🚨 Stellar’s “Protocol 25” upgrade locks-in for 11 Feb 2025; validators must bump to stellar-core v21.0 by 28 Jan 🚨
The Stellar Development Foundation (SDF) released the official upgrade guide on 23 Dec 2024, confirming that the network will vote to activate Protocol 25 at ledger #58 750 000 (≈ 15:00 UTC 11 Feb). The hard-fork introduces five new CAPs—most notably automated market-maker (AMM) revocation and signer-sponsorship v2—while deprecating twelve legacy operations.
🔑Key points
🔹 Core changes:
CAP-0054 – AMM pool revocation: liquidity providers can permissionlessly burn pool shares and claim trapped assets without counter-party.
CAP-0055 – signer-sponsorship v2: allows multisig recovery for smart-contract wallets, cutting reserve requirement from 2 XLM to 0.1 XLM per signer.
CAP-0056 – “soroban fee-bump” native support: Soroban contracts can pay fees in any Stellar asset, removing XLM-only bottleneck.
CAP-0057 – tight-coupled validator vote: 67 % threshold reduced to 60 %, accelerating future upgrades.
CAP-0058 – memo-hash collision fix: 32-byte → 64-byte memo field to stop duplicate-hash attack vector.
🔹 Timeline: Stellar-core v21.0.0-rc1 available 30 Dec 2024; final build 21 Jan; validator cut-off 28 Jan; public testnet reset 7 Jan with full P25 feature set.
🔹 Breaking impact: Old “ManageOffer” & “CreatePassiveOffer” ops removed; Horizon v21 will reject pre-2020 tx envelopes—wallets must migrate to PathPaymentStrictSend/Receive by 1 Feb.
🔹 Reserve & fee delta: Base reserve drops 10 % (1 → 0.9 XLM); Soroban per-op fee flattened to 0.3 stroops/ins, cutting smart-contract cost ≈ 40 %.
🔹 SDK readiness: JavaScript, Go, Python and Rust SDKs tagged v12.0.0-beta; iOS & Android beta builds due 6 Jan.
🔎Why it matters
🔹 DeFi catalyst: AMM revocation fixes the “stuck-pool” problem that locked 8.6 m USDC in orphaned pools, expected to unlock dormant liquidity and boost on-chain volume.
🔹 Wallet UX: Multisig reserve cut saves average user 3–4 XLM (0.36), removing a long-cited onboarding friction point.
🔹 Soroban adoption: Fee-bump in any asset lets fintechs preload user balances without forcing XLM acquisition, accelerating enterprise pilots (DSTOQ, Franklin Templeton).
🔹 Governance speed: 60 % vote threshold halves upgrade cycle from 6 to ≈ 3 months, aligning Stellar with rapid-release cadence of rival L1s.
🚨Watch-outs
🔹 Validator lag: 7 of 35 Tier-1 validators still run v19 nodes; failure to upgrade by 28 Jan triggers automatic quorum halt, risking 2-hour downtime.
🔹 Horizon breakage: Exchanges using legacy Horizon endpoints (/paths/strict-receive) must update before 21 Jan or face 404 errors on order-book queries.
🔹 State-archive reset: Protocol 25 re-indexes ledger buckets; full-history archives (≈ 1.4 TB) must re-sync, adding 24-hour CPU spike for public archive providers.
🔹 Smart-contract replay: Soroban contracts compiled under preview-12 need re-compile with preview-13 env or risk “unsupported syscall” traps post-upgrade.
🎯Bottom line: Protocol 25 bundles critical DeFi fixes and Soroban cost-savings that could finally ignite Stellar’s long-promised smart-contract economy, but the tight 28-day validator window and legacy-op purge mean laggard nodes and custodians risk service disruption. Upgrade compliance on 11 Feb will signal whether Stellar can iterate fast enough to compete in the programmable-money race.
https://stellar.org/blog/developers/stellar-x-ray-protocol-25-upgrade-guide