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# Changelog

## Unreleased

### API Breaking

* (crypto) [\#559](https://github.com/cosmos/ethermint/pull/559) Refactored crypto package in preparation for the SDK's Stargate release:
  * `crypto.PubKeySecp256k1` and `crypto.PrivKeySecp256k1` are now `ethsecp256k1.PubKey` and `ethsecp256k1.PrivKey`, respectively
  * Moved SDK `SigningAlgo` implementation for Ethermint's Secp256k1 key to `crypto/hd` package.

### Bug Fixes

* (crypto) [\#577](https://github.com/cosmos/ethermint/pull/577) Fix `BIP44HDPath` that did not prepend `m/` to the path. This now uses the `DefaultBaseDerivationPath` variable from go-ethereum to ensure addresses are consistent.

## [v0.2.1] - 2020-09-30

### Features

* (rpc) [\#552](https://github.com/cosmos/ethermint/pull/552) Implement Eth Personal namespace `personal_importRawKey`.

### Bug fixes

* (keys) [\#554](https://github.com/cosmos/ethermint/pull/554) Fix private key derivation.
* (app/ante) [\#550](https://github.com/cosmos/ethermint/pull/550) Update ante handler nonce verification to accept any nonce greater than or equal to the expected nonce to allow to successive transactions.

## [v0.2.0] - 2020-09-24

### State Machine Breaking

* (app) [\#540](https://github.com/cosmos/ethermint/issues/540) Chain identifier's format has been changed to match the Cosmos `chainID` [standard](https://github.com/ChainAgnostic/CAIPs/blob/master/CAIPs/caip-5.md), which is required for IBC. The epoch number of the ID is used as the EVM `chainID`.

### API Breaking

* (types) [\#503](https://github.com/cosmos/ethermint/pull/503) The `types.DenomDefault` constant for `"aphoton"` has been renamed to `types.AttoPhoton`.

### Improvements

* (types) [\#504](https://github.com/cosmos/ethermint/pull/504) Unmarshal a JSON `EthAccount` using an Ethereum hex address in addition to Bech32.
* (types) [\#503](https://github.com/cosmos/ethermint/pull/503) Add `--coin-denom` flag to testnet command that sets the given coin denomination to SDK and Ethermint parameters.
* (types) [\#502](https://github.com/cosmos/ethermint/pull/502) `EthAccount` now also exposes the Ethereum hex address in `string` format to clients.
* (types) [\#494](https://github.com/cosmos/ethermint/pull/494) Update `EthAccount` public key JSON type to `string`.
* (app) [\#471](https://github.com/cosmos/ethermint/pull/471) Add `x/upgrade` module for managing software updates.
* (`x/evm`) [\#458](https://github.com/cosmos/ethermint/pull/458) Define parameter for token denomination used for the EVM module.
* (`x/evm`) [\#443](https://github.com/cosmos/ethermint/issues/443) Support custom Ethereum `ChainConfig` params.
* (types) [\#434](https://github.com/cosmos/ethermint/issues/434) Update default denomination to Atto Photon (`aphoton`).
* (types) [\#515](https://github.com/cosmos/ethermint/pull/515) Update minimum gas price to be 1.

### Bug Fixes

* (ante) [\#525](https://github.com/cosmos/ethermint/pull/525) Add message validation decorator to `AnteHandler` for `MsgEthereumTx`.
* (types) [\#507](https://github.com/cosmos/ethermint/pull/507) Fix hardcoded `aphoton` on `EthAccount` balance getter and setter.
* (types) [\#501](https://github.com/cosmos/ethermint/pull/501) Fix bech32 encoding error by using the compressed ethereum secp256k1 public key.
* (`x/evm`) [\#496](https://github.com/cosmos/ethermint/pull/496) Fix bugs on `journal.revert` and `CommitStateDB.Copy`.
* (types) [\#480](https://github.com/cosmos/ethermint/pull/480) Update [BIP44](https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki) coin type to `60` to satisfy [EIP84](https://github.com/ethereum/EIPs/issues/84).
* (types) [\#513](https://github.com/cosmos/ethermint/pull/513) Fix simulated transaction bug that was causing a consensus error by unintentionally affecting the state.

## [v0.1.0] - 2020-08-23

### Improvements

* (sdk) [\#386](https://github.com/cosmos/ethermint/pull/386) Bump Cosmos SDK version to [v0.39.1](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.39.1)
* (`x/evm`) [\#181](https://github.com/cosmos/ethermint/issues/181) Updated EVM module to the recommended module structure.
* (app) [\#188](https://github.com/cosmos/ethermint/issues/186)  Misc cleanup:
  * (`x/evm`) Rename `EthereumTxMsg` --> `MsgEthereumTx` and `EmintMsg` --> `MsgEthermint` for consistency with SDK standards
  * Updated integration and unit tests to use `EthermintApp` as testing suite
  * Use expected `Keeper` interface for `AccountKeeper`
  * Replaced `count` type in keeper with `int`
  * Add SDK events for transactions
* [\#236](https://github.com/cosmos/ethermint/pull/236) Changes from upgrade:
  * (`app/ante`) Moved `AnteHandler` implementation to `app/ante`
  * (keys) Marked `ExportEthKeyCommand` as **UNSAFE**
  * (`x/evm`) Moved `BeginBlock` and `EndBlock` to `x/evm/abci.go`
* (`x/evm`) [\#255](https://github.com/cosmos/ethermint/pull/255) Add missing `GenesisState` fields and support `ExportGenesis` functionality.
* [\#272](https://github.com/cosmos/ethermint/pull/272) Add `Logger` for evm module.
* [\#317](https://github.com/cosmos/ethermint/pull/317) `GenesisAccount` validation.
* (`x/evm`) [\#319](https://github.com/cosmos/ethermint/pull/319) Various evm improvements:
  * Add transaction `[]*ethtypes.Logs` to evm's `GenesisState` to persist logs after an upgrade.
  * Remove evm `CodeKey` and `BlockKey`in favor of a prefix `Store`.
  * Set `BlockBloom` during `EndBlock` instead of `BeginBlock`.
  * `Commit` state object and `Finalize` storage after `InitGenesis` setup.
* (rpc) [\#325](https://github.com/cosmos/ethermint/pull/325) `eth_coinbase` JSON-RPC query now returns the node's validator address.

### Features

* (build) [\#378](https://github.com/cosmos/ethermint/pull/378) Create multi-node, local, automated testnet setup with `make localnet-start`.
* (rpc) [\#330](https://github.com/cosmos/ethermint/issues/330) Implement `PublicFilterAPI`'s `EventSystem` which subscribes to Tendermint events upon `Filter` creation.
* (rpc) [\#231](https://github.com/cosmos/ethermint/issues/231) Implement `NewBlockFilter` in rpc/filters.go which instantiates a polling block filter
  * Polls for new blocks via `BlockNumber` rpc call; if block number changes, it requests the new block via `GetBlockByNumber` rpc call and adds it to its internal list of blocks
  * Update `uninstallFilter` and `getFilterChanges` accordingly
  * `uninstallFilter` stops the polling goroutine
  * `getFilterChanges` returns the filter's internal list of block hashes and resets it
* (rpc) [\#54](https://github.com/cosmos/ethermint/issues/54), [\#55](https://github.com/cosmos/ethermint/issues/55)
  Implement `eth_getFilterLogs` and `eth_getLogs`:
  * For a given filter, look through each block for transactions. If there are transactions in the block, get the logs from it, and filter using the filterLogs method
  * `eth_getLogs` and `eth_getFilterChanges` for log filters use the same underlying method as `eth_getFilterLogs`
  * update `HandleMsgEthereumTx` to store logs using the ethereum hash
* (app) [\#187](https://github.com/cosmos/ethermint/issues/187) Add support for simulations.

### Bug Fixes

* (rpc) [\#305](https://github.com/cosmos/ethermint/issues/305) Update `eth_getTransactionCount` to check for account existence before getting sequence and return 0 as the nonce if it doesn't exist.
* (`x/evm`) [\#319](https://github.com/cosmos/ethermint/pull/319) Fix `SetBlockHash` that was setting the incorrect height during `BeginBlock`.
* (`x/evm`) [\#176](https://github.com/cosmos/ethermint/issues/176) Updated Web3 transaction hash from using RLP hash. Now all transaction hashes exposed are amino hashes:
  * Removes `Hash()` (RLP) function from `MsgEthereumTx` to avoid confusion or misuse in future.