Author: Jason Nelson Compiled by: Luffy, Foresight News summary Ethereum will undergo the Fusaka upgrade in December 2025, which will bring data scaling, DoS protection, and development tools. Peer Data Availability Sampling (PeerDAS) increases data block (blob) throughput by 8 times by "sampling data instead of storing complete data on full nodes". The new EIPs will set blob fees, limit block size, and add features such as pre-acknowledgment and P-256 signature support. The next major upgrade to the Ethereum network is imminent. This upgrade, named Fusaka (short for Fulu-Osaka), is scheduled to launch in December 2025 and will make significant adjustments to both the execution and consensus layers of Ethereum. The Fusaka upgrade is another milestone for Ethereum since the 2022 merger. The Shapela upgrade in 2023 introduced staking ETH for withdrawal; the Dencun upgrade in 2024 introduced prototype Danksharding technology and blobs; and the Pectra upgrade in 2025 improved validator flexibility and Layer 2 interoperability. According to the roadmap, the Fusaka upgrade aims to expand data capacity, enhance resistance to DoS attacks, and introduce new tools for developers and users. This upgrade has far-reaching implications. Fusaka is not a minor patch; it redesigns Ethereum's data availability management, blob pricing, and transaction protection mechanisms. Its success will depend on Ethereum's ability to scale to meet the growing demands of Layer 2 networks without causing network splits or excessively burdening node operators. PeerDAS: Sampling, rather than storing, all data The core feature of the Fusaka upgrade is PeerDAS, a new way of handling blobs. In Ethereum, a blob is a temporary data packet introduced with the prototype Danksharding technology in the Dencun upgrade. It allows rollups to submit large amounts of transaction data to the mainnet at low cost, thereby improving scalability without permanently increasing the blockchain state. This ensures redundancy, but it can also create bottlenecks as demand grows. In the current model, every full node in Ethereum must store all Layer 2 network blobs committed to the chain. PeerDAS changes this logic. Each node only needs to store a portion of the blob (approximately one-eighth) and relies on cryptographic reconstruction techniques to fill in the missing data fragments. This design verifies data availability through random sampling with an extremely low error probability of only one in 10²⁰ to 10²⁴. Through this distributed storage method, Ethereum can theoretically increase blob throughput by 8 times without requiring node operators to upgrade hardware or bandwidth. Rollups, which rely on blobs to publish compressed transaction data, are expected to be the most direct beneficiaries. blob's economy and flexibility The Fusaka upgrade also reshaped the pricing and management mechanisms for blobs. A key change is EIP-7918, which introduces a minimum reserve fee for blobs. Under the current rules, when execution layer gas fees dominate, blob prices can drop to near zero, leading to inefficient usage. The minimum reserve fee ensures that there is always a baseline cost for blob usage, forcing Layer 2 to pay for the storage and bandwidth it consumes. Another mechanism is EIP-7892, which introduces a fork that only adjusts blob parameters. This allows Ethereum clients to adjust blob throughput without a full hard fork, aiming to give developers the flexibility to respond to unpredictable Layer 2 demands without waiting for the next planned upgrade. Strengthen attack and defense Scaling up also means expanding Ethereum's attack surface. The Fusaka upgrade includes a series of adjustments to limit extreme scenarios and protect the network from DoS attacks: EIP-7823: Limits the input size of MODEXP operations to 8192 bits; EIP-7825: Sets the maximum gas consumption per transaction to 2²⁴ units; EIP-7883: Improves gas costs for large indices in MODEXP to better match computational workload. EIP-7934: Limits the execution layer block size to 10MB. These adjustments collectively reduce the risk of client overload, propagation stagnation, or network instability caused by extreme transactions or very large blocks. New tools for users and developers The Fusaka upgrade also focuses on improving ease of use. For users, EIP-7917 introduces pre-confirmation support. This allows wallets and applications to preview the validator proposal schedule, enabling users to lock in the certainty that their transactions will be included in subsequent blocks, thereby reducing latency and uncertainty regarding transaction confirmation. For developers, the Fusaka upgrade adds two important new features: CLZ opcode is suitable for cryptographic algorithms and contract optimization. EIP-7951 provides native secp256r1 (P-256) signature verification. This is an elliptic curve signature commonly used in hardware devices and mobile systems, and its inclusion will improve compatibility and account abstraction capabilities. These adjustments aim to lower the barrier to entry for application developers and pave the way for new wallet designs and security models. ETH Holders Should Know For ordinary Ethereum users, no action is required for the Fusaka upgrade. Account balances, tokens, and applications will function normally. The official Ethereum website emphasizes that users should be wary of scams requesting ETH upgrades or transfers; such actions are not required for the upgrade. The primary responsibility falls on the validators and node operators, who must synchronously upgrade both the execution and consensus layer clients. Coordination is crucial: if validators are out of sync, the network may face downtime or temporary forks. Following a series of successful testnet activations, the Fusaka upgrade is scheduled to launch on the Ethereum mainnet on December 3, 2025. Fusaka's upgraded Ethereum future The Fusaka upgrade is one of the boldest moves on Ethereum's roadmap since the merger. It attempts to achieve three major goals simultaneously—increased blob capacity, enhanced defenses, and updated developer tools—through a single coordinated release. Testing and development are underway, with the client team focusing on PeerDAS performance, blob pricing models, and compatibility between the execution and consensus layer software. If the upgrade is successful, Fusaka is expected to be a turning point for Ethereum in preparing for the next wave of Layer 2 network adoption and enhancing its scalability.Author: Jason Nelson Compiled by: Luffy, Foresight News summary Ethereum will undergo the Fusaka upgrade in December 2025, which will bring data scaling, DoS protection, and development tools. Peer Data Availability Sampling (PeerDAS) increases data block (blob) throughput by 8 times by "sampling data instead of storing complete data on full nodes". The new EIPs will set blob fees, limit block size, and add features such as pre-acknowledgment and P-256 signature support. The next major upgrade to the Ethereum network is imminent. This upgrade, named Fusaka (short for Fulu-Osaka), is scheduled to launch in December 2025 and will make significant adjustments to both the execution and consensus layers of Ethereum. The Fusaka upgrade is another milestone for Ethereum since the 2022 merger. The Shapela upgrade in 2023 introduced staking ETH for withdrawal; the Dencun upgrade in 2024 introduced prototype Danksharding technology and blobs; and the Pectra upgrade in 2025 improved validator flexibility and Layer 2 interoperability. According to the roadmap, the Fusaka upgrade aims to expand data capacity, enhance resistance to DoS attacks, and introduce new tools for developers and users. This upgrade has far-reaching implications. Fusaka is not a minor patch; it redesigns Ethereum's data availability management, blob pricing, and transaction protection mechanisms. Its success will depend on Ethereum's ability to scale to meet the growing demands of Layer 2 networks without causing network splits or excessively burdening node operators. PeerDAS: Sampling, rather than storing, all data The core feature of the Fusaka upgrade is PeerDAS, a new way of handling blobs. In Ethereum, a blob is a temporary data packet introduced with the prototype Danksharding technology in the Dencun upgrade. It allows rollups to submit large amounts of transaction data to the mainnet at low cost, thereby improving scalability without permanently increasing the blockchain state. This ensures redundancy, but it can also create bottlenecks as demand grows. In the current model, every full node in Ethereum must store all Layer 2 network blobs committed to the chain. PeerDAS changes this logic. Each node only needs to store a portion of the blob (approximately one-eighth) and relies on cryptographic reconstruction techniques to fill in the missing data fragments. This design verifies data availability through random sampling with an extremely low error probability of only one in 10²⁰ to 10²⁴. Through this distributed storage method, Ethereum can theoretically increase blob throughput by 8 times without requiring node operators to upgrade hardware or bandwidth. Rollups, which rely on blobs to publish compressed transaction data, are expected to be the most direct beneficiaries. blob's economy and flexibility The Fusaka upgrade also reshaped the pricing and management mechanisms for blobs. A key change is EIP-7918, which introduces a minimum reserve fee for blobs. Under the current rules, when execution layer gas fees dominate, blob prices can drop to near zero, leading to inefficient usage. The minimum reserve fee ensures that there is always a baseline cost for blob usage, forcing Layer 2 to pay for the storage and bandwidth it consumes. Another mechanism is EIP-7892, which introduces a fork that only adjusts blob parameters. This allows Ethereum clients to adjust blob throughput without a full hard fork, aiming to give developers the flexibility to respond to unpredictable Layer 2 demands without waiting for the next planned upgrade. Strengthen attack and defense Scaling up also means expanding Ethereum's attack surface. The Fusaka upgrade includes a series of adjustments to limit extreme scenarios and protect the network from DoS attacks: EIP-7823: Limits the input size of MODEXP operations to 8192 bits; EIP-7825: Sets the maximum gas consumption per transaction to 2²⁴ units; EIP-7883: Improves gas costs for large indices in MODEXP to better match computational workload. EIP-7934: Limits the execution layer block size to 10MB. These adjustments collectively reduce the risk of client overload, propagation stagnation, or network instability caused by extreme transactions or very large blocks. New tools for users and developers The Fusaka upgrade also focuses on improving ease of use. For users, EIP-7917 introduces pre-confirmation support. This allows wallets and applications to preview the validator proposal schedule, enabling users to lock in the certainty that their transactions will be included in subsequent blocks, thereby reducing latency and uncertainty regarding transaction confirmation. For developers, the Fusaka upgrade adds two important new features: CLZ opcode is suitable for cryptographic algorithms and contract optimization. EIP-7951 provides native secp256r1 (P-256) signature verification. This is an elliptic curve signature commonly used in hardware devices and mobile systems, and its inclusion will improve compatibility and account abstraction capabilities. These adjustments aim to lower the barrier to entry for application developers and pave the way for new wallet designs and security models. ETH Holders Should Know For ordinary Ethereum users, no action is required for the Fusaka upgrade. Account balances, tokens, and applications will function normally. The official Ethereum website emphasizes that users should be wary of scams requesting ETH upgrades or transfers; such actions are not required for the upgrade. The primary responsibility falls on the validators and node operators, who must synchronously upgrade both the execution and consensus layer clients. Coordination is crucial: if validators are out of sync, the network may face downtime or temporary forks. Following a series of successful testnet activations, the Fusaka upgrade is scheduled to launch on the Ethereum mainnet on December 3, 2025. Fusaka's upgraded Ethereum future The Fusaka upgrade is one of the boldest moves on Ethereum's roadmap since the merger. It attempts to achieve three major goals simultaneously—increased blob capacity, enhanced defenses, and updated developer tools—through a single coordinated release. Testing and development are underway, with the client team focusing on PeerDAS performance, blob pricing models, and compatibility between the execution and consensus layer software. If the upgrade is successful, Fusaka is expected to be a turning point for Ethereum in preparing for the next wave of Layer 2 network adoption and enhancing its scalability.

        Highlights:  US prosecutors requested a 12-year prison sentence for Do Kwon after the Terra collapse. Terraform’s $40 billion downfall caused huge losses and sparked a long downturn in crypto markets.  Do Kwon will face sentencing on December 11 and must give up $19 million in earnings.   US prosecutors have asked a judge to give Do Kwon, Terraform Labs co-founder, a 12-year prison sentence for his role in the remarkable $40 billion collapse of the Terra and Luna tokens. The request also seeks to finalize taking away Kwon’s criminal earnings.  The court filing came in New York’s Southern District on Thursday. This is about four months after Kwon admitted guilt on two charges: wire fraud and conspiracy to defraud. Prosecutors said Kwon caused more losses than Samuel Bankman-Fried, Alexander Mashinsky, and Karl Sebastian Greenwood combined.  U.S. prosecutors have asked a New York federal judge to sentence Terraform Labs co-founder Do Kwon to 12 years in prison, calling his role in the 2022 TerraUSD collapse a “colossal” fraud that triggered broader crypto-market failures, including the downfall of FTX. Sentencing is… — Wu Blockchain (@WuBlockchain) December 5, 2025  Terraform Collapse Shakes Crypto Market Authorities explained that Terraform’s collapse affected the entire crypto market. They said it helped trigger what is now called the ‘Crypto Winter.’ The filing stressed that Kwon’s conduct harmed many investors and the broader crypto world. On Thursday, prosecutors said Kwon must give up just over $19 million. They added that they will not ask for any additional restitution. They said: “The cost and time associated with calculating each investor-victim’s loss, determining whether the victim has already been compensated through the pending bankruptcy, and then paying out a percentage of the victim’s losses, will delay payment and diminish the amount of money ultimately paid to victims.” Authorities will sentence Do Kwon on December 11. They charged him in March 2023 with multiple crimes, including securities fraud, market manipulation, money laundering, and wire fraud. All connections are tied to his role at Terraform. After Terra fell in 2022, authorities lost track of Kwon until they arrested him in Montenegro on unrelated charges and sent him to the U.S. Do Kwon’s Legal Case and Sentencing In April last year, a jury ruled that both Terraform and Kwon committed civil fraud. They found the company and its co-founder misled investors about how the business operated and its finances. Jay Clayton, U.S. Attorney for the Southern District of New York, submitted the sentencing request in November.  TERRA STATEMENT: “We are very disappointed with the verdict, which we do not believe is supported by the evidence. We continue to maintain that the SEC does not have the legal authority to bring this case at all, and we are carefully weighing our options and next steps.” — Zack Guzmán  (@zGuz) April 5, 2024  The news of Kwon’s sentencing caused Terraform’s token, LUNA, to jump over 40% in one day, from $0.07 to $0.10. Still, this rise remains small compared to its all-time high of more than $19, which the ecosystem reached before collapsing in May 2022. In a November court filing, Do Kwon’s lawyers asked for a maximum five-year sentence. They argued for a shorter term partly because he could face up to 40 years in prison in South Korea, where prosecutors are also pursuing a case against him. The legal team added that even if Kwon serves time in the U.S., he would not be released freely. He would be moved from prison to an immigration detention center and then sent to Seoul to face pretrial detention for his South Korea charges.    eToro Platform    Best Crypto Exchange   Over 90 top cryptos to trade Regulated by top-tier entities User-friendly trading app 30+ million users    9.9   Visit eToro eToro is a multi-asset investment platform. The value of your investments may go up or down. Your capital is at risk. Don’t invest unless you’re prepared to lose all the money you invest. This is a high-risk investment, and you should not expect to be protected if something goes wrong.