Hardcode centralized sequencer behavior (rollkit#1301)

## Overview
Goal is to close rollkit#1273,
rollkit#1272, and possibly
rollkit#1254 and
rollkit#1270.

## Checklist
- [ ] New and updated code has appropriate documentation
- [ ] New and updated code has new and/or updated testing
- [ ] Required CI checks are passing
- [ ] Visual proof for any user facing features like CLI or
documentation updates
- [ ] Linked issues closed with keywords


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

## Release Notes

- **New Features**
  - Added a search functionality to the app.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Connor O'Hara <connor@switchboard.xyz>
Co-authored-by: Manav Aggarwal <manavaggarwal1234@gmail.com>
Co-authored-by: Ganesha Upadhyaya <gupadhyaya@Ganeshas-MacBook-Pro-2.local>
Co-authored-by: Ganesha Upadhyaya <ganeshrvce@gmail.com>

block/manager.go

@@ -242,7 +242,7 @@ func (m *Manager) AggregationLoop(ctx context.Context, lazy bool) {
 			}
 			start := time.Now()
 			err := m.publishBlock(ctx)
-			if err != nil {
+			if err != nil && ctx.Err() == nil {
 				m.logger.Error("error while publishing block", "error", err)
 			}
 			timer.Reset(m.getRemainingSleep(start))
@@ -263,7 +263,7 @@ func (m *Manager) AggregationLoop(ctx context.Context, lazy bool) {
 			case <-timer.C:
 				// build a block with all the transactions received in the last 1 second
 				err := m.publishBlock(ctx)
-				if err != nil {
+				if err != nil && ctx.Err() == nil {
 					m.logger.Error("error while publishing block", "error", err)
 				}
 				// this can be used to notify multiple subscribers when a block has been built
@@ -397,12 +397,6 @@ func (m *Manager) trySyncNextBlock(ctx context.Context, daHeight uint64) error {
 			return fmt.Errorf("failed to save block responses: %w", err)
 		}
 
-		// SaveValidators commits the DB tx
-		err = m.saveValidatorsToStore(bHeight)
-		if err != nil {
-			return err
-		}
-
 		m.store.SetHeight(bHeight)
 
 		if daHeight > newState.DAHeight {
@@ -564,19 +558,12 @@ func (m *Manager) getCommit(header types.Header) (*types.Commit, error) {
 
 // IsProposer returns whether or not the manager is a proposer
 func (m *Manager) IsProposer() (bool, error) {
-	m.lastStateMtx.RLock()
-	defer m.lastStateMtx.RUnlock()
-	// if proposer is not set, assume self proposer
-	if m.lastState.Validators.Proposer == nil {
-		return true, nil
-	}
-
 	signerPubBytes, err := m.proposerKey.GetPublic().Raw()
 	if err != nil {
 		return false, err
 	}
 
-	return bytes.Equal(m.lastState.Validators.Proposer.PubKey.Bytes(), signerPubBytes), nil
+	return bytes.Equal(m.genesis.Validators[0].PubKey.Bytes(), signerPubBytes), nil
 }
 
 func (m *Manager) publishBlock(ctx context.Context) error {
@@ -627,7 +614,7 @@ func (m *Manager) publishBlock(ctx context.Context) error {
 		if err != nil {
 			return nil
 		}
-		block.SignedHeader.Header.NextAggregatorsHash = m.getNextAggregatorsHash()
+
 		commit, err = m.getCommit(block.SignedHeader.Header)
 		if err != nil {
 			return err
@@ -636,8 +623,6 @@ func (m *Manager) publishBlock(ctx context.Context) error {
 		// set the commit to current block's signed header
 		block.SignedHeader.Commit = *commit
 
-		block.SignedHeader.Validators = m.getLastStateValidators()
-
 		// SaveBlock commits the DB tx
 		err = m.store.SaveBlock(block, commit)
 		if err != nil {
@@ -657,8 +642,6 @@ func (m *Manager) publishBlock(ctx context.Context) error {
 		return err
 	}
 
-	block.SignedHeader.Header.NextAggregatorsHash = newState.NextValidators.Hash()
-
 	commit, err = m.getCommit(block.SignedHeader.Header)
 	if err != nil {
 		return err
@@ -667,8 +650,6 @@ func (m *Manager) publishBlock(ctx context.Context) error {
 	// set the commit to current block's signed header
 	block.SignedHeader.Commit = *commit
 
-	block.SignedHeader.Validators = m.getLastStateValidators()
-
 	// Validate the created block before storing
 	if err := m.executor.Validate(m.lastState, block); err != nil {
 		return fmt.Errorf("failed to validate block: %w", err)
@@ -702,12 +683,6 @@ func (m *Manager) publishBlock(ctx context.Context) error {
 		return err
 	}
 
-	// SaveValidators commits the DB tx
-	err = m.saveValidatorsToStore(blockHeight)
-	if err != nil {
-		return err
-	}
-
 	newState.DAHeight = atomic.LoadUint64(&m.daHeight)
 	// After this call m.lastState is the NEW state returned from ApplyBlock
 	// updateState also commits the DB tx
@@ -776,24 +751,6 @@ func (m *Manager) updateState(s types.State) error {
 	return nil
 }
 
-func (m *Manager) saveValidatorsToStore(height uint64) error {
-	m.lastStateMtx.RLock()
-	defer m.lastStateMtx.RUnlock()
-	return m.store.SaveValidators(height, m.lastState.Validators)
-}
-
-func (m *Manager) getLastStateValidators() *cmtypes.ValidatorSet {
-	m.lastStateMtx.RLock()
-	defer m.lastStateMtx.RUnlock()
-	return m.lastState.Validators
-}
-
-func (m *Manager) getNextAggregatorsHash() types.Hash {
-	m.lastStateMtx.RLock()
-	defer m.lastStateMtx.RUnlock()
-	return m.lastState.NextValidators.Hash()
-}
-
 func (m *Manager) getLastBlockTime() time.Time {
 	m.lastStateMtx.RLock()
 	defer m.lastStateMtx.RUnlock()
@@ -811,6 +768,7 @@ func (m *Manager) applyBlock(ctx context.Context, block *types.Block) (types.Sta
 	defer m.lastStateMtx.RUnlock()
 	return m.executor.ApplyBlock(ctx, m.lastState, block)
 }
+
 func updateState(s *types.State, res *abci.ResponseInitChain) {
 	// If the app did not return an app hash, we keep the one set from the genesis doc in
 	// the state. We don't set appHash since we don't want the genesis doc app hash
@@ -843,13 +801,4 @@ func updateState(s *types.State, res *abci.ResponseInitChain) {
 	// We update the last results hash with the empty hash, to conform with RFC-6962.
 	s.LastResultsHash = merkle.HashFromByteSlices(nil)
 
-	if len(res.Validators) > 0 {
-		vals, err := cmtypes.PB2TM.ValidatorUpdates(res.Validators)
-		if err != nil {
-			// TODO(tzdybal): handle error properly
-			panic(err)
-		}
-		s.Validators = cmtypes.NewValidatorSet(vals)
-		s.NextValidators = cmtypes.NewValidatorSet(vals).CopyIncrementProposerPriority(1)
-	}
 }

block/manager_test.go

@@ -21,17 +21,16 @@ import (
 )
 
 func TestInitialState(t *testing.T) {
+	genesisValidators, _ := types.GetGenesisValidatorSetWithSigner()
 	genesis := &cmtypes.GenesisDoc{
 		ChainID:       "genesis id",
 		InitialHeight: 100,
+		Validators:    genesisValidators,
 	}
 	sampleState := types.State{
 		ChainID:         "state id",
 		InitialHeight:   123,
 		LastBlockHeight: 128,
-		LastValidators:  types.GetRandomValidatorSet(),
-		Validators:      types.GetRandomValidatorSet(),
-		NextValidators:  types.GetRandomValidatorSet(),
 	}
 
 	ctx, cancel := context.WithCancel(context.Background())

da/mock/mock.go

@@ -148,7 +148,6 @@ func (m *DataAvailabilityLayerClient) SubmitBlocks(ctx context.Context, blocks [
 	for _, block := range blocks {
 		blockHeight := uint64(block.Height())
 		m.logger.Debug("Submitting blocks to DA layer!", "height", blockHeight, "dataLayerHeight", daHeight)
-
 		hash := block.Hash()
 		blob, err := block.MarshalBinary()
 		if err != nil {

go.mod

@@ -24,7 +24,7 @@ require (
 	github.com/multiformats/go-multiaddr v0.12.0
 	github.com/prometheus/client_golang v1.17.0
 	github.com/rollkit/celestia-openrpc v0.3.0
-	github.com/rollkit/go-da v0.0.0-20231024133951-57bc36006772
+	github.com/rollkit/go-da v0.0.0-20231117151938-ee3b613d7a3a
 	github.com/rs/cors v1.10.1
 	github.com/spf13/cobra v1.8.0
 	github.com/spf13/viper v1.17.0

go.sum

@@ -1377,8 +1377,8 @@ github.com/rogpeppe/go-internal v1.8.1/go.mod h1:JeRgkft04UBgHMgCIwADu4Pn6Mtm5d4
 github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M=
 github.com/rollkit/celestia-openrpc v0.3.0 h1:jMLsdLNQ7T20yiNDlisBhlyurFOpN1gZ6vC068FPrQA=
 github.com/rollkit/celestia-openrpc v0.3.0/go.mod h1:2ZhU01YF2hsHIROWzxfMZOYM09Kgyy4roH5JWoNJzp0=
-github.com/rollkit/go-da v0.0.0-20231024133951-57bc36006772 h1:0qbVvvxy++RIjwoI2GmqgZDNP5yShBMA+swWjKt7mQE=
-github.com/rollkit/go-da v0.0.0-20231024133951-57bc36006772/go.mod h1:cy1LA9kCyCJHgszKkTh9hJn816l5Oa87GMA2c1imfqA=
+github.com/rollkit/go-da v0.0.0-20231117151938-ee3b613d7a3a h1:d/2491oTlCydpZepyxG66D8s5tT9QG9n4YuemL0eCmQ=
+github.com/rollkit/go-da v0.0.0-20231117151938-ee3b613d7a3a/go.mod h1:cy1LA9kCyCJHgszKkTh9hJn816l5Oa87GMA2c1imfqA=
 github.com/rs/cors v1.7.0/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=
 github.com/rs/cors v1.8.2/go.mod h1:XyqrcTp5zjWr1wsJ8PIRZssZ8b/WMcMf71DJnit4EMU=
 github.com/rs/cors v1.10.1 h1:L0uuZVXIKlI1SShY2nhFfo44TYvDPQ1w4oFkUJNfhyo=

node/full_client.go

@@ -498,25 +498,28 @@ func (c *FullClient) Commit(ctx context.Context, height *int64) (*ctypes.ResultC
 // Validators returns paginated list of validators at given height.
 func (c *FullClient) Validators(ctx context.Context, heightPtr *int64, pagePtr, perPagePtr *int) (*ctypes.ResultValidators, error) {
 	height := c.normalizeHeight(heightPtr)
-	validators, err := c.node.Store.GetValidators(height)
-	if err != nil {
-		return nil, fmt.Errorf("failed to load validators for height %d: %w", height, err)
-	}
+	genesisValidators := c.node.GetGenesis().Validators
 
-	totalCount := len(validators.Validators)
-	perPage := validatePerPage(perPagePtr)
-	page, err := validatePage(pagePtr, perPage, totalCount)
-	if err != nil {
-		return nil, err
+	if len(genesisValidators) != 1 {
+		return nil, fmt.Errorf("there should be exactly one validator in genesis")
+	}
+	// Since it's a centralized sequencer
+	// changed behavior to get this from genesis
+	genesisValidator := genesisValidators[0]
+	validator := cmtypes.Validator{
+		Address:          genesisValidator.Address,
+		PubKey:           genesisValidator.PubKey,
+		VotingPower:      int64(1),
+		ProposerPriority: int64(1),
 	}
 
-	skipCount := validateSkipCount(page, perPage)
-	v := validators.Validators[skipCount : skipCount+cmmath.MinInt(perPage, totalCount-skipCount)]
 	return &ctypes.ResultValidators{
 		BlockHeight: int64(height),
-		Validators:  v,
-		Count:       len(v),
-		Total:       totalCount,
+		Validators: []*cmtypes.Validator{
+			&validator,
+		},
+		Count: 1,
+		Total: 1,
 	}, nil
 }
 
@@ -696,11 +699,20 @@ func (c *FullClient) Status(ctx context.Context) (*ctypes.ResultStatus, error) {
 		return nil, fmt.Errorf("failed to find earliest block: %w", err)
 	}
 
-	validators, err := c.node.Store.GetValidators(latest.Height())
-	if err != nil {
-		return nil, fmt.Errorf("failed to fetch the validator info at latest block: %w", err)
+	genesisValidators := c.node.GetGenesis().Validators
+
+	if len(genesisValidators) != 1 {
+		return nil, fmt.Errorf("there should be exactly one validator in genesis")
+	}
+
+	// Changed behavior to get this from genesis
+	genesisValidator := genesisValidators[0]
+	validator := cmtypes.Validator{
+		Address:          genesisValidator.Address,
+		PubKey:           genesisValidator.PubKey,
+		VotingPower:      int64(1),
+		ProposerPriority: int64(1),
 	}
-	_, validator := validators.GetByAddress(latest.SignedHeader.ProposerAddress)
 
 	state, err := c.node.Store.GetState()
 	if err != nil {