# Will the mempool change in PoS Ethereum?
**URL:** https://collective.flashbots.net/t/will-the-mempool-change-in-pos-ethereum/149
**Category:** Searchers
**Tags:** question
**Created:** [August 24, 2022, 3:19am UTC](https://collective.flashbots.net/t/will-the-mempool-change-in-pos-ethereum/149 "2022-08-24T03:19:01Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@brock](https://collective.flashbots.net/u/brock)
#### Post date: [August 24, 2022, 3:19am UTC](https://collective.flashbots.net/t/will-the-mempool-change-in-pos-ethereum/149/1 "2022-08-24T03:19:01Z")
The public mempool works the same in PoS as in PoW — anyone running an execution client (e.g. geth) can read transactions from the mempool.
It should be noted, however, that the post-merge public mempool may not see as much activity as it does today. With PBS, users and wallets may choose to send all of their transactions to a specific builder (or builders) rather than to the public mempool.
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### Author:  [@vishal](https://collective.flashbots.net/u/vishal)
#### Post date: [September 10, 2022, 10:55pm UTC](https://collective.flashbots.net/t/will-the-mempool-change-in-pos-ethereum/149/2 "2022-09-10T22:55:51Z")
If public mempool might not see much activity post merge , as an individual, does it make sense to be a builder ? How would users discover me (as a builder) and trust to send me txn to buid block .
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### Author:  [@Fred](https://collective.flashbots.net/u/Fred)
#### Post date: [September 14, 2022, 4:07pm UTC](https://collective.flashbots.net/t/will-the-mempool-change-in-pos-ethereum/149/3 "2022-09-14T16:07:00Z")
Is it possible to differentiate between transactions coming from the public mempool and transactions from private orderflow? (Without running a full node and comparing to the tx you’ve been gossiped)
Maybe transactions with 0 gwei as validator tip?
But I guess that would only catch private orderflow coming from the wallet-level, and not flows from applications or node providers like Infura. Maybe I’m missing something?
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### Author:  [@brock](https://collective.flashbots.net/u/brock)
#### Post date: [September 16, 2022, 8:34pm UTC](https://collective.flashbots.net/t/will-the-mempool-change-in-pos-ethereum/149/4 "2022-09-16T20:34:49Z")
Hey @vishal good question. Being a builder is indeed a way to get more orderflow. As for how you convince searchers to send you their orderflow, that’s up to you 🙂
Check out [this post](https://collective.flashbots.net/t/do-you-want-to-run-a-builder/212) for more information on becoming a builder.
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### Author:  [@brock](https://collective.flashbots.net/u/brock)
#### Post date: [September 16, 2022, 8:44pm UTC](https://collective.flashbots.net/t/will-the-mempool-change-in-pos-ethereum/149/5 "2022-09-16T20:44:58Z")
> Is it possible to differentiate between transactions coming from the public mempool and transactions from private orderflow? (Without running a full node and comparing to the tx you’ve been gossiped)
You can see blocks proposed via the FB relay (and therefore transactions) here: [https://boost-relay.flashbots.net/](https://boost-relay.flashbots.net/)
However, it’s not possible in that context to differentiate between mempool transactions and original private transactions without doing a mempool comparison. However, you don’t need to sync a full node to view the mempool. A light node will work fine. Also note that no mempool view is 100% complete, so this method won’t be 100% accurate, though you can improve the accuracy by peering with a well-distributed array of nodes.
> Maybe transactions with 0 gwei as validator tip?
Transactions w/ 0 validator tip won’t be a good differentiator, as searchers will be using that field to bid for inclusion.
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### Author:  [@Fred](https://collective.flashbots.net/u/Fred)
#### Post date: [September 16, 2022, 9:25pm UTC](https://collective.flashbots.net/t/will-the-mempool-change-in-pos-ethereum/149/6 "2022-09-16T21:25:00Z")
Ah, I didn’t realize searchers used the tip field to bid for inclusion, but it makes a lot of sense. Thanks!