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CHANGELOG.md

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0.7.13

LiquidityProtection

  • Removed protection logic
  • Removed the ability to migrate positions to v3
  • Added support for settings total positions value
  • Updated withdrawal logic
  • Updated system migration to v3 logic

0.7.12

VortexBurner

  • BNT -> vBNT trades are routed through v3

0.7.11

General

  • Added support for etherscan verification

LiquidityProtection

  • Added admin functions

0.7.10

General

  • Added the StakingRewardsClaim contract & supporting scripts

0.7.9

LiquidityProtection

  • Removed checkpoint updates (gas optimization)
  • Removed subscriber notifications on add/remove liquidity (gas optimization)

0.7.7-8

LiquidityProtection

  • Added support for migration for v3

0.7.2-6

General

  • Fixed typechain exports

0.7.1

General

  • Added support for migrating positions into v3
  • Upgraded prettier and updated style/format
  • Upgraded and cleaned up CI support
  • Upgraded all dependencies

0.7.0

General

  • Major upgrade, many improvements and cleanups in preparation for v3 integration
  • Updated the dev stack/infrastructure platform from truffle to hardhat
  • Major tests upgrade for robustness and flexibility
  • Replaced auto-generated getters with private state vars + dedicated custom getters
  • Upgraded/Optimized extended math utils
  • Replaced any OpenZeppelin supported contract with the OZ version
  • Updated conventions based on the latest OpenZeppelin standard
  • Added some utility functions in various contracts for more code reuse
  • Cleaned up some terminology issues
  • Removed legacy contracts
  • Updated docs conventions - removed params/return definitions, added requirements section where appropriate
  • Added prettier auto formatting
  • Cleaned up directory structure
  • Upgraded all dependencies
  • Added CI support

StakingRewards

  • Added support for staking rewards from a specific pool (reduced gas cost option)

0.6.39

General

  • Fixed a minor issue in the test deployment script

0.6.38

LiquidityProtection

  • transferPositionAndCall replaced by transferPositionAndNotify with predefined callback interface

0.6.37

General

  • Minor cleanups

0.6.36

General

  • Updated project dependencies

0.6.35

General

  • Normalized ETH/reserve token usages (new ReserveToken contract, updated token handling across the board)

ConverterFactory

  • Allow unregistering factories

LiquidityProtection

  • Added transferPosition & transferPositionAndCall that allow owners to transfer their positions to other wallets/contracts
  • Fixed an issue that caused APR of new positions to remain at 0 in the first few days

0.6.34

General

  • Added global network settings (NetworkSettings contract)
  • Added the Vortex mechanism (global network fee logic and the VortexBurner contract)
  • Moved the native token address and more generic utils into the Utils contract
  • Removed support for Liquid Tokens
  • Removed legacy EtherToken support
  • Removed affiliate fee logic
  • Many other minor changes and cleanups

Converters

  • syncReserveBalances is now exposed
  • Updated the upgrade process with some optimizations
  • Added support for global network fees
  • Removed support for withdrawing locked tokens (simplification)
  • addLiquidityReturn updated to handle input of multiple amounts

TokenHolder

  • Added support for ETH and for withdrawing multiple tokens in a single call

0.6.33

General

  • Replaced the local ERC20Token/TokenHandler with OpenZepplin's ERC20/SafeERC20
  • Moved from npm to yarn
  • Added FixedRatePoolConverter (type 4)

StandardPoolConverter

  • Added sourceAmountAndFee function that returns the source amount and fee based on a target amount

LiquidityProtection

  • Pool spot rate is now recorded on deposit instead of the average rate

0.6.32

LiquidityProtection

  • Updated settings contract conventions

0.6.31

LiquidityProtection

  • Added support for disabling adding liquidity with a specific reserve
  • Added support for multipler event subscribers

0.6.30

LiquidityProtection

  • Added LiquidityProtectionSystemStore contract that holds the system balance/minted amounts
  • Added a dedicated wallet contract for liquidity protection

0.6.29

General

  • Replaced the local SafeMath contract with OpenZepplin's version
  • Renamed Math contract to MathEx contract to prevent conflicts

LiquidityProtection

  • Added LiquidityProtectionStats contract that holds totals & provider specific stats
  • Added an event subscriber contract that receives liquidity add/remove events

0.6.28

LiquidityProtection

  • Removed support for protecting/unprotecting existing pool tokens
  • Added a function that returns the current available space in the pool (poolAvailableSpace)

ConverterUpgrader

  • Added support for upgrading a converter with reserve tokens that revert on transfer(0)

0.6.27

General

  • Added a gas optimized standard pool converter (type 3) for 2 reserves, 50%/50% weights
  • Added Checkpoint store contract for tracking any actions that happen at a specific point in time
  • Optimized some of the generic Math functions
  • Removed legacy code
  • Added prettier to the code

ConverterRegistry

  • Creating a standard type 1 pool will result in a type 3 pool

ConverterUpgrader

  • Upgrading a standard type 1 pool will result in a new type 3 pool

LiquidityProtection

  • New flexible and more secure network token minting limit system
  • Liquidity cannot be added and removed in the same block anymore
  • Settings moved into a dedicated contract
  • Removed the high tier pool system
  • Optimized calculations to reduce potential overflows/underflows
  • Added addLiquidityFor function that allows creating a position for a different wallet
  • Removed the transferLiquidity function
  • Added on-chain tracking for when users remove liquidity
  • Fixed an issue that triggererd an exception in the poolROI view function in certain cases

0.6.26

LiquidityProtection

  • Added support for high tier pools
  • Fixed an issue in the system ratio limit

0.6.25

LiquidityProtection

  • Updated to use the TokenGovernance contract for both the network token & the governance token
  • Minor gas optimization

0.6.24

General

  • Added prettier

LiquidityProtection

  • Fixed a potential overflow exception in removeLiquidityTargetAmount
  • Binary size optimization

0.6.23

General

  • Many other minor changes and cleanups

LiquidityProtection

  • Improved accuracy of the return/fee calculations

0.6.22

LiquidityProtection

  • Fixed an issue that prevented users from adding single sided liquidity in some cases

0.6.21

LiquidityPoolV1Converter

  • Fixed an issue that caused recentAverageRate to return 0/0 for new converters

LiquidityProtection

  • Fixed an issue in removeLiquidityReturn that returned the wrong amount
  • Added support for max rate deviation

0.6.20

General

  • Added the liquidity protection mechanism

0.6.19

General

  • Moved more generic math functions into Math

ReentrancyGuard

  • Gas optimization

LiquidityPoolV1Converter

  • Recent average rate is now calculated before the conversion

0.6.18

General

  • Added Math contract with various math utilities

ERC20Token

  • Removed the approve frontrunning protection

SmartToken

  • Renamed to DSToken
  • Removed the owner's ability to disable transfers
  • Removed the owner's ability to withdraw other tokens from the contract

0.6.17

LiquidityPoolV1Converter

  • Added the ability to query the recent average rate
  • Added the ability to query the return amount for adding/removing liquidity

0.6.16

General

  • Removed binaries from the repo

ConverterRegistry

  • Fixed an issue that prevented creating a new pool if an old pool had one of the new pool's reserves

0.6.15

General

  • Updated all "contract interfaces" to real interfaces
  • Cleaned up conventions

LiquidityPoolV2Converter

  • Updated the fee structure to standard fee / oracle deviation fee

0.6.14

General

  • Upgraded contracts/solidity compiler to v0.6.12

0.6.13

LiquidityPoolV2Converter

  • Allow the owner to update the amplification factor

0.6.12

LiquidityPoolV2Converter

  • Allow the owner to update the external rate propagation time

PriceOracle

  • Fixed lastUpdateTime to return the latest time between the oracles

0.6.11

LiquidityPoolV2Converter

  • Updated weights/fees logic

LiquidTokenConverter

  • Initial purchase/supply now takes the reserve weight into account

0.6.10

LiquidityPoolV2Converter

  • Fixed an issue in the upgrade process

0.6.9

LiquidityPoolV2Converter

  • Upgraded dynamic fee mechanism

0.6.8

Converters

  • Updated version number

0.6.7

General

  • Added LiquidityPoolV2Converter
  • Added a Chainlink price oracle proxy contract
  • Moved converter types into dedicated folders
  • Many other minor changes and cleanups

Converters

  • Added the converter type to the Activation event

Converter Factory

  • Added support for custom factory for converter types
  • Added the converter type to the NewConverter event

0.6.6

General

  • Updated truffle to 5.1.32
  • Updated web3.js to 1.2.9
  • Switched to ganache-core
  • Updated to the newest solidity-coverage and run it as a plugin
  • Added solhint and added npm scripts
  • Added eslint
  • Upgraded tests to expect and chai, use BN instead of BigNumber and avoid state sharing via before() callbacks
  • Various tests updates and improvements

0.6.5

General

  • Renamed rate related functions to targetAmount for clarity

LiquidityPoolV1Converter

  • Fixed an issue when adding liquidity that only added a fraction of the requested amount

0.6.4

TokenHandler

  • Fixed a security vulnerability that allowed any wallet to invoke the transfer functions

0.6.3

BancorNetwork

  • Fixed an issue in the backward compatibility layer for older converters

ConverterUpgrader

  • Fixed an issue in the backward compatibility layer for older converters

0.6.2

BancorNetwork

  • Added backward compatibility to rateByPath

0.6.1

ConverterRegistry

  • Fixed a bug that prevented removal of older converters from the registry

0.6.0

General

  • Major upgrade, many improvements and design changes (new backward compatibility layer still supports most of older interfaces)
  • Major gas optimization on conversions
  • New design to allow different converter types
  • Removed EtherToken functionality in favor of using ETH directly (the contract is still used for backward compatibility)
  • Added revert error messages
  • Improved support for non standard token transfer/transferFrom functions
  • Many other minor changes, bug fixes and cleanups

BancorNetwork

  • Added a new conversionPath function
  • getReturnByPath is now replaced by rateByPath
  • all conversion functions are now replaced by convertByPath

BancorConverter

  • Converters are now broken into different contracts with ConverterBase as the base contract
  • New entity introduced - Converter Anchor. The anchor rerpresents the converter id and is the non upgradable component of the converter
  • New converterType function to allow identifying the converter
  • There are now two major converter types - Liquid Token Converter & Liquidity Pool Converter
  • Add/Remove liquidity functions moved to the new liquidity pool converter
  • New add/remove liquidity functions - addLiquidity now accepts the reserve amounts instead of the pool token amount
  • It's now possible to add liquidity to empty liquidity pools
  • It's no longer possible to convert into pool tokens (these can only be acquired by adding liquidity)
  • Conversions cannot be executed directly against converters anymore - all conversions should be executed through the BancorNetwork contract
  • New TokenRateUpdate event that gets emitted for rate changes between any two tokens (reserve/reserve, pool/reserve etc.)
  • PriceDataEvent is now deprecated in favor of the new TokenRateUpdate event

ConverterRegistry

  • Added newConverter factory function to simplify converter creation process
  • Converters cannot be added to the registry directly anymore, instead use the new factory function
  • Converters are now accessible by their anchors instead of by their smart tokens
  • Smart token functions/events are now replaced with anchor functions/events

BancorX

  • Removed support for smart tokens for security reasons. Allowance should be used instead

0.5.19

BancorConverter

  • Added re-entrancy protection

0.5.18

BancorConverterRegistry

  • Reverted the signature change of getLiquidityPoolByReserveConfig (logic is still intact)

0.5.16

BancorConverter

  • Removed Manager permission/code
  • totalReserveRatio is now public

BancorConverterRegistry

  • Fixed a bug with identifying converters with similar configurations

0.5.15

EtherToken

  • Name & symbol are now constructor args

0.5.14

BancorNetwork

  • Removed signature/gas price limit logic

BancorConverter

  • Removed the converterType variable

BancorConverterUpgrader

  • Removed legacy converter (0.4) support

BancorFormula

  • Increased liquidation cost precision

EtherToken

  • Added depositTo function for direct depositing to another account for gas optimization

0.5.13

BancorNetwork

  • Added a new Conversion event that gets emitted for any conversion in the network

BancorConverter

  • Owners cannot disable conversions anymore
  • Owners cannot disable conversions from specific reserves anymore
  • Removed the virtual balance mechanism

0.5.12

General

  • Better handling for non standard ERC20 tokens's transfer function (removed NonStandardTokenRegistry contract, gas optimization)

BancorConverterRegistry

  • Fixed an issue that allowed adding duplicate pools to the registry in certain situations

0.5.11

General

  • Added the BancorNetworkPathFinder contract, now compatible with the new converter registry contract

BancorConverter

  • Added a dedicated getReserveRatio function

BancorConverterRegistry

  • Now enforces only a single liquidity pool for each reserve configuration
  • Disabled converters are now considered invalid (can be removed by anyone)
  • Added a utility function that returns a list of converters for a given list of smart tokens

0.5.8-10

General

  • Minor cleanups

0.5.7

General:

  • Added ContractRegistryClient contract for common contract registry behavior and cleaner access, and updated all registry clients

BancorConverterRegistry:

  • Full redesign - it now allows iterating over different primitives in the network and does not require re-adding converters after a converter upgrade

BancorConverter:

  • Added support for fund/liquidate in non 50%/50% reserves converters

BancorFormula:

  • Added calculations for fund/liquidate in non 50%/50% reserves

0.5.6

BancorConverter:

  • Updated the virtual balances mechanism - it now scales all reserve balances by the same factor and is only relevant to cross reserve conversions

0.5.5

BancorNetwork:

  • Added affiliate fee support in xConvert & xConvertPrioritized

SmartTokenController:

  • Removed the disableTokenTransfers function

0.5.4

General:

  • Added a testnet/private chain deployment script/migration
  • Updated the readme file with more tutorials on the various scripts

ERC20Token:

  • Cleaned up construction, added the total supply as a constructor arg

0.5.3

General:

  • Cleaned up all compilation warnings

BancorConverter:

  • Added a protection against activation with no token supply

0.5.2

BancorConverterRegistry

  • Added events when adding/removing tokens
  • Removing the last converter of a token will now also remove the token from the list of tokens

0.5.1

General:

  • Added the BancorNetworkPathFinder contract

BancorConverterFactory

  • Added utility function latestConverterAddress to return the latest converter for a given token
  • Removing the last converter for a token will now also remove the token from the list of tokens

0.5.0

General:

  • Terminology changes (Connector -> Reserve, Weight -> Ratio)
  • Compiler upgraded to 0.4.26
  • Truffle upgraded to 4.1.16

0.4.12

General:

  • Fixed line breaks in documentation

0.4.11

BancorNetwork:

  • Added support for affilate fee

BancorConverter:

  • Minor cleanups / bug fixes

0.4.10

BancorX:

  • Added support for any ERC20/Smart token (was previously BNT specific)

0.4.9

Converters:

  • Fixed a rounding error in the fund function

0.4.8

General:

  • Added support for auto generation of documentation
  • Updated contract documentation
  • Cleaned up tests

Network:

  • Fixed an issue that caused getReturnByPath to fail if the path contained old converters

0.4.7

  • added the ConverterRegistry contract

0.4.6

General:

  • Added support for non standard ERC-20 tokens
  • Added NonStandardTokenRegistry contract to support non standard ERC-20 tokens

Network:

  • Removed convertForMultiple

0.4.5

General:

  • Minor cleanups / bug fixes
  • Moved to SafeMath

Converters:

  • Added completeXConversion function to convert from BNT to another token by providing an id rather than amount
  • Changed the version from bytes32 to uint16
  • quickConvert and quickConvertPrioritized now call convertForPrioritized3 in the BancorNetwork contract
  • Renamed isPurchaseEnabled to isSaleEnabled in connector token struct, and validated that sales are enabled for the fromConnector rather than the toConnector in the conversion functions

Network:

  • verifyTrustedSender function argument amount renamed to customVal
  • Added xConvert and xConvertPrioritized functions which converts any token to BNT and transfers the result to BancorX
  • Added validateXConversion function to get around the 16 variable function limit in the xConvert function
  • Added convertForPrioritized3 with backwards compatibility to now receive a custom value along with the amount for verifying trusted senders

0.4.4

General:

  • Minor cleanups / bug fixes
  • Upgraded compiler version to 0.4.24

Converters:

  • Replaced the setRegistry function with updateRegistry function
  • Removed quickBuyPath from converter
  • getReturn now returns the fee as a separate return value
  • Converter owner can no longer withdraw connector tokens while the converter is active
  • Converter owner can no longer transfer the token ownership once the converter is active
  • Added a dedicated upgrade function for easier upgrades
  • Added a fund function for increasing liquidity atomically
  • Added a liquidate function for decreasing liquidity atomically even when conversions are disabled

Registry:

  • Fixed item removal

0.4.3

General:

  • Upgraded compiler version to 0.4.23
  • Updated all contracts to make use of the new constructor keyword
  • Removed more local contract dependencies and replaced them with querying the registry

Utilities:

  • ContractRegistry - added support for querying the number of items/contract names in the registry

0.4.2

General:

  • Added more predefined contract ids

Bug fixes:

  • Fixed a crash in BancorConverterUpgrader when trying to upgrade converters with virtual connector balance

0.4.1

Bug fixes:

  • Fixed BancorNetwork contract backward compatibility with older converters

0.4.0

General:

  • Restructured contract folders
  • Upgraded compiler version to 0.4.21
  • Replaced from testrpc with ganache
  • Other minor cleanups

Converters:

  • Gas cost optimizations when converting between 2 connectors, now uses an optimized dedicated formula calculation
  • Conversions now trigger 2 separate events - Conversion & PriceDataUpdate
  • Added support for multiple conversions in a single atomic transaction
  • Added support for conversion whitelist
  • Removed the BancorConverterExtensions contract and replaced it with the new ContractRegistry contract
  • Added the ability for the owner to also set the manager
  • Renamed BancorQuickConverter to BancorNetwork to more accurately reflect its place as the entry point for bancor related functionality
  • Removed EIP228 related functionality and deprecated the EIP

Utilities:

  • Added support for contract registry to minimize dependencies between contracts
  • Added support for a "feature flags" contract that allows contracts to dynamically query other contracts for supported features