opentensor/subtensor v3.1.0

on GitHub

Yuma Consensus v3 (available for all subnets)

• Per-bond EMA scaling: individual & sparse-mode bonds now adapt via exponential moving
  averages for smoother rewards
• Refactored α-parameters (including new sigmoid-steepness tuning) for fine-grained consensus
  control
• Monte Carlo scenario tests & map_consensus.py integration tests validate retention guarantees
  under adversarial conditions
• On-chain toggle event & ABI support to enable/disable Yuma3 per subnet for easy rollbacks
• #1593

Notes for Subnet Owners

• Yuma 3 should be beneficial and safe to use in model verification subnets (specifically subnets which guarantee that a change in miner performance happens with a knowledge commitment), provided the bond reset flag is used correctly.
• It will distribute dividends to the validators more fairly than Yuma 2 did and Liquid Alpha 2.0 allows the subnet owners to disincentivize weight copying.

Generic Crowdloan Pallet (live for public testing)

• Launch generic crowdloans via a simple balance-transfer + arbitrary extrinsic
  wrapper—supports create, contribute, withdraw, refund & finalize flows
• Enforce a 500-contributor cap to prevent unbounded loops and track counts for benchmarking
• Hardened withdraw logic: only the original contributor can withdraw, and creator’s initial
  deposit is locked until dissolution
• #1503

Notes

The MEV-resistant staking PRs have been pulled back for now while we address some issues pointed out by the community but should be in an upcoming release

Full PR List

• Backpropagate hotfixes 5/27/2025 in #1689 by @sam0x17
• update readme in evm-test in #1657 by @open-junius
• fix everything (devnet) in #1669 by @sam0x17
• [Fix] [testnet] allow burn reg with SN token enabled == false in #1652 by @camfairchild
• Ensure stake threshold is respected when handing out vpermits in #1629 by @keithtensor
• Add UidLookupPrecompile address to used_address in #1628 by @keithtensor
• not check rate limit for reduce child take in #1624 by @open-junius
• Fix up a comment to reflect what the code is doing in #1643 by @keithtensor
• Add BigRaw Commitments Variant in #1638 by @JohnReedV
• Add rustdocs to GH workflow in #1625 by @keithtensor
• Disable(comment) aggregated stake extrinsics in #1641 by @shamil-gadelshin
• Remove fee payment for associate_evm_key in #1640 by @keithtensor
• Multiple fields per commitment in #1633 by @JohnReedV
• remove the duplicated variant from the type info in #1626 by @l0r1s
• Move patch from workflow to sh file in #1622 by @basfroman
• Validate-benchmarks Job Only Respects skip-validate-benchmarks in #1611 by @JohnReedV
• [Feat] reset bonds with commitment in #1612 by @camfairchild
• Upgrade Polkadot SDK to stable2409-7. in #1607 by @l0r1s
• [Feat] Yuma Consensus v3 in #1593 by @camfairchild
• make Dockerfile more secure in #1610 by @sam0x17
• Crowdloan max contributors limit to avoid unbounded work in #1591 by @l0r1s
• Introduce SameSubnetId error for move and swap stake extrinsics. in #1588 by @shamil-gadelshin
• add event for yuma3 toggle in #1605 by @camfairchild
• feat/roman/extend-patch-for-localnet-docker-image in #1603 by @basfroman
• Ensure we only reset BondsMovingAverage to 975000 only if it exceeds in #1598 by @keithtensor
• [fix] add to StakingHotkeys on inc stake in #1596 by @camfairchild
• Remove Deprecated Commitments Storage in #1595 by @JohnReedV
• Benchmark All Pallets in #1585 by @JohnReedV
• Add start-call patch for non-fast-blocks node in localnet Docker image in #1592 by @basfroman
• Introduce ZeroMaxAmount error for add_stake_limit extrinsic. in #1577 by @shamil-gadelshin
• Add precompile to allow for UID lookup when provided with EVM address in #1518 by @keithtensor
• allow reschedule failed coldkey swap in #1580 by @open-junius
• Fix crowdloan logic issues in #1587 by @l0r1s
• use SubnetIdentity instead of SubnetName for name of SN in #1501 by @camfairchild
• Upgrade Subtensor Benchmarking to V2 in #1584 by @JohnReedV
• Add precompiles for add/remove stake limit in #1552 by @camfairchild
• Skip-Validate-Benchmark Label Reruns CI in #1574 by @JohnReedV
• upgrade to rust 1.86 🦀 in #1575 by @sam0x17
• Feat/crowdloan pallet in #1503 by @l0r1s
• Make BondsMovingAverage and MaxBurn root only in #1573 by @keithtensor
• Extrinsic for setting sn owner hotkey in #1513 by @gztensor
• Update README.md in #1533 by @dedyshkaPexto
• docs: fix broken Substrate docs link in #1536 by @mdqst
• docs: added a new CodeQL badge in #1537 by @sashaphmn
• Benchmark Action in #1562 by @JohnReedV
• Remove obsolete storage items. in #1569 by @shamil-gadelshin
• add check before sending burned register in #1568 by @open-junius
• Bump tokio from 1.40.0 to 1.44.2 in #1517 by @app/dependabot
• Add netuid to SelectiveMetagraphIndex object in #1565 by @basfroman
• Introduce stake jobs batching and delayed execution in #1525 by @shamil-gadelshin
• fix the wrong spec file path in #1561 by @open-junius
• missing pow faucet feature in #1560 by @open-junius
• Feat/aggregate stakes more extrinsics in #1549 by @shamil-gadelshin
• Delay aggregated staking jobs. in #1556 by @shamil-gadelshin
• Add retry for all extrinsic in #1554 by @open-junius
• Add Missing Benchmarks in #1555 by @JohnReedV
• Added migration to remove total hk/ck stakes this interval in #1539 by @l0r1s
• Add missing benchmarks. in #1544 by @shamil-gadelshin
• Improve EVM test stability in CI in #1548 by @open-junius
• John/Fix-Benchmarks in #1528 by @JohnReedV
• Add retry logic for Bittensor e2e test in #1546 by @basfroman
• fix a type issue in evm test in #1541 by @open-junius
• Feat/subtoken enable in #1512 by @open-junius
• add evm test to ci in #1422 by @open-junius