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![yyehazel Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1868587898544775168.png) yyehazel [@yyehazel](/creator/twitter/yyehazel) on x XXX followers
Created: 2025-07-20 07:46:22 UTC

1๏ธโƒฃ๐‘๐จ๐ฅ๐ฅ๐ฎ๐ฉ ๐“๐ฒ๐ฉ๐ž    

โœฆ Citrea = ZK-Rollup     
โœฆ Merlin = Optimistic Rollup

While both scale Bitcoin, they use ๐ฏ๐ž๐ซ๐ฒ ๐๐ข๐Ÿ๐Ÿ๐ž๐ซ๐ž๐ง๐ญ ๐ฌ๐ž๐œ๐ฎ๐ซ๐ข๐ญ๐ฒ ๐š๐ฌ๐ฌ๐ฎ๐ฆ๐ฉ๐ญ๐ข๐จ๐ง๐ฌ.

2๏ธโƒฃ ๐’๐ž๐œ๐ฎ๐ซ๐ข๐ญ๐ฒ ๐€๐ซ๐œ๐ก๐ข๐ญ๐ž๐œ๐ญ๐ฎ๐ซ๐ž 

Citrea uses zk-SNARKs, meaning every batch of transactions is ๐œ๐ซ๐ฒ๐ฉ๐ญ๐จ๐ ๐ซ๐š๐ฉ๐ก๐ข๐œ๐š๐ฅ๐ฅ๐ฒ ๐ฏ๐ž๐ซ๐ข๐Ÿ๐ข๐ž๐.  No need to trust any external party. No waiting period.
Merlin uses ๐—ณ๐—ฟ๐—ฎ๐˜‚๐—ฑ ๐—ฝ๐—ฟ๐—ผ๐—ผ๐—ณ๐˜€, which assume at least one honest actor will challenge invalid batches.  This introduces ๐—ฑ๐—ฒ๐—น๐—ฎ๐˜†๐˜€ and ๐—ฒ๐—ฐ๐—ผ๐—ป๐—ผ๐—บ๐—ถ๐—ฐ ๐—ฟ๐—ถ๐˜€๐—ธ.

3๏ธโƒฃ ๐—™๐—ถ๐—ป๐—ฎ๐—น๐—ถ๐˜๐˜†

โœ… Citrea: Once the ZK proof is verified โ†’ itโ€™s final.
โš ๏ธ Merlin: Transactions can be ๐—ฟ๐—ฒ๐˜ƒ๐—ฒ๐—ฟ๐˜๐—ฒ๐—ฑ during a challenge period (typically several days).

4๏ธโƒฃ ๐—ข๐—ฟ๐—ฎ๐—ฐ๐—น๐—ฒ ๐——๐—ฒ๐—ฝ๐—ฒ๐—ป๐—ฑ๐—ฒ๐—ป๐—ฐ๐˜†  

๐Ÿ›‘ Merlin needs oracles and staking mechanisms to operate.  ๐Ÿง  Citrea doesnโ€™t. Everything is verified ๐—บ๐—ฎ๐˜๐—ต๐—ฒ๐—บ๐—ฎ๐˜๐—ถ๐—ฐ๐—ฎ๐—น๐—น๐˜†  through the proof.
Less complexity = better security & less trust assumptions.

5๏ธโƒฃ ๐——๐—ฎ๐˜๐—ฎ ๐—”๐˜ƒ๐—ฎ๐—ถ๐—น๐—ฎ๐—ฏ๐—ถ๐—น๐—ถ๐˜๐˜† & ๐—ฅ๐—ผ๐—ผ๐˜ ๐—–๐—ผ๐—บ๐—บ๐—ถ๐˜๐—บ๐—ฒ๐—ป๐˜ 

Both store state changes (Merkle root) on Bitcoin L1.  But Citreaโ€™s proof system ensures๐—ป๐—ผ ๐—ผ๐—ป๐—ฒ ๐—ป๐—ฒ๐—ฒ๐—ฑ๐˜€ ๐˜๐—ผ ๐—ฟ๐—ฒ-๐—ฒ๐˜…๐—ฒ๐—ฐ๐˜‚๐˜๐—ฒ  the transaction โ€” just verify the proof.

6๏ธโƒฃ ๐—˜๐—ฐ๐—ผ๐˜€๐˜†๐˜€๐˜๐—ฒ๐—บ ๐—œ๐—ป๐˜๐—ฒ๐—ด๐—ฟ๐—ฎ๐˜๐—ถ๐—ผ๐—ป

Citrea supports zk-EVM, allowing Ethereum-style smart contracts on Bitcoin using zk-rollups.

![](https://pbs.twimg.com/media/GwSOJOPXoAAGsP1.png)

XX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1946839084820996523/c:line.svg)

**Related Topics**
[bitcoin](/topic/bitcoin)
[coins layer 1](/topic/coins-layer-1)
[coins bitcoin ecosystem](/topic/coins-bitcoin-ecosystem)
[coins pow](/topic/coins-pow)

[Post Link](https://x.com/yyehazel/status/1946839084820996523)

[GUEST ACCESS MODE: Data is scrambled or limited to provide examples. Make requests using your API key to unlock full data. Check https://lunarcrush.ai/auth for authentication information.]

yyehazel Avatar yyehazel @yyehazel on x XXX followers Created: 2025-07-20 07:46:22 UTC

1๏ธโƒฃ๐‘๐จ๐ฅ๐ฅ๐ฎ๐ฉ ๐“๐ฒ๐ฉ๐ž

โœฆ Citrea = ZK-Rollup
โœฆ Merlin = Optimistic Rollup

While both scale Bitcoin, they use ๐ฏ๐ž๐ซ๐ฒ ๐๐ข๐Ÿ๐Ÿ๐ž๐ซ๐ž๐ง๐ญ ๐ฌ๐ž๐œ๐ฎ๐ซ๐ข๐ญ๐ฒ ๐š๐ฌ๐ฌ๐ฎ๐ฆ๐ฉ๐ญ๐ข๐จ๐ง๐ฌ.

2๏ธโƒฃ ๐’๐ž๐œ๐ฎ๐ซ๐ข๐ญ๐ฒ ๐€๐ซ๐œ๐ก๐ข๐ญ๐ž๐œ๐ญ๐ฎ๐ซ๐ž

Citrea uses zk-SNARKs, meaning every batch of transactions is ๐œ๐ซ๐ฒ๐ฉ๐ญ๐จ๐ ๐ซ๐š๐ฉ๐ก๐ข๐œ๐š๐ฅ๐ฅ๐ฒ ๐ฏ๐ž๐ซ๐ข๐Ÿ๐ข๐ž๐. No need to trust any external party. No waiting period. Merlin uses ๐—ณ๐—ฟ๐—ฎ๐˜‚๐—ฑ ๐—ฝ๐—ฟ๐—ผ๐—ผ๐—ณ๐˜€, which assume at least one honest actor will challenge invalid batches. This introduces ๐—ฑ๐—ฒ๐—น๐—ฎ๐˜†๐˜€ and ๐—ฒ๐—ฐ๐—ผ๐—ป๐—ผ๐—บ๐—ถ๐—ฐ ๐—ฟ๐—ถ๐˜€๐—ธ.

3๏ธโƒฃ ๐—™๐—ถ๐—ป๐—ฎ๐—น๐—ถ๐˜๐˜†

โœ… Citrea: Once the ZK proof is verified โ†’ itโ€™s final. โš ๏ธ Merlin: Transactions can be ๐—ฟ๐—ฒ๐˜ƒ๐—ฒ๐—ฟ๐˜๐—ฒ๐—ฑ during a challenge period (typically several days).

4๏ธโƒฃ ๐—ข๐—ฟ๐—ฎ๐—ฐ๐—น๐—ฒ ๐——๐—ฒ๐—ฝ๐—ฒ๐—ป๐—ฑ๐—ฒ๐—ป๐—ฐ๐˜†

๐Ÿ›‘ Merlin needs oracles and staking mechanisms to operate. ๐Ÿง  Citrea doesnโ€™t. Everything is verified ๐—บ๐—ฎ๐˜๐—ต๐—ฒ๐—บ๐—ฎ๐˜๐—ถ๐—ฐ๐—ฎ๐—น๐—น๐˜† through the proof. Less complexity = better security & less trust assumptions.

5๏ธโƒฃ ๐——๐—ฎ๐˜๐—ฎ ๐—”๐˜ƒ๐—ฎ๐—ถ๐—น๐—ฎ๐—ฏ๐—ถ๐—น๐—ถ๐˜๐˜† & ๐—ฅ๐—ผ๐—ผ๐˜ ๐—–๐—ผ๐—บ๐—บ๐—ถ๐˜๐—บ๐—ฒ๐—ป๐˜

Both store state changes (Merkle root) on Bitcoin L1. But Citreaโ€™s proof system ensures๐—ป๐—ผ ๐—ผ๐—ป๐—ฒ ๐—ป๐—ฒ๐—ฒ๐—ฑ๐˜€ ๐˜๐—ผ ๐—ฟ๐—ฒ-๐—ฒ๐˜…๐—ฒ๐—ฐ๐˜‚๐˜๐—ฒ the transaction โ€” just verify the proof.

6๏ธโƒฃ ๐—˜๐—ฐ๐—ผ๐˜€๐˜†๐˜€๐˜๐—ฒ๐—บ ๐—œ๐—ป๐˜๐—ฒ๐—ด๐—ฟ๐—ฎ๐˜๐—ถ๐—ผ๐—ป

Citrea supports zk-EVM, allowing Ethereum-style smart contracts on Bitcoin using zk-rollups.

XX engagements

Engagements Line Chart

Related Topics bitcoin coins layer 1 coins bitcoin ecosystem coins pow

Post Link

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