I have a contract that needs multiple approvals for a transaction to go through.

  • a user requests a withdraw
  • the site approves the withdraw
  • an escrow also approves

So there needs to be 3 interactions with the blockchain before a withdraw request goes through. I read somewhere that Coinbase needs 60 confirmations before finalising a transaction. I feel like it's too slow to wait 60 confirmations for every action.

Is there a table of likelihoods that shows how likely a block is to be reversed after N confirmations? That way, I can better estimate when the approvals should be applied.

also, how would Pos affect confirmation times?

  • There's supposed to a "finalized" and "safe" tag in the JSON-RPC now. Until an answer is written about the JSON-RPC, this has been the customary answer: ethereum.stackexchange.com/questions/319/…
    – eth
    Commented Oct 5, 2022 at 7:24

1 Answer 1


This is the best table I have found so far:

enter image description here

See: https://blog.ethereum.org/2021/11/29/how-the-merge-impacts-app-layer

A finalized block is a block that has been accepted as canonical by >2/3 of validators and is the most recent crypto-economically secured block, which cannot be reorganized outside by manual intervention driven by community coordination.

You can learn more about how the finalized tag work here:



Also, PoS affect confirmation times as the Beacon Chain blocks take 64-95 slots (~15 minutes) to finalize.

See: https://notes.ethereum.org/@vbuterin/single_slot_finality

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