Yesterday, at block 19,200,000 on the Ethereum mainnet, the Fusaka upgrade quietly went live. No fanfare, no countdown. Just a consensus switch that will reshape how Layer 2 networks pay for their data. I watched the block explorer from my small office in Nairobi, sipping cold chai, thinking about the 5,000 students we had taught about EIP-4844 in our DeFi Library project. They had asked me, "Is the blob fee market fair? Can small L2s afford to post their data?" Fusaka is supposed to answer those questions. But as I scrolled through the Ethereum Magicians forum later that night, I saw the same old pattern: hype without human context. We are celebrating a technical upgrade without asking if it serves the communities we claim to empower. This is not a critique of the code—it is a critique of our collective amnesia. I want to trace the moral path that this upgrade carves, from the blob fee market to the wallets of Kenyan artists I mentored during the Savanna Voices NFT project. Because technology, as I learned auditing ERC-20 proposals in 2017, is never neutral. It either builds libraries or empires. And I have sworn to build libraries.
Tracing the moral code behind every token.
Context: The Blob Fee Market - A Garden Built on Fees
To understand Fusaka, we must first return to the proto-danksharding upgrade, EIP-4844, implemented in March 2024. That upgrade introduced a new transaction type carrying "blobs"—binary large objects that L2 networks use to post compressed transaction data. Before blobs, L2s posted data in the calldata of regular Ethereum transactions, competing for block space with DeFi users, NFT minters, and everyone else. The result was a tragedy of the commons: during high activity, L2s paid exorbitant gas fees, slowing down the very scaling narrative they were supposed to fulfill. EIP-4844 created a separate fee market for blobs, where fees are determined by blob demand and supply (currently about 3 blobs per block). This was revolutionary—it decoupled L2 data costs from L1 execution costs, reducing them by over 90% in normal conditions.
But as I wrote in my article "Listening to the Silence Between the Blocks" last year, the blob fee market was incomplete. It had a fixed supply of slots, no dynamic adjustment, and a fee mechanism that could become congested during L2 spikes (like a popular game onboarding millions of users). L2s like Arbitrum and Optimism began to complain about unpredictable pricing. More critically, the blob fees were burned (like EIP-1559 base fees), so paying high blob fees did not directly benefit the L1 validators. This created a misalignment: validators had no incentive to expand blob capacity or optimize blob throughput. The system was static, rigid—a glass ceiling for L2 growth.
Fusaka is the response. According to the sparse technical notes (I had to dig through a GitHub repo with 47 commits from 12 core developers), the upgrade introduces a mechanism to strengthen the blob fee market. The language is vague—"strengthening the fee market" could mean adjusting the target blob count, changing the fee formula, or introducing a priority queue for blob transactions. The most plausible change is a shift from a fixed blob-per-block limit to a dynamic algorithm that adjusts based on the ratio of staked ETH to blob demand—something similar to EIP-1559's base fee adjustment but for blobs. This would allow the market to clear more efficiently during peak demand, reducing the variance in L2 costs.
But here is the part that troubles me: the upgrade also includes language about "re-inflation/deflation potential." Some analysts have interpreted this as Fusaka modifying the burn mechanism to restore ETH's deflationary trajectory, which has stalled since mid-2024. I have audited enough tokenomics to be deeply skeptical. Any change to the burn rate must be accompanied by clear parameters and a transparent security model. Without specific EIP numbers, we are essentially trading on a narrative—not a protocol. And narratives, as I learned surviving the 2022 bear market, are the first things to shatter when reality hits.
Core: The Technical Anatomy of Fusaka and Its Impact on the Human Layer
Let me walk you through the technical details that I have reconstructed from the Ethereum Magicians discussions and the core developer calls. I cannot claim certainty—these are inferences based on my experience auditing 150+ proposals for the ZEIP-20 working group. But they form the backbone of what Fusaka actually changes.
1. Dynamic Blob Supply
The current blob limit is fixed at 3 per block. Fusaka likely introduces a mechanism where the maximum blob count adjusts based on the network's usage. The adjustment factor would be driven by the ratio of blob fees collected to total fees collected, or more likely, by a congestion signal from L2 validators. This is reminiscent of the way Ethereum's gas limit was historically adjusted by miners. The effect would be that during L2-heavy periods (like a major NFT mint on Base), the blob capacity expands, keeping fees steady. During quiet periods, it contracts, preventing wasted block space. This is elegant—it makes the blob market truly a market. But it also introduces complexity: how do we prevent manipulation? A rogue L2 could flood the network with dummy blobs to expand capacity, then use the cheap space for its own transactions. The solution might be a staking requirement for blob senders, but that centralizes the process. I have seen this debate before. In 2017, we argued about whether ERC-20 transfers should require a minimum value to prevent dust attacks. The ethical answer is always the same: design for the most vulnerable. If Fusaka requires L2s to stake ETH to participate in the blob market, it will exclude small L2s—those built by communities in Kenya, Vietnam, or Colombia. We need to ensure the mechanism includes a grace period or a subsidized lane for pilot projects.
2. Fee Mechanism Evolution
Currently, blob fees are calculated via a simple formula: the fee depends on the total number of blobs in the block compared to the target (which equals the current limit divided by 2). If demand exceeds the target, the fee increases; if demand is below, the fee decreases. This is similar to EIP-1559. Fusaka might change the target from a static 3 blobs to a dynamic target tied to the 7-day median blob demand. This would smooth out fee spikes, making L2 costs more predictable. But there is a catch: if the target adjusts slowly, L2s could still experience short-term volatility. My preference would be for a faster adjustment parameter—say, a 1-day median—but the core developers prioritize stability over reactivity. This is a classic engineering trade-off. I have written about this in my article "Building Libraries Where Others Build Empires": the optimal parameter is the one that maximizes participation by the smallest economic actors. Fast adjustment favors small L2s with tight margins; slow adjustment favors large ones that can hedge fee volatility.
3. The Re-Inflation/Deflation Riddle
The most romanticized claim about Fusaka is that it "restores ETH's deflationary potential." Let me debunk this. ETH supply became deflationary in September 2022 after the Merge, thanks to the EIP-1559 burn of base fees. But as L2 activity soared, L1 base fee burning fell because users moved off the mainnet. By mid-2024, Ethereum was emitting net new ETH (about 0.3% annual inflation) due to staking rewards exceeding burns. The dream of "ultrasound money" faded. Fusaka is supposed to reverse this by increasing L1 activity—but how? If blob fees are now burned (as they are), and if Fusaka increases blob volume, then more ETH will be burned from blob fees. However, the burn rate from blob fees is currently tiny relative to staking issuance (blob fees average ~10 ETH/day vs. ~1,600 ETH/day staking rewards). To become deflationary, blob fee burn would need to increase by two orders of magnitude. That requires L2 transaction volume to explode—which is plausible if blob fees drop and L2s become ridiculously cheap. But that is a second-order effect. Fusaka itself does not burn more ETH; it only makes the market more efficient. The deflation narrative is a hope, not a guarantee.
I remember auditing a deflationary token proposal in 2018. The whitepaper promised a "forced deflation" mechanism that would increase scarcity. I found that the mechanism only worked if trading volume remained above a certain threshold—which the team had misjudged. The token collapsed six months later. I wrote in my audit report: "Code is law, but law without realistic assumptions is a trap." Fusaka's deflation potential is similarly conditional. We must tax our hopes with data, not declare victory preemptively.
Preserving the human story in digital ledgers.
Contrarian: The Pragmatism Test - When Narratives Trump Mechanics
Let me take a step back. I am a decentralist by heart—I believe in the values of transparency, permissionless access, and community sovereignty. That is why I critique Fusaka not as a cynic but as someone who has seen too many upgrades become hype vectors that harm the very people they claim to help.
Here is the contrarian angle: The biggest risk of Fusaka is not a bug or a governance exploit. It is the expectation that the upgrade will immediately solve the L2 scaling problem, leading to a wave of speculative investment in L2 tokens and ETH itself. I saw this pattern during the OpenSea royalty surrender. When the market realized that creator royalties were not enforced on-chain, the entire NFT creator economy fractured. But the hype survived for months because people believed the narrative over the mechanics. Similarly, if Fusaka does not deliver a tangible reduction in L2 costs (as measured by average L2 transaction fees), the market could punish ETH and L2 tokens in a short but painful correction. The risk is especially high because the upgrade is live now, and the first data points will emerge within a week. Traders are already positioning—I saw a 15% spike in ETH perpetual funding rates on Binance last night. That is the smell of leverage built on a story.
But there is an even deeper concern. Fusaka strengthens the blob fee market by introducing more complex economics. Complexity is the enemy of decentralization. I have argued this since my time on the ZEIP-20 working group: every added parameter creates a surface for capture by sophisticated actors. In the context of blob fees, a dynamic target can be manipulated by large L2s that control significant blob demand. They can artificially inflate fees to drive out competitors, or collude to suppress fees during their own mint periods. The Ethereum ethos relies on trustless coordination, but when the playing field becomes a game of game theory, the powerful players always have an advantage. I have seen this in DAO governance: smart contract upgrade rights sit with a few multi-sig admins, even when the code claims to be law. The same risk applies here. We need transparent audits of the new fee mechanism, not just from core developers but from independent community auditors. My organization, The Open Ledger, offered to audit the upgrade but received no response. That silence speaks volumes.
Furthermore, the idea that Fusaka will "re-deflate" ETH is a dangerous oversimplification. In a bull market, narratives can sustain themselves for months without evidence. But when the growth in L2 usage fails to reach the required multiplier, the narrative will deflate faster than the supply. I remind my students: it took five years for Ethereum to actually use EIP-1559 after it was proposed. Expecting a fee market tweak to instantly restore deflation is like expecting a single session of therapy to heal a lifetime of trauma. It takes time, iteration, and honest feedback loops.
Community over capital, always.
Takeaway: Building Libraries Where Others Build Empires
So where does this leave us? I am not suggesting we reject Fusaka. On the contrary, I believe it is a necessary step toward a mature blob market. But we must treat it as what it is: an incremental improvement, not a revolution. The true test of Fusaka will not be the ETH price reaction tomorrow or the funding rate on exchanges. It will be the median transaction fee on Arbitrum in one month. It will be the number of new L2 users from the Global South who can afford to interact with DeFi because costs have dropped. It will be the resilience of the blob fee market during a major L2 outage or demand spike.
I have lived through the hype cycles. I have seen projects raise $150 million on a whitepaper that was six pages long. I have seen NFT artists like those I worked with on Savanna Voices get priced out of their own work. I have seen educational initiatives like mine lose 60% of funding because donors chased the next shiny tool. My response is not to build empires of capital but to build libraries of understanding. Fusaka adds one more book to that library. Let us read it carefully before we celebrate.
I will end with a question I ask every student at the end of my course: "Is this upgrade making the system more accessible or more efficient for the most marginalized?" If we cannot answer yes, then we need to go back to the drawing board. For now, I answer with cautious hope—but I will be watching the blob fee charts with the same vigilance I used to audit those 150 ERC-20 proposals. The moral code behind every token must remain visible.
Tracing the moral code behind every token. Building libraries where others build empires. Listening to the silence between the blocks.