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# Changelog

## [Unreleased]

### Improvements

* (sdk) [\#171](https://github.com/ChainSafe/ethermint/issues/177) Bump Cosmos SDK version to [v0.38.1](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.38.1) [@fedekunze](https://github.com/fedekunze):
  * Add `x/evidence` module to ethermint app
  * Bump Go requirement to 1.14+
* (`x/evm`) [\#181](https://github.com/ChainSafe/ethermint/issues/181) Updated EVM module to the recommended module structure. [@fedekunze](https://github.com/fedekunze)
* (app) [\#188](https://github.com/ChainSafe/ethermint/issues/186)  Misc cleanup [@fedekunze](https://github.com/fedekunze):
  * (`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/ChainSafe/ethermint/pull/236) Changes from upgrade [@fedekunze](https://github.com/fedekunze)
  * (`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/ChainSafe/ethermint/pull/255) Add missing `GenesisState` fields and support `ExportGenesis` functionality.
* [\#272](https://github.com/ChainSafe/ethermint/pull/272) Add `Logger` for evm module.
* [\#317](https://github.com/ChainSafe/ethermint/pull/317) `GenesisAccount` validation.
* (`x/evm`) [\#319](https://github.com/ChainSafe/ethermint/pull/319) Verious 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/ChainSafe/ethermint/pull/325) `eth_coinbase` JSON-RPC query now returns the node's validator address.

### Features

* (rpc) [\#330](https://github.com/ChainSafe/ethermint/issues/330) Implement `PublicFilterAPI`'s `EventSystem` which subscribes to Tendermint events upon `Filter` creation.
* (rpc) [\#231](https://github.com/ChainSafe/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/ChainSafe/ethermint/issues/54), [\#55](https://github.com/ChainSafe/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/ChainSafe/ethermint/issues/187) Add support for simulations.

### Bug Fixes

* (rpc) [\#305](https://github.com/ChainSafe/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/ChainSafe/ethermint/pull/319) Fix `SetBlockHash` that was setting the incorrect height during `BeginBlock`.
* (x/evm) [\#176](https://github.com/ChainSafe/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.