feat!: introduce epochs (#1660)

* cleanup ./changelog entries

* rebase

* fix!: Validation of SlashAcks fails due to marshaling to Bech32  (backport #1570) (#1577)

fix!: Validation of SlashAcks fails due to marshaling to Bech32  (#1570)

* add different Bech32Prefix for consumer and provider

* separate app encoding and params

* remove ConsumerValPubKey from ValidatorConfig

* update addresses in tests

* make SlashAcks consistent across chains

* add comments for clarity

* Regenerate traces

* Fix argument order

* set bech32prefix for provider to cosmos

* add changelog entries

* add consumer-double-downtime e2e test

* update nightly-e2e workflow

* fix typo

* add consumer-double-downtime to testConfigs

* remove changes on provider

* skip invalid SlashAcks

* seal the config

* clear the outstanding downtime flag for new vals

* add info on upgrading to v4.0.0

* fix upgrade handler

* fix changeover e2e test

* Update tests/e2e/config.go

Co-authored-by: Philip Offtermatt <57488781+p-offtermatt@users.noreply.github.com>

* Update tests/e2e/config.go

Co-authored-by: Philip Offtermatt <57488781+p-offtermatt@users.noreply.github.com>

* add AccountPrefix to ChainConfig

* fix docstrings

* update AccountAddressPrefix in app.go

* fix consumer-misb e2e test

---------

Co-authored-by: Philip Offtermatt <p.offtermatt@gmail.com>
Co-authored-by: Simon Noetzlin <simon.ntz@gmail.com>
Co-authored-by: Philip Offtermatt <57488781+p-offtermatt@users.noreply.github.com>
(cherry picked from commit 8604692)

Co-authored-by: Marius Poke <marius.poke@posteo.de>

* docs: update changelog for v4.0.0 (#1578)

update changelog

* docs: prepare for v4.0.0 (#1581)

* unclog build

* update release notes

* update release date

* added proto declaration

* temp commit

* temp commit

* more changes

* first commit

* add param and fix tests

* reduce epoch size for e2e

* clean up

* mbt fix

* fix diff bug

* cleaning up

* cleaning up

* cleaning up

* cleaning up

* cleaning up

* cleaning up

* added more tests

* more fixes

* nit fixes

* cleaning up

* increase downtime by one block

* fix logs

* took into account Marius' comments

* tiny fixes

* Update x/ccv/provider/keeper/params.go

Co-authored-by: Simon Noetzlin <simon.ntz@gmail.com>

* use Bech32 addresses as keys for maps

* refactor nextBlocks(epoch) to nextEpoch

* fixed comment

* Remove new block creation during consumer chain setup

* Revert "Remove new block creation during consumer chain setup"

This reverts commit 85a52b7.

* added simple param test

* added upper bound and addressed a comment

* Add another edge case for diffing

* used smarted solution (based on Philip's comment) for diffing validators

* refactor!: remove key-assignment replacements (#1672)

* initial commit

* removed KeyAssignmentReplacementsKey

* refactor: simplify key-assignment logic (#1684)

* fixed typo: depreciated to deprecated

---------

Co-authored-by: Marius Poke <marius.poke@posteo.de>

* add the epoch param in the docs

---------

Co-authored-by: mpoke <marius.poke@posteo.de>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
Co-authored-by: Simon Noetzlin <simon.ntz@gmail.com>
Co-authored-by: Philip Offtermatt <p.offtermatt@gmail.com>

tests/mbt/driver/mbt_test.go

@@ -198,6 +198,12 @@ func RunItfTrace(t *testing.T, path string) {
 		driver.endAndBeginBlock("provider", 1*time.Nanosecond)
 	}
 
+	// set `BlocksPerEpoch` to 10: a reasonable small value greater than 1 that prevents waiting for too
+	// many blocks and slowing down the tests
+	providerParams := driver.providerKeeper().GetParams(driver.providerCtx())
+	providerParams.BlocksPerEpoch = 10
+	driver.providerKeeper().SetParams(driver.providerCtx(), providerParams)
+
 	// remember the time offsets to be able to compare times to the model
 	// this is necessary because the system needs to do many steps to initialize the chains,
 	// which is abstracted away in the model
@@ -255,6 +261,7 @@ func RunItfTrace(t *testing.T, path string) {
 			stats.numStartedChains += len(consumersToStart)
 			stats.numStops += len(consumersToStop)
 
+<<<<<<< HEAD
 			// get the block height in the model
 			modelHeight := ProviderHeight(currentModelState)
 
@@ -282,6 +289,24 @@ func RunItfTrace(t *testing.T, path string) {
 				UpdateProviderClientOnConsumer(t, driver, consumer.ChainId)
 			}
 			driver.endAndBeginBlock("provider", time.Duration(timeAdvancement)*time.Second-1*time.Nanosecond)
+=======
+			// we need at least 2 blocks, because for a packet sent at height H, the receiving chain
+			// needs a header of height H+1 to accept the packet
+			// so, we do `blocksPerEpoch` time advancements with a very small increment,
+			// and then increment the rest of the time
+			runningConsumersBefore := driver.runningConsumers()
+
+			// going through `blocksPerEpoch` blocks to take into account an epoch
+			blocksPerEpoch := driver.providerKeeper().GetBlocksPerEpoch(driver.providerCtx())
+			for i := int64(0); i < blocksPerEpoch; i = i + 1 {
+				driver.endAndBeginBlock("provider", 1*time.Nanosecond)
+			}
+			for _, consumer := range driver.runningConsumers() {
+				UpdateProviderClientOnConsumer(t, driver, consumer.ChainId)
+			}
+
+			driver.endAndBeginBlock("provider", time.Duration(timeAdvancement)*time.Second-time.Nanosecond*time.Duration(blocksPerEpoch))
+>>>>>>> adae28ee (feat!: introduce epochs (#1660))
 
 			runningConsumersAfter := driver.runningConsumers()