terminal-total-difficulty-override=50000000000000000

Lodestar

• When starting the node utilizing the CLI, adhd the pursuing flag: --terminal-total-difficulty-override 50000000000000000
• For much information, spot this blog post.

Nimbus

• When starting the node utilizing the CLI, adhd the pursuing flag: --terminal-total-difficulty-override=50000000000000000

Prysm

• When starting the node utilizing the CLI, adhd the pursuing flag: --terminal-total-difficulty-override 50000000000000000
• This tin besides beryllium acceptable successful the config.yaml record by updating the TOTAL_TERMINAL_DIFFICULTY worth successful your configuration directory and restarting your client.

Teku

• When starting the node utilizing the CLI, adhd the pursuing flag: --Xnetwork-total-terminal-difficulty-override=50000000000000000

FAQ

As a node relation oregon staker, what should I do?

As mentioned successful the Ropsten Merge Announcement, node operators & stakers connected Ropsten indispensable update their execution and statement furniture clients the versions listed supra oregon much caller ones.

Once that is done, node operators & stakers indispensable manually override the Ropsten Terminal Total Difficulty (TTD) worth connected both their execution and statement furniture client utilizing the commands listed above.

Lastly, marque definite some your execution and statement furniture clients are afloat synced earlier The Merge. This whitethorn instrumentality up to respective days for execution furniture clients.

As an exertion oregon tooling developer, what should I do?

With The Merge going unrecorded connected Ropsten, present is the clip to guarantee that your merchandise works arsenic expected done the proof-of-stake modulation and successful a post-merge context. As explained successful a previous post, The Merge volition person lone minimal interaction connected a subset of contracts deployed connected Ethereum, nary of which should beryllium breaking. Additionally, the lion's stock of idiosyncratic API endpoints stay unchangeable (unless you usage proof-of-work circumstantial methods specified arsenic eth_getWork).

That said, astir applications connected Ethereum impact overmuch much than on-chain contracts. Now is the clip to guarantee that your front-end code, tooling, deployment pipeline and different off-chain components enactment arsenic intended. We powerfully urge that developers tally done a implicit investigating & deployment rhythm connected Ropsten (or Kiln) and study immoderate issues with tools oregon dependencies to those projects' maintainers. If you are unsure wherever to unfastened an issue, delight usage this repository.

As an Ethereum idiosyncratic oregon Ether holder, is determination thing I request to do?

No. The Ethereum mainnet is not affected by this testnet. Subsequent announcements volition beryllium made connected this blog earlier mainnet's transition.

As a miner, is determination thing I request to do?

No. If you are mining connected the Ethereum mainnet oregon Ropsten, you should beryllium alert that each web volition run wholly nether proof-of-stake aft The Merge. At that point, mining volition nary longer beryllium imaginable connected the network.

This is expected astir June 8-9, 2022 connected Ropsten and aboriginal this twelvemonth for the Ethereum mainnet.

wen merge?

As of the work of this post, the day for the Ethereum mainnet proof-of-stake modulation has not been set. Any root claiming different is apt to beryllium a scam. Updates volition beryllium posted connected this blog. Please enactment safe!

Assuming nary issues are recovered with Ropsten, erstwhile lawsuit investigating is complete, Ethereum's different testnets, volition tally done The Merge. Once Goerli and Sepolia person successfully transitioned and stabilized, a slot tallness volition beryllium chosen for the Bellatrix upgrade connected the Beacon Chain and a terminal full trouble value volition beryllium acceptable for the mainnet transition. Clients volition past marque releases that alteration The Merge connected mainnet. These volition beryllium announced connected this blog and successful different assemblage publications. The representation beneath illustrates this process:

Note that this assumes each measurement goes arsenic expected. If issues are recovered astatine immoderate constituent successful the process oregon trial sum is judged to beryllium insufficient, these volition beryllium addressed earlier continuing with the deployment process.

Only past volition it beryllium imaginable to estimation the nonstop day for The Merge.

In different words, 🔜.