0xhades

Blockchain Security & Infrastructure

[0xhades @0xhad3s]

Circle holds $11.43 billion of USDC reserves as cash at seven banks.

Per Circle's own 10-Q, FDIC insurance across all of it is capped at $1.8 million.

New piece on what actually holds a stablecoin at a dollar, built from the June 2026 filings.

https://t.co/CAJu4WEGbz

[0xhades @0xhad3s]

Chainlink's docs tell you to check that a price is recent before you use it.

Chainlink's own example consumer contract doesn't. It reads the price and leaves the timestamp commented out.

New piece on what sits in that gap.

https://t.co/F0pNRWLAoA

[0xhades @0xhad3s]

New article on layer 2 networks uploaded to 0xhades.

It covers who runs the sequencer, who can upgrade the contracts, and whether you can exit without permission.

On most rollups the emergency exit window is None.

https://t.co/faAzGGxWKp

[0xhades @0xhad3s]

Part 3 is live. That concludes my Solidity and EVM assembly series.

How to read contract storage with Foundry: which contract a proxy actually runs, who can upgrade it, and where a token balance is stored.

Worked against Aave and USDC on live mainnet.

https://t.co/9l1qwYUVv6

[0xhades @0xhad3s]

Part 2 of my four part Solidity and EVM assembly series is live.

I wrote pairs of functions that do the same thing, one in Solidity and one in assembly, then measured both. One saved 76 gas. The other cost 44.

Assembly is not automatically cheaper.

https://t.co/TUnxDgLzXM

[0xhades @0xhad3s]

Part 1 of my four part Solidity and EVM assembly series is live.

A twelve line contract, compiled and read instruction by instruction. It turns out `a + b` is four instructions, not one.

Starts from zero. Still worth it if you write Solidity daily.

https://t.co/LyPlR5OuDw

[0xhades @0xhad3s]

The source someone shows you is not necessarily the code at that address.

Being able to check that yourself is a skill, and it's learnable.

If you're struggling with a particular section, please don't hesitate to message me.

https://t.co/71PS2AVSv9

[0xhades @0xhad3s]

I'm starting a four part series on Solidity, the EVM, and assembly.

It starts with the basics, assuming you've never looked at an opcode, and ends on reading deployed contracts that have no published source.

Part 0 is live.

[0xhades @0xhad3s]

What's coming:

Part 1: a twelve line contract compiled and read instruction by instruction

Part 2: writing assembly yourself, when it genuinely saves gas and when it quietly costs more

Part 3: reading contracts you didn't write, and who is allowed to change them

[0xhades @0xhad3s]

Then it bought stake.

A DeezNode validator took $168.5M in delegated stake within weeks. Nearly 20% came from Marinade's liquid staking pool.

Retail LST deposits helped fund a sandwich operation running against retail.

Full breakdown:

https://t.co/pmTVrlKFPb

[0xhades @0xhad3s]

By mid-2026, more than 95% of Solana's active stake runs one company's validator client.

Jito tips are over 60% of all priority-fee volume, up from ~10% in April 2023.

None of it is in the Solana protocol. No consensus rule mentions it.

[0xhades @0xhad3s]

It made the problem less visible, not smaller.

Private mempools filled the gap. DeezNode's bot alone runs nearly half of all Solana sandwich attacks: 1.55 million in 30 days, $13.43M profit, averaging $8.67 a hit.

Pure volume and automation.

[0xhades @0xhad3s]

A Solana ETF is price exposure plus income.
A bitcoin ETF is price exposure minus a fee.

The structural point stands. The July rotation was not the trend people called it.

Full breakdown:

https://t.co/SJEo6AK9Jc

[0xhades @0xhad3s]

US spot bitcoin ETFs took in $172.4M in July. Smallest month since the products launched in January 2024.

For scale, July 2025 alone drew over $6 billion.

And that was an improvement.

[0xhades @0xhad3s]

One caveat, and it matters.

August already reversed. BTC ETFs have taken $381M in the opening days with zero outflow days, the strongest start since April. Ether is now the one bleeding.

One month of flow data is not a trend. That cuts both ways.