XRP Ledger server operators must upgrade to xrpld version 3.4.0, released on September 16, 2026, to prevent their servers from becoming amendment-blocked when new network rules enforce.

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Mainnet activation timing for Glamsterdam will be announced once decided by client teams following post-testnet reviews.

Hoodi node operators must update both execution and consensus clients, and validators must upgrade beacon nodes and validator clients before October 26, 2026.

The Ethereum Foundation's confirmed Hoodi client releases as of October 17, 2026, include Besu 26.10.0, Grandine, Lighthouse, Erigon 3.3.0, Go-ethereum, and Reth.

On October 16, 2026, NEAR Protocol announced plans to apply AI-assisted formal verification to its network protocol, core smart contracts, and developer tools using Lean.

The fixCleanup3_4_0 amendment closes a loophole that could allow account roles authorized only to burn tokens to create new tokens under specific conditions.

NEAR Protocol explained that production formal verification requires mathematically representing software, specifying required security properties, and constructing proofs that cover deployed code implementations.

NEAR Protocol co-founder Illia Polosukhin stated that formal verification research aims to provide mathematical guarantees for software behavior to mitigate security risks from AI-generated code and attacker exploitation tools.

Signed Linux installation packages for xrpld version 3.4.0 are distributed through the XRPL Foundation.

The XRP Ledger evaluates amendment activation decisions at designated intervals called flag ledgers, occurring every 256 ledgers.

Sophon developers cited annual operational costs of approximately $3.4 million to maintain the standalone blockchain as the primary cause for shutdown, projecting approximately $3 million in annual operational savings

Sophon experienced minimal activity on its blockchain after disabling new deposits on June 25, 2026

Borderless.xyz participated in Mastercard's Start Path blockchain accelerator and an August 2026 Crypto Credential pilot involving Infinia, Walapay, and Koywe

In January 2026, JPMorgan announced plans to deploy JPM Coin natively on the Canton Network as part of its strategy to explore multiple blockchain environments

JPMorgan participates alongside over 30 banks in helping Swift define governance and features for Swift's blockchain-based ledger, though JPMorgan was not listed among 17 banks preparing live transaction pilots

Under Solana's Alpenglow Votor system, Solana validators communicate directly off-chain to aggregate votes into cryptographic certificates rather than recording each vote as an onchain transaction

Transitioning to Solana's Alpenglow Votor system requires validator operators representing at least 82% of total staked SOL to sign a genesis certificate

Coinbase and Marqeta said Coinbase will handle custody of customers' stablecoin balances, manage conversion between digital tokens and fiat currency, and run on-chain settlement on its Base blockchain

Solana research firm Anza spent 18 months developing the Alpenglow upgrade prior to its scheduled mainnet migration.

Solana validators must run client software built on Agave 4.3.0 during migration, as Firedancer and Frankendancer client implementations are unsupported for initial activation.

Validator operators must maintain at least 0.8 SOL above their rent-exempt balance to cover a participation fee or face exclusion from voting in epoch 1064.