## 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](https://github.com/cosmos/cosmos-sdk/issues/1983) --print-response now defaults to true in commands that create and send a transaction
    * [cli] [\#1983](https://github.com/cosmos/cosmos-sdk/issues/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](https://github.com/cosmos/cosmos-sdk/issues/2061) changed proposalID in governance REST endpoints to proposal-id
    * [cli] [\#2014](https://github.com/cosmos/cosmos-sdk/issues/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] [\#2221](https://github.com/cosmos/cosmos-sdk/issues/2221) All commands that
    utilize a validator's operator address must now use the new Bech32 prefix,
    `cosmosvaloper`.
    * [cli] [\#2190](https://github.com/cosmos/cosmos-sdk/issues/2190) `gaiacli init --gen-txs` is now `gaiacli init --with-txs` to reduce confusion

* Gaia
    * Make the transient store key use a distinct store key. [#2013](https://github.com/cosmos/cosmos-sdk/pull/2013)
    * [x/stake] [\#1901](https://github.com/cosmos/cosmos-sdk/issues/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](https://github.com/cosmos/cosmos-sdk/issues/2040) Validator
    operator type has now changed to `sdk.ValAddress`
    * [x/stake] [\#2221](https://github.com/cosmos/cosmos-sdk/issues/2221) New
    Bech32 prefixes have been introduced for a validator's consensus address and
    public key: `cosmosvalcons` and `cosmosvalconspub` respectively. Also, existing Bech32 prefixes have been
    renamed for accounts and validator operators:
      * `cosmosaccaddr` / `cosmosaccpub` => `cosmos` / `cosmospub`
      * `cosmosvaladdr` / `cosmosvalpub` => `cosmosvaloper` / `cosmosvaloperpub`
    * [x/stake] [#1013] TendermintUpdates now uses transient store
    
* SDK
    * [core] [\#1807](https://github.com/cosmos/cosmos-sdk/issues/1807) Switch from use of rational to decimal
    * [types] [\#1901](https://github.com/cosmos/cosmos-sdk/issues/1901) Validator interface's GetOwner() renamed to GetOperator()
    * [x/slashing] [#2122](https://github.com/cosmos/cosmos-sdk/pull/2122) - Implement slashing period
    * [types] [\#2119](https://github.com/cosmos/cosmos-sdk/issues/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)
    * [simulation] Remove log and testing.TB from Operation and Invariants, in favor of using errors \#2282
    * [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)
    * [baseapp] [\#1921](https://github.com/cosmos/cosmos-sdk/issues/1921) Add minimumFees field to BaseApp.
    * [store] Change storeInfo within the root multistore to use tmhash instead of ripemd160 \#2308
    * [codec] \#2324 All referrences to wire have been renamed to codec. Additionally, wire.NewCodec is now codec.New().
    * [types] \#2343 Make sdk.Msg have a names field, to facilitate automatic tagging.

* Tendermint

FEATURES

* Gaia REST API (`gaiacli advanced rest-server`)
  * [gaia-lite] Endpoints to query staking pool and params
  * [gaia-lite] [\#2110](https://github.com/cosmos/cosmos-sdk/issues/2110) Add support for `simulate=true` requests query argument to endpoints that send txs to run simulations of transactions
  * [gaia-lite] [\#966](https://github.com/cosmos/cosmos-sdk/issues/966) Add support for `generate_only=true` query argument to generate offline unsigned transactions
  * [gaia-lite] [\#1953](https://github.com/cosmos/cosmos-sdk/issues/1953) Add /sign endpoint to sign transactions generated with `generate_only=true`.
  * [gaia-lite] [\#1954](https://github.com/cosmos/cosmos-sdk/issues/1954) Add /broadcast endpoint to broadcast transactions signed by the /sign endpoint.

* 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](https://github.com/cosmos/cosmos-sdk/issues/2040) Add `--bech` to `gaiacli keys show` and respective REST endpoint to
  provide desired Bech32 prefix encoding
  * [cli] [\#2047](https://github.com/cosmos/cosmos-sdk/issues/2047) [\#2306](https://github.com/cosmos/cosmos-sdk/pull/2306) Passing --gas=simulate 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](https://github.com/cosmos/cosmos-sdk/issues/2047) The --gas-adjustment flag can be used to adjust the estimate obtained via the simulation triggered by --gas=simulate.
  * [cli] [\#2110](https://github.com/cosmos/cosmos-sdk/issues/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] [\#2204](https://github.com/cosmos/cosmos-sdk/issues/2204) Support generating and broadcasting messages with multiple signatures via command line:
    * [\#966](https://github.com/cosmos/cosmos-sdk/issues/966) Add --generate-only flag to build an unsigned transaction and write it to STDOUT.
    * [\#1953](https://github.com/cosmos/cosmos-sdk/issues/1953) New `sign` command to sign transactions generated with the --generate-only flag.
    * [\#1954](https://github.com/cosmos/cosmos-sdk/issues/1954) New `broadcast` command to broadcast transactions generated offline and signed with the `sign` command.

* Gaia
  * [cli] #2170 added ability to show the node's address via `gaiad tendermint show-address`
  * [cli] [\#1921] (https://github.com/cosmos/cosmos-sdk/issues/1921)
    * New configuration file `gaiad.toml` is now created to host Gaia-specific configuration.
    * New --minimum_fees/minimum_fees flag/config option to set a minimum fee.

* SDK
  * [querier] added custom querier functionality, so ABCI query requests can be handled by keepers
  * [simulation] [\#1924](https://github.com/cosmos/cosmos-sdk/issues/1924) allow operations to specify future operations
  * [simulation] [\#1924](https://github.com/cosmos/cosmos-sdk/issues/1924) Add benchmarking capabilities, with makefile commands "test_sim_gaia_benchmark, test_sim_gaia_profile"
  * [simulation] [\#2349](https://github.com/cosmos/cosmos-sdk/issues/2349) Add time-based future scheduled operations to simulator

* 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](https://github.com/cosmos/cosmos-sdk/issues/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)
    * [genesis] \#2229 Ensure that there are no duplicate accounts or validators in the genesis state.
    * Add SDK validation to `config.toml` (namely disabling `create_empty_blocks`) \#1571
    * \#1941(https://github.com/cosmos/cosmos-sdk/issues/1941) Version is now inferred via `git describe --tags`.

* 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](https://github.com/cosmos/cosmos-sdk/issues/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, \#2281 Update IAVL dependency to v0.11.0
    * [simulation] Make timestamps randomized [#2153](https://github.com/cosmos/cosmos-sdk/pull/2153)
    * [simulation] Make logs not just pure strings, speeding it up by a large factor at greater block heights \#2282
    * [simulation] Add a concept of weighting the operations \#2303
    * [simulation] Logs get written to file if large, and also get printed on panics \#2285
    * [gaiad] \#1992 Add optional flag to `gaiad testnet` to make config directory of daemon (default `gaiad`) and cli (default `gaiacli`) configurable
    * [x/stake] Add stake `Queriers` for Gaia-lite endpoints. This increases the staking endpoints performance by reusing the staking `keeper` logic for queries. [#2249](https://github.com/cosmos/cosmos-sdk/pull/2149)

* Tendermint

BUG FIXES

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

* Gaia CLI  (`gaiacli`)
    * [cli] [\#1997](https://github.com/cosmos/cosmos-sdk/issues/1997) Handle panics gracefully when `gaiacli stake {delegation,unbond}` fail to unmarshal delegation.
    * [cli] [\#2265](https://github.com/cosmos/cosmos-sdk/issues/2265) Fix JSON formatting of the `gaiacli send` command.

* Gaia
  * [x/stake] Return correct Tendermint validator update set on `EndBlocker` by not
  including non previously bonded validators that have zero power. [#2189](https://github.com/cosmos/cosmos-sdk/issues/2189)

* SDK
    * [\#1988](https://github.com/cosmos/cosmos-sdk/issues/1988) Make us compile on OpenBSD (disable ledger) [#1988] (https://github.com/cosmos/cosmos-sdk/issues/1988)
    * [\#2105](https://github.com/cosmos/cosmos-sdk/issues/2105) Fix DB Iterator leak, which may leak a go routine.
    * [ledger] [\#2064](https://github.com/cosmos/cosmos-sdk/issues/2064) Fix inability to sign and send transactions via the LCD by
    loading a Ledger device at runtime.
    * [\#2158](https://github.com/cosmos/cosmos-sdk/issues/2158) Fix non-deterministic ordering of validator iteration when slashing in `gov EndBlocker`
    * [simulation] \#1924 Make simulation stop on SIGTERM

* Tendermint