builder0x69.eth @builder0x69

Endpoint for searchers(bundle/tx): https://t.co/zq4VLGlZaQ RPC endpoint for wallets: https://t.co/RqstJUUu43 Documentation: https://t.co/pF8mKGv64u docs.builder0x69.io Ethereum Joined September 2022

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builder0x69.eth @builder0x69

3 years ago

@ballsyalchemist I don't understand why it's surprise for anyone. After low-card-crusader all relays already got stricter on timing and reject late block payload requests. Forked blocks still happen from time to time even if less frequently for mev-boost than classic: etherscan.io/blocks_forked

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builder0x69.eth @builder0x69

3 years ago

@ballsyalchemist @0x94305 Correct In most cases participation is 99% or higher so majority of nodes agree. But in cases where block was released very close to cut-off(3 seconds into next slot) you can have split between nodes so some will reject block received late and consider all transactions as public

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builder0x69.eth @builder0x69

3 years ago

@0x94305 Re-phrasing my answer to be more polite: 1) Mempool guru data is wrong and all 8 TXs were private in this block. 2) Likely their node received 17670167 late and didn't consider it canonical. 3) Next slot had only 47% sync participation but won anyway with proposer boost.

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builder0x69.eth @builder0x69

3 years ago

@0xdapper_ @hrkrshnn We do support gas-less bundles so EOA can have 0 balance initially, but constructing a bundle is a rather hard task for normal users. Also most popular wallets won't allow you to broadcast transaction from empty wallet even if using custom RPC provider which accepts them.

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builder0x69.eth @builder0x69

3 years ago

@MevRefund @sensei_dot_win Per documentation it should be 40% user, 15% bloxroute, here it looks like 55% bloxroute in case of etherscan.io/tx/0x023ad8874… Though may be indeed it's not backrunme endpoint but something else.

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builder0x69.eth @builder0x69

3 years ago

@MevRefund @sensei_dot_win At the same time I think users do get refunds, just access for searchers is permission-ed(unlike other OFAs) so searchers make the payment. Per distribution in: docs.bloxroute.com/introduction/b… Still sharing transactions with permissioned group of paying searchers is not same as private.

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builder0x69.eth @builder0x69

3 years ago

@MevRefund I can tell you more, recently @sensei_dot_win reached out about weird behaviour for bundles they submit. It looks like bloxroute automatically add refundPercent/refundRecipient to bundles they forward to other builders like us and that's why you see so many refunds from us.

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builder0x69.eth @builder0x69

3 years ago

@MevRefund Also want to clarify that automatic gas-less bundles were advertised way back in November: medium.com/@builder0x69/5… It means that builder will automatically fund any EOA inside the bundle if it has insufficient funds.

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builder0x69.eth @builder0x69

3 years ago

@MevRefund @0x94305 That was advertised way back in November: medium.com/@builder0x69/5… And gas-less bundles are beneficial for 99.9% of bundles, that's indeed a weird edge case since searcher decided to ignore main principle of bundles that transaction should revert in case of failed opportunity.

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builder0x69.eth @builder0x69

3 years ago

@0x94305 @0xMikolaj @should_b_workin @NatashaVasan But this discussion already turned out too long for twitter shit-posting so I'll stop.

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builder0x69.eth @builder0x69

3 years ago

@0x94305 @0xMikolaj @should_b_workin @NatashaVasan Well then just create bait TX moving price a lot on some ill-liquid yet popular ERC20. For your (1) ETH-USDC example they don't need any private information whatsoever since they can just always bid 100% in their own blocks.

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builder0x69.eth @builder0x69

3 years ago

@TheDEFIac @0x94305 @0xMikolaj @should_b_workin @NatashaVasan You mean in both arms of A/B test you didn't get any fills? Well if you take a week and split it into even/odd blocks, half of good opportunities will be in even blocks, half in odd blocks. But if you don't get any fills in both arms of test you're probably just a bad searcher?

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builder0x69.eth @builder0x69

3 years ago

@TheDEFIac @0x94305 @0xMikolaj @should_b_workin @NatashaVasan Which is true in both cases of 50%/50% split, no? Or just measure your adverse selection then during the A/B test

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builder0x69.eth @builder0x69

3 years ago

@TheDEFIac @0x94305 @0xMikolaj @should_b_workin @NatashaVasan My example was mainly for (2) copy atomic arbs where I think no-ones cares about nature of ERC20 being traded. For non-atomic trading probably it would indeed require some capital to setup the bait/test.

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builder0x69.eth @builder0x69

3 years ago

@TheDEFIac @0x94305 @0xMikolaj @should_b_workin @NatashaVasan What's the problem with targeting just a block number? Over longer time period with 50% split it, price spikes should even each other out.

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builder0x69.eth @builder0x69

3 years ago

@0x94305 @0xMikolaj @should_b_workin @NatashaVasan > How do you design honeypot txs? Just create a new honeypot contract/token no-one knows about it so probability of trading with it / using it is 0 unless your transaction was copied. Many such examples to bait in the mem-pool.

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builder0x69.eth @builder0x69

3 years ago

@TheDEFIac @0x94305 @0xMikolaj @should_b_workin @NatashaVasan Any large searcher or large OFA should be able to get statistically significant results rather quickly. Tech for 50% A/B test based on block number doesn't sound like rocket science. In terms of capital as a searcher/OFA you're already sending these bundles anyway?

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builder0x69.eth @builder0x69

3 years ago

@0x94305 @0xMikolaj @should_b_workin @NatashaVasan If you're a searcher you can also run basic A/B test: 1) 50% of blocks you send only to builders you highlighted above 2) 50% of blocks you send to all large builders(even searcher-builders) Would love to see results in terms of captured opportunities / profitability in general.

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builder0x69.eth @builder0x69

3 years ago

@0x94305 @0xMikolaj @should_b_workin @NatashaVasan Just send bait/honeypot transactions as an outsider? As searcher you can also easily start sending your bundles only to subset of builders while measuring percent of blocks where someone paid more for the same opportunity as you.

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builder0x69.eth @builder0x69

3 years ago

@0x94305 @0xMikolaj @should_b_workin @NatashaVasan There're lots of stats you can compute, information whether TX was public or not is also available for everyone. As searcher you can also exclude builders 1-by-1 when sending private txs and compare results. But like any proper analysis it takes time so way easier to speculate.