---
tags: substrate
---

# Substrate change log since v1.0

Last updated: 28/01/2020

- Breaking changes:
- Enable CORS checks: #2248 #2291
- Constify storage values and type parameter: #2565 #2883 #2975 #3112 #3093 #3191
- Light client friendly events: #2491
- New sessions module & remove consensus module: #2802
- Transaction Dispatch Info / Weight: #2799 #4124
- Implement a proper generic resolution in `decl_storage!`: #2913
- Make privileged functions explicitly use `origin`: #3045
- Remove ./scripts/build.sh: #2868 #3057 #3195
- Extensible transactions (and tips): #3102 #3229
- Signed transactions now have affinity with runtime versions: #3430
- Use BABE instead of AuRa in node: #3171 #3211
- Include Genesis hash in extrinsic v3 format: #3286
- Refactor key management: #3296
- Custom runtime module errors: #3433 #3752 #4449
- Service factory refactor: #3382
- Simplify deposit_event declaration in decl_module: #3506
- `srml_support` storage reorganize: #3344
- srml-contract: Rename Contract::create to instantiate: #3645 #3649
- Change `decl_storage!` to forbid default value for `Option` types: #3682
- Transaction-Payment module: #3816
- Remove support for secp256k1 for network keys: #3897 #4234
- Substrate runtime interface 2.0: #4057
- Reorganising the repository - SRML to FRAME: #4074 #4161 #4182 #4184 #4223
- Implement all storage after prefix: #4227
- Introduce `OnReapAccount`: #4585
- Modify doublemap syntax: #4576
- Pallet session new API: #4609
- Remove default hasher: #4739
- Refactor the balances module: #4649
- Rename `StorageMap::exists` to `contains_key`: #4847
- Per-things trait: #4904
- Composite accounts: #4820
- Remove default expansion from `construct_runtime!`: #4937
- Improvements:
- Improved economic model implementation: #2912 #2854 #2882
- Use milliseconds for timestamp resolution: #3210
- Update to schnorrkel `0.8.0`: #3267
- Use optimized append and len storage methods in SRML: #3071
- Change `decl_storage!` to import the storage traits automatically: #3674
- Use EncodeLike for storages traits: #3676
- Add SECP256k1/ECDSA support for transaction signing: #3861
- Add the code for compiling node-cli for WASM-browser: #3974
- Typed chain state queries over rpc: #4079
- Weight annotation for block hooks: #4058
- Publish the dispatch info in extrinsic events: #4148
- Support custom runtime interfaces in native executor: #4129
- Add instrumentation, with performance profiling capability: #4132
- Economic fixes for democracy module: #4256
- Add linear back-off for aura slot workers: #4293
- Impl iter_prefix on DoubleMap: #4388
- Return early when fees/balances/values are zero: #4628
- `--dev` activates `--execution native` and build wasm in release mode by default: #4683
- Support `u128`/`i128` in runtime interface: #4703
- Expose information about the extrinsic in the metadata: #4774
- Allow to distinguish out of gas from other traps: #4883
- Adds fork-awareness and finalization notifications to transaction pool watchers: #4740
- New major features:
- Offline worker
- BABE consensus
- babe: Introduce secondary slots (Aurababeous): #3380
- Polite Grandpa
- Contract state rent system: #2230 #2502
- Inherent digests: #2466
- Weight annotation: #3157
- Submit (& sign) extrinsics from the runtime: #3514
- Consensus: Proof of Work: #3473
- sr-arithmetic: #3743 #3456 #3799
- ChainSpec extensions: #3692
- Runtime logging: #3821
- Integrate Wasmtime for runtime execution: #3869 #4542
- Substrate EVM #3927 #4261
- Grafana integration: #3913
- Introduce prefixed storage with enumeration: #4185
- Manual Seal block production engine: #4143
- New minor features:
- CLI `--ws-max-connections`: #2632
- CLI `--grandpa-voter`: #3018
- CLI `--execution-all`: #3098
- CLI `--disable-default-bootnode`: #3888
- CLI `--sentry`: #3959
- CLI `--sentry-nodes`: #4285
- CLI `--max-parallel-downloads`: #4045
- CLI `--no-private-ipv4`: #4042
- CLI `check-block`: #4240
- CLI `--unsafe-rpc-external` / `--unsafe-ws-external`: #4448
- CLI subcommand `generate-node-key`: #4884
- CLI subcommand `inspect`: #4697
- RPC `author_removeExtrinsic`: #2732
- RPC `author_insertKey`: #3296
- RPC `author_rotateKeys`: #3337
- RPC `account_nextIndex` / Able to implement custom RPC: #3109
- RPC `contracts_call` for calling a contract: #3563
- RPC `contract_getStorage`: #3944
- RPC `rpc_methods` to get all RPC methods: #3613
- RPC `system_nodeRoles`: #3719
- RPC `payment_queryInfo`: #3876
- RPC `system_addReservedPeer` / `system_removeReservedPeer`: #4423
- RPC `author_hasKey` / `author_hasSessionKeys`: #4720
- RPC `offchain_localStorageSet` / `offchain_localStorageGet`: #4694
- RPC `contracts_rentProjection`: #4754
- RPC `state_getKeysPaged`: #4718
- RPC `state_getPairs`: #4803
- RPC `babe_epochAuthorship`: #4729
- Allow batch query for block hash: #4210
- Subkey support 24-word phrases: #2827
- Allow where bounds on `decl_module!` and `decl_storage!`: #3000
- Allow sub accounts to be derived from an TypeId: #3039
- GenericAsset module: #2790
- Technical Committee: #3041
- SS58 versioning (Network IDs): #3147
- Introduce `srml-im-online`: #3079
- Pause/resume current authority set: #3068
- Expose instancing in metadata: #3188
- Declare and implement authorities endpoint: #3207
- Decouple Phragmen from Staking: #3498
- Introduce srml/scored-pool: #3381
- srml/authority-discovery: Introduce srml module to sign and verify: #3385 #3955
- srml-module: Phragmen election: #3364
- Sudo can dispatch from an account: #3604
- Split off System random functions into a new Randomness module: #3699 #3792
- Utility module for doing stuff like batch calls: #3759
- Extend Utility pallet with multisig and pseudonyms #4462
- chain spec builder: add generate mode for authority keys: #3811
- Explicitly declare decl_storage! getters as functions: #3870
- cli: disable pruning on validators #3835
- `srml-nicks` Account nicknames: #3930 #3932 #3934
- `WithdrawReason::Tip`: #3937
- Add translate API for storage values: #3947 #4052 #4555
- srml-contracts: Add ability to read substrate's storage: #4108
- Introduce efficient Hash-based RNG streamer: #4169
- Add sha2-256 hash function: #4218
- PaysFee for DispatchInfo: #4165
- Commission is stated as percent of rewards: #4243
- Introduce `VestingCurrency` trait: #4257
- decl_storage: Allow storage value builder to put no value: #4319
- `pallet-identity` More comprehensive identity system: #4326 #4401
- Add tipping into treasury: #4480
- Introduce rebond: #4374
- `pallet-society`: #4170 #4604
- Add documentation to SubmitSignedTransaction and actually make it work: #4200
- `pallet-recovery`: #4531
- Allow node to add externalities extensions: #4583
- custom weight function wrapper: #4158
- Deposit event on `frame-system::set_code`: #4726
- pallet-contracts add `ext_tombstone_deposit`: #4722
- Added GetCallMetadata for extrinsic calls: #4791
- Expose information about the extrinsic in the metadata: #4774
- Add trait to get module and call names: #4854
- impl Randomness trait for Babe: #4886
- Add support for json output in subkey: #4882
- Other changes:
- BABE
- Polite Grandpa
- Peer Set Manager for p2p reputation management
- TrieDB improvements
- Transaction factory: #2481
- Rust JSON RPC client generation: #2778
- `srml-contract` renamed to `srml-contracts`: #2905
- Contract storage limit: #3126
- Forbid declaration of float types in contracts: #3234
- srml-contracts: Deferred actions #3255
- srml-contracts: Contract calls/instantiations to return exit statuses: #3320
- Update to parity-scale-codec: #3232
- Set uncles inherent: #3317
- Pluralise newHead RPC subscription: #3463
- Do not allow zero Existential Deposit when using Balances: #4894

# polkadot.js

Changelog: https://github.com/polkadot-js/api/blob/master/CHANGELOG.md
Upgrade guide: https://github.com/polkadot-js/api/blob/master/UPGRADING.md