cmd/utils: add deprecation warning for Rinkeby

[karalabe]

TL;DR:

$ geth --rinkeby --syncmode=light console]

INFO [05-16|08:28:09.050] Starting Geth on Rinkeby testnet... 
INFO [05-16|08:28:09.050] Dropping default light client cache      provided=1024 updated=128
INFO [05-16|08:28:09.052] Maximum peer count                       ETH=0 LES=10 total=50
INFO [05-16|08:28:09.053] Set global gas cap                       cap=50,000,000
WARN [05-16|08:28:09.053]  
WARN [05-16|08:28:09.053] -------------------------------------------------------------------------------- 
WARN [05-16|08:28:09.053] Please note, Rinkeby has been deprecated. It will still work for the time being, 
WARN [05-16|08:28:09.053] but there will be no further hard-forks shipped for it. Eventually the network 
WARN [05-16|08:28:09.053] will be permanently halted after the other networks transition through the merge 
WARN [05-16|08:28:09.053] and prove stable enough. For the most future proof testnet, choose Sepolia as 
WARN [05-16|08:28:09.053] your replacement environment (--sepolia instead of --rinkeby). 
WARN [05-16|08:28:09.053] -------------------------------------------------------------------------------- 
WARN [05-16|08:28:09.053]  
INFO [05-16|08:28:09.053] Allocated cache and file handles         database=~/.ethereum/rinkeby/geth/lightchaindata cache=64.00MiB handles=524,288

[MariusVanDerWijden]

Doesn't look good to me 😢
But approved

[ksaitor]

sadness :(

[guillermoriv]

Sadness : (

[sasicodes]

💔

[0xSumitBanik]

Sad Day 🥲

[PatrickAlphaC]

Welp... My upcoming 24-hour video is using Rinkeby.

Hopefully, the chain continues to work for at least for the next year 😢

[karalabe]

There's no immediate plan to terminate the chain. It won't happen prior to the next EL feature fork, which probably won't happen this year, so :)

[PatrickAlphaC]

The Geth team is so based. Thank you @karalabe!!!

[tallywiesenberg]

Pressing F to pay respects

F

[q9f]

Related:

• Post-Merge testnets pm#460
• https://ethereum-magicians.org/t/og-council-post-merge-testnets/9034