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clean up chapter for pof

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MEV_searchers/order_flows/exclusive_order_flows.md
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## exclusive order flows ## exclusive/private order flows
<br> <br>
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<br> <br>
#### types of private order flows
<br>
<center>
<img width="500" src="https://user-images.githubusercontent.com/1130416/217937850-9b7e9434-ee72-4c2a-9e5e-ae9fe795310e.png">
</center>
<br>
##### rpc-based "payment for order flow protocols" (POFPs)
* this type of private order flows can be realized by modifying either the user's rpc or by modifying the protocol's frontend
* the rpc endpoint re-broadcasts (forwarding) the tx to nodes.
* in respect to every pending tx they receive, they can: 1) censor, 2) forward to some mempool, or 3) forward it directly to some block-builders or validators.
<br>
##### validator transaction reordering protocols (VTRPs)
* private tx reordering
* two goals: 1) identify valuable user txs, 2) replace the POFP's value-extracted tx with its own value-extractive tx
* when a VTRP is able to identify a valuable user tx but, due to the tactics of the POFP, is unable to inject its own transaction in place of the POFP's -> VTRP's optimal strategy is to censor the user's transaction from the final block
<br>
--- ---
### resources ### cool resources
<br> <br>
* [private order flow and the block builder market, by jon charbonneau](https://twitter.com/jon_charb/status/1562916372505665536) * **[the orderflow auction design space, by frontier (2023)](https://frontier.tech/the-orderflow-auction-design-space)**
* [ethereum's biggest issue no one's talking about](https://mariusvanderwijden.github.io/blog/2022/10/21/lightclients/) * **[private order flow and the block builder market, by j. charbonneau (2022)](https://twitter.com/jon_charb/status/1562916372505665536)**
* [private order flow is the new MEV (youtube)](https://www.youtube.com/watch?v=bapIqxhIdaY) * **[ethereum's biggest issue no one's talking about, by mvd wijden (2022)](https://mariusvanderwijden.github.io/blog/2022/10/21/lightclients/)**
* [order flow, auctions and centralisation II: order flow auctions](https://collective.flashbots.net/t/order-flow-auctions-and-centralisation-ii-order-flow-auctions/284) * **[private order flow is the new mev (video), by empire (2022)](https://www.youtube.com/watch?v=bapIqxhIdaY)**
* [order flow, auctions & centralisation, by q. kilbourn](https://www.youtube.com/watch?v=ilc3EoSMMDg) * **[order flow, auctions and centralisation II: order flow auctions, by quintus (2022)](https://collective.flashbots.net/t/order-flow-auctions-and-centralisation-ii-order-flow-auctions/284)**
* [order flow auctions & enshrined builder, by apriori](https://mirror.xyz/apriori.eth/wiLKgkaN6JBwBDq4E3T_-BZ0OIPhlbIItgJdE3CFAMo) * **[order flow auctions & enshrined builder, by apriori (2022)](https://mirror.xyz/apriori.eth/wiLKgkaN6JBwBDq4E3T_-BZ0OIPhlbIItgJdE3CFAMo)**
* [payment for order flow on tradefi, by forbes](https://www.forbes.com/advisor/investing/payment-for-order-flow/)
* [the orderflow auction design space, by frontier](https://frontier.tech/the-orderflow-auction-design-space)