qtumproject/qtum v29.1

Qtum Core v29.1 – Hard Fork - Upgrade to bitcoin core 29.1 - EVM Pectra - Improvements and Bug fixes.

on GitHub

Mandatory update before Mainnet block 5483000 (Testnet block 5442000)

▸ Qtum Core upgraded to Bitcoin Core 29.1

Includes upstream updates from 27.2, 28.0, 28.1, 29.0, and 29.1.

Main highlights

• dumptxoutset RPC now requires a type argument.
• Disk logging rate-limited to 1 MiB/hour per source.
• Caps enforced for -maxmempool and -dbcache on 32-bit systems.
• Switched to the CMake build system.
• General security, translation, and performance fixes.

▸ Upgraded EVM to Pectra

Main highlights

EIP-2537 – BLS12-381 curve operations precompile

• Adds a precompiled contract for BLS12-381 elliptic-curve operations (addition, multiplication, pairing check, serialization).
• Used for zk-SNARKs and signature aggregation.
• Improves performance and reduces gas usage for zk and cross-chain workloads.

EIP-2935 – Historical Block Hashes

• Implemented on Qtum as a precompiled contract returning historical block hashes up to 8191 blocks deep.
• Matches Ethereum semantics but avoids storing hashes in state to remain compatible with Bitcoin-based consensus.
• Allows contracts to query recent hashes for verification or randomness without consensus changes.

▸ Additional Updates

• Merge PR #1044:
  • Call contract at a specified block height.
  • New RPC getcontractcode.
  • Adds createdContracts and destructedContracts fields.
  • Add verbosity = 3 to getblock RPC to return detailed transaction data including inputs and scripts.
• Updated nMinimumChainWork, defaultAssumeValid, and chainTxData.
• Added recent checkpoints for mainnet and testnet.

Fork ETA
Mainnet: Jan 12 2026 – 01:24:40 UTC (block 5483000)
Testnet: Dec 12 2025 – 00:40:14 UTC (block 5442000)

Note for Apple Silicon Users

Guide to self-sign and run Qtum-Qt.app on macOS is available here.

Hash Validation

To verify binaries, compare SHA-256 hashes after release:

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