## PENDING

BREAKING CHANGES

* Gaia REST API (`gaiacli advanced rest-server`)
    * [x/stake] Validator.Owner renamed to Validator.Operator

* Gaia CLI  (`gaiacli`)
    * [x/stake] Validator.Owner renamed to Validator.Operator
    * [cli] unsafe_reset_all, show_validator, and show_node_id have been renamed to unsafe-reset-all, show-validator, and show-node-id
    * [cli] \#1983 --print-response now defaults to true in commands that create and send a transaction
    * [cli] \#1983 you can now pass --pubkey or --address to gaiacli keys show to return a plaintext representation of the key's address or public key for use with other commands
    * [cli] \#2061 changed proposalID in governance REST endpoints to proposal-id
    * [cli] \#2014 `gaiacli advanced` no longer exists - to access `ibc`, `rest-server`, and `validator-set` commands use `gaiacli ibc`, `gaiacli rest-server`, and `gaiacli tendermint`, respectively
    * [makefile] `get_vendor_deps` no longer updates lock file it just updates vendor directory. Use `update_vendor_deps` to update the lock file. [#2152](https://github.com/cosmos/cosmos-sdk/pull/2152)
    * [cli] \#2190 `gaiacli init --gen-txs` is now `gaiacli init --with-txs` to reduce confusion
    * \#2040 All commands that utilize a validator's address must now use the new
    bech32 prefix, `cosmosval`. A validator's Tendermint signing key and address
    now use a new bech32 prefix, `cosmoscons`.

* Gaia
    * Make the transient store key use a distinct store key. [#2013](https://github.com/cosmos/cosmos-sdk/pull/2013)
    * [x/stake] \#1901 Validator type's Owner field renamed to Operator; Validator's GetOwner() renamed accordingly to comply with the SDK's Validator interface.
    * [docs] [#2001](https://github.com/cosmos/cosmos-sdk/pull/2001) Update slashing spec for slashing period
    * [x/stake, x/slashing] [#1305](https://github.com/cosmos/cosmos-sdk/issues/1305) - Rename "revoked" to "jailed"
    * [x/stake] [#1676] Revoked and jailed validators put into the unbonding state
    * [x/stake] [#1877] Redelegations/unbonding-delegation from unbonding validator have reduced time
    * [x/stake] \#2040 Validator operator type has now changed to `sdk.ValAddress`
      * A new bech32 prefix has been introduced for Tendermint signing keys and
        addresses, `cosmosconspub` and `cosmoscons` respectively.
    
* SDK
    * [core] \#1807 Switch from use of rational to decimal
    * [types] \#1901 Validator interface's GetOwner() renamed to GetOperator()
    * [x/slashing] [#2122](https://github.com/cosmos/cosmos-sdk/pull/2122) - Implement slashing period
    * [types] \#2119 Parsed error messages and ABCI log errors to make them more human readable.
    * [simulation] Rename TestAndRunTx to Operation [#2153](https://github.com/cosmos/cosmos-sdk/pull/2153)
    * [tools] Removed gocyclo [#2211](https://github.com/cosmos/cosmos-sdk/issues/2211)
    * [baseapp] Remove `SetTxDecoder` in favor of requiring the decoder be set in baseapp initialization. [#1441](https://github.com/cosmos/cosmos-sdk/issues/1441)

* Tendermint


FEATURES

* Gaia REST API (`gaiacli advanced rest-server`)
  * [lcd] Endpoints to query staking pool and params
  * [lcd] \#2110 Add support for `simulate=true` requests query argument to endpoints that send txs to run simulations of transactions
  * [lcd] \#966 Add support for `generate_only=true` query argument to generate offline unsigned transactions

* Gaia CLI  (`gaiacli`)
  * [cli] Cmds to query staking pool and params
  * [gov][cli] #2062 added `--proposal` flag to `submit-proposal` that allows a JSON file containing a proposal to be passed in
  * \#2040 Add `--bech` to `gaiacli keys show` and respective REST endpoint to
  provide desired Bech32 prefix encoding
  * [cli] \#2047 Setting the --gas flag value to 0 triggers a simulation of the tx before the actual execution. The gas estimate obtained via the simulation will be used as gas limit in the actual execution.
  * [cli] \#2047 The --gas-adjustment flag can be used to adjust the estimate obtained via the simulation triggered by --gas=0.
  * [cli] \#2110 Add --dry-run flag to perform a simulation of a transaction without broadcasting it. The --gas flag is ignored as gas would be automatically estimated.
  * [cli] \#966 Add --generate-only flag to build an unsigned transaction and write it to STDOUT.

* Gaia
  * [cli] #2170 added ability to show the node's address via `gaiad tendermint show-address`

* SDK
  * [querier] added custom querier functionality, so ABCI query requests can be handled by keepers
  * [simulation] \#1924 allow operations to specify future operations
  * [simulation] \#1924 Add benchmarking capabilities, with makefile commands "test_sim_gaia_benchmark, test_sim_gaia_profile"

* Tendermint


IMPROVEMENTS
* [tools] Improved terraform and ansible scripts for infrastructure deployment
* [tools] Added ansible script to enable process core dumps

* Gaia REST API (`gaiacli advanced rest-server`)
    * [x/stake] \#2000 Added tests for new staking endpoints

* Gaia CLI  (`gaiacli`)
    * [cli] #2060 removed `--select` from `block` command
    * [cli] #2128 fixed segfault when exporting directly after `gaiad init`

* Gaia
    * [x/stake] [#2023](https://github.com/cosmos/cosmos-sdk/pull/2023) Terminate iteration loop in `UpdateBondedValidators` and `UpdateBondedValidatorsFull` when the first revoked validator is encountered and perform a sanity check.
    * [x/auth] Signature verification's gas cost now accounts for pubkey type. [#2046](https://github.com/tendermint/tendermint/pull/2046)
    * [x/stake] [x/slashing] Ensure delegation invariants to jailed validators [#1883](https://github.com/cosmos/cosmos-sdk/issues/1883).
    * [x/stake] Improve speed of GetValidator, which was shown to be a performance bottleneck. [#2046](https://github.com/tendermint/tendermint/pull/2200)
* SDK
    * [tools] Make get_vendor_deps deletes `.vendor-new` directories, in case scratch files are present.
    * [spec] Added simple piggy bank distribution spec
    * [cli] \#1632 Add integration tests to ensure `basecoind init && basecoind` start sequences run successfully for both `democoin` and `basecoin` examples.
    * [store] Speedup IAVL iteration, and consequently everything that requires IAVL iteration. [#2143](https://github.com/cosmos/cosmos-sdk/issues/2143)
    * [store] \#1952 Update IAVL dependency to v0.10.0
    * [simulation] Make timestamps randomized [#2153](https://github.com/cosmos/cosmos-sdk/pull/2153)

* Tendermint

BUG FIXES

* Gaia REST API (`gaiacli advanced rest-server`)

* Gaia CLI  (`gaiacli`)
    * [cli] \#1997 Handle panics gracefully when `gaiacli stake {delegation,unbond}` fail to unmarshal delegation.

* Gaia

* SDK
    * \#1988 Make us compile on OpenBSD (disable ledger) [#1988] (https://github.com/cosmos/cosmos-sdk/issues/1988)
    * \#2105 Fix DB Iterator leak, which may leak a go routine.
    * [ledger] \#2064 Fix inability to sign and send transactions via the LCD by
    loading a Ledger device at runtime.
    * \#2158 Fix non-deterministic ordering of validator iteration when slashing in `gov EndBlocker`

* Tendermint