Download Chia 2.6.1

2.6.1 Chia blockchain 2026-3-18
What's Changed
Added
- Add BYC and CRT to default CAT list
- New inner puzzle meta-standard that has instructions for how a wallet can handle arbitrary authorization trees
- Work in Progress - PoS2 integration
- Use structured RPC errors in full_node_rpc_api
Changed
- Simplify and optimize TransactionQueue
- Use an adapted version of deficit round robin algorithm in TransactionQueue
- Forward send_transaction and cat_spend to create_signed_transaction
- Prioritize trusted peers in FullNodeAPI's send_transaction
- Add kw_only to all wallet RPC types
- Miscellaneous wallet RPC cleanups
- Tolerate quote related cost mismatch for older nodes
- Skip fetching additions and removals for non transaction blocks in FullNodeAPI's request_header_blocks
- Refactor connection handshake
- Reject unsolicited RespondCompactVDF messages
- Made log less chatty for compact proofs
- Harden full node store
- Validate QR bit in DNS seeder to only process queries
- Add missing request decorator to reject_removals_request
- Correct accounting of cost limits in offer summary computation
- Harden nodes message typechecking
- Harden the full node’s incoming connection logic
- Default to block creation 1
- Only update the fast forward state on successful validation in process_fast_forward_spends
- Bump chia_rs to 0.38.2
Fixed
- Revert accidental RPC parameter name change
- Augmented usage fix
- Blocktools double sub epoch summary hash bug
- Fix reorg edge case handling in the wallet protocol
- Prevent dangling SAVEPOINTs by shielding against cancellation
- Return RejectAdditionsRequest to wallets instead of raising an exception
- Close VDF client TCP connections properly
- Fix PendingTxCache eviction when encountering empty height buckets
Removed
- Drop support for macOS 13 (Ventura) and macOS 14 (Sonoma)