# CHANGELOG
v0.21.3 - _October 12, 2017_
* Fixed a bug causing order fills to throw `INSUFFICIENT_TAKER_ALLOWANCE` (#193)
v0.21.2 - _October 11, 2017_
* Exported `ContractEventArg` as a public type (#190)
v0.21.1 - _October 11, 2017_
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* Fixed a bug in subscriptions (#189)
v0.21.0 - _October 10, 2017_
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* Complete rewrite of subscription logic (#182)
* Subscriptions no longer return historical logs. If you want them - use `getLogsAsync`
* Subscriptions now use [ethereumjs-blockstream](https://github.com/ethereumjs/ethereumjs-blockstream) under the hood
* Subscriptions correctly handle block re-orgs (forks)
* Subscriptions correctly backfill logs (connection problems)
* They no longer setup filters on the underlying nodes, so you can use them with infura without a filter Subprovider
* Removed `ContractEventEmitter` and added `LogEvent`
* Renamed `zeroEx.token.subscribeAsync` to `zeroEx.token.subscribe`
* Added `zeroEx.token.unsubscribe` and `zeroEx.exchange.unsubscribe`
* Renamed `zeroEx.exchange.stopWatchingAllEventsAsync` to `zeroEx.exhange.unsubscribeAll`
* Renamed `zeroEx.token.stopWatchingAllEventsAsync` to `zeroEx.token.unsubscribeAll`
* Fixed the batch fills validation by emulating all balance & proxy allowance changes (#185)
v0.20.0 - _October 5, 2017_
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* Add `zeroEx.token.getLogsAsync` (#178)
* Add `zeroEx.exchange.getLogsAsync` (#178)
* Fixed fees validation when one of the tokens transferred is ZRX (#181)
v0.19.0 - _September 29, 2017_
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* Made order validation optional (#172)
* Added Ropsten testnet support (#173)
* Fixed a bug causing awaitTransactionMinedAsync to DDos backend nodes (#175)
v0.18.0 - _September 26, 2017_
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* Added `zeroEx.exchange.validateOrderFillableOrThrowAsync` to simplify orderbook pruning (#170)
v0.17.0 - _September 26, 2017_
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* Made `zeroEx.exchange.getZRXTokenAddressAsync` public (#171)
v0.16.0 - _September 20, 2017_
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* Added the ability to specify custom contract addresses to be used with 0x.js (#165)
* ZeroExConfig.exchangeContractAddress
* ZeroExConfig.tokenRegistryContractAddress
* ZeroExConfig.etherTokenContractAddress
* Added `zeroEx.tokenRegistry.getContractAddressAsync` (#165)
v0.15.0 - _September 8, 2017_
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* Added the ability to specify a historical `blockNumber` at which to query the blockchain's state when calling a token or exchange method (#161)
v0.14.2 - _September 7, 2017_
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* Fixed an issue with bignumber.js types not found (#160)
v0.14.1 - _September 7, 2017_
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* Fixed an issue with Artifact type not found (#159)
v0.14.0 - _September 6, 2017_
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* Added `zeroEx.exchange.throwLogErrorsAsErrors` method to public interface (#157)
* Fixed an issue with overlapping async intervals in `zeroEx.awaitTransactionMinedAsync` (#157)
* Fixed an issue with log decoder returning `BigNumber`s as `strings` (#157)
v0.13.0 - _September 6, 2017_
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* Made all the functions submitting transactions to the network to immediately return transaction hash (#151)
* Added `zeroEx.awaitTransactionMinedAsync` (#151)
* Added `TransactionReceiptWithDecodedLogs`, `LogWithDecodedArgs`, `DecodedLogArgs` to public types (#151)
* Added signature validation to `validateFillOrderThrowIfInvalidAsync` (#152)
v0.12.1 - _September 2, 2017_
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* Added the support for web3@1.x.x provider (#142)
* Added the optional `zeroExConfig` parameter to the constructor of `ZeroEx` (#139)
* Added the ability to specify `gasPrice` when instantiating `ZeroEx` (#139)
v0.11.0 - _August 24, 2017_
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* Added `zeroEx.token.setUnlimitedProxyAllowanceAsync` (#137)
* Added `zeroEx.token.setUnlimitedAllowanceAsync` (#137)
* Added `zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS` (#137)
v0.10.4 - _Aug 24, 2017_
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* Fixed a bug where checksummed addresses were being pulled from artifacts and not lower-cased. (#135)
v0.10.1 - _Aug 24, 2017_
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* Added `zeroEx.exchange.validateFillOrderThrowIfInvalidAsync` (#128)
* Added `zeroEx.exchange.validateFillOrKillOrderThrowIfInvalidAsync` (#128)
* Added `zeroEx.exchange.validateCancelOrderThrowIfInvalidAsync` (#128)
* Added `zeroEx.exchange.isRoundingErrorAsync` (#128)
* Added `zeroEx.proxy.getContractAddressAsync` (#130)
* Added `zeroEx.tokenRegistry.getTokenAddressesAsync` (#132)
* Added `zeroEx.tokenRegistry.getTokenAddressBySymbolIfExistsAsync` (#132)
* Added `zeroEx.tokenRegistry.getTokenAddressByNameIfExistsAsync` (#132)
* Added `zeroEx.tokenRegistry.getTokenBySymbolIfExistsAsync` (#132)
* Added `zeroEx.tokenRegistry.getTokenByNameIfExistsAsync` (#132)
* Added clear error message when checksummed address is passed to a public method (#124)
* Fixes the description of `shouldThrowOnInsufficientBalanceOrAllowance` in docs (#127)
v0.9.3 - _Aug 22, 2017_
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* Update contract artifacts to include latest Kovan and Mainnet deploys (#118)
v0.9.2 - _Aug 21, 2017_
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* *This version was unpublished because of a publishing issue.*
* Update contract artifacts to include latest Kovan and Mainnet deploys (#118)
v0.9.1 - _Aug. 16, 2017_
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* Fixed the bug causing `zeroEx.token.getBalanceAsync()` to fail if no addresses available (#120)
v0.9.0 - _Jul. 26, 2017_
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* Migrated to the new version of smart contracts (#101)
* Removed the ability to call methods on multiple authorized Exchange smart contracts (#106)
* Made `zeroEx.getOrderHashHex` a static method (#107)
* Cached `net_version` requests and invalidate the cache on calls to `setProvider` (#95)
* Renamed `zeroEx.exchange.batchCancelOrderAsync` to `zeroEx.exchange.batchCancelOrdersAsync`
* Renamed `zeroEx.exchange.batchFillOrderAsync` to `zeroEx.exchange.batchFillOrdersAsync`
* Updated to typescript v2.4 (#104)
* Fixed an issue with incorrect balance/allowance validation when ZRX is one of the tokens traded (#109)
v0.8.0 - _Jul. 4, 2017_
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* Added the ability to call methods on different authorized versions of the Exchange smart contract (#82)
* Updated contract artifacts to reflect latest changes to the smart contracts (0xproject/contracts#59)
* Added `zeroEx.proxy.isAuthorizedAsync` and `zeroEx.proxy.getAuthorizedAddressesAsync` (#89)
* Added `zeroEx.token.subscribeAsync` (#90)
* Made contract invalidation functions private (#90)
* `zeroEx.token.invalidateContractInstancesAsync`
* `zeroEx.exchange.invalidateContractInstancesAsync`
* `zeroEx.proxy.invalidateContractInstance`
* `zeroEx.tokenRegistry.invalidateContractInstance`
* Fixed the bug where `zeroEx.setProviderAsync` didn't invalidate etherToken contract's instance
v0.7.1 - _Jun. 26, 2017_
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* Added the ability to convert Ether to wrapped Ether tokens and back via `zeroEx.etherToken.depostAsync` and `zeroEx.etherToken.withdrawAsync` (#81)
v0.7.0 - _Jun. 22, 2017_
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* Added Kovan smart contract artifacts (#78)
* Started returning fillAmount from `fillOrderAsync` and `fillUpToAsync` (#72)
* Started returning cancelledAmount from `cancelOrderAsync` (#72)
* Renamed type `LogCancelArgs` to `LogCancelContractEventArgs` and `LogFillArgs` to `LogFillContractEventArgs`
v0.6.2 - _Jun. 21, 2017_
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* Reduced bundle size
* Improved documentation
v0.6.1 - _Jun. 19, 2017_
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* Improved documentation
v0.6.0 - _Jun. 19, 2017_
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* Made `ZeroEx` class accept `Web3Provider` instance instead of `Web3` instance
* Added types for contract event arguments
v0.5.2 - _Jun. 15, 2017_
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* Fixed the bug in `postpublish` script that caused that only unminified UMD bundle was uploaded to release page
v0.5.1 - _Jun. 15, 2017_
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* Added `postpublish` script to publish to Github Releases with assets.
