Squashed commit of the following:

commit f5dc02c
Author: Kirill <[email protected]>
Date:   Thu Oct 17 11:15:15 2024 +0400

    Small restructure of plugin logic (#2221)

commit b43c46f
Author: Rian Hughes <[email protected]>
Date:   Wed Oct 16 15:42:07 2024 +0300

    Support plugins (#2051)

    Co-authored-by: rian <[email protected]>
    Co-authored-by: LordGhostX <[email protected]>

commit ca006de
Author: Kirill <[email protected]>
Date:   Wed Oct 16 16:14:16 2024 +0400

    Replace UnmarshalJSON() with UnmarshalText() for transaction statuses (#2220)

    * Replace UnmarshalJSON() with UnmarshalText() for transaction statuses

    UnmarshalText avoids issues with forgetting quotes in JSON, making it simpler for parsing plain text values.

fix merge conflicts

README.md

@@ -228,6 +228,7 @@ After following these steps, Juno should be up and running on your machine, util
 - Starknet state construction and storage using a path-based Merkle Patricia trie.
 - Feeder gateway synchronisation of Blocks, Transactions, Receipts, State Updates and Classes.
 - Block and Transaction hash verification.
+- Plugins 
 
 ## 🛣 Roadmap
 

blockchain/blockchain.go

@@ -828,6 +828,23 @@ func (b *Blockchain) RevertHead() error {
 	return b.database.Update(b.revertHead)
 }
 
+func (b *Blockchain) GetReverseStateDiff() (*core.StateDiff, error) {
+	var reverseStateDiff *core.StateDiff
+	return reverseStateDiff, b.database.View(func(txn db.Transaction) error {
+		blockNumber, err := chainHeight(txn)
+		if err != nil {
+			return err
+		}
+		stateUpdate, err := stateUpdateByNumber(txn, blockNumber)
+		if err != nil {
+			return err
+		}
+		state := core.NewState(txn)
+		reverseStateDiff, err = state.GetReverseStateDiff(blockNumber, stateUpdate.StateDiff)
+		return err
+	})
+}
+
 func (b *Blockchain) revertHead(txn db.Transaction) error {
 	blockNumber, err := chainHeight(txn)
 	if err != nil {
@@ -874,7 +891,6 @@ func (b *Blockchain) revertHead(txn db.Transaction) error {
 	}
 
 	// Revert chain height and pending.
-
 	if genesisBlock {
 		if err = txn.Delete(db.Pending.Key()); err != nil {
 			return err

cmd/juno/juno.go

@@ -82,6 +82,7 @@ const (
 	callMaxStepsF           = "rpc-call-max-steps"
 	corsEnableF             = "rpc-cors-enable"
 	versionedConstantsFileF = "versioned-constants-file"
+	pluginPathF             = "plugin-path"
 
 	defaultConfig                   = ""
 	defaulHost                      = "localhost"
@@ -119,6 +120,7 @@ const (
 	defaultGwTimeout                = 5 * time.Second
 	defaultCorsEnable               = false
 	defaultVersionedConstantsFile   = ""
+	defaultPluginPath               = ""
 
 	configFlagUsage                       = "The YAML configuration file."
 	logLevelFlagUsage                     = "Options: trace, debug, info, warn, error."
@@ -170,6 +172,7 @@ const (
 		"The upper limit is 4 million steps, and any higher value will still be capped at 4 million."
 	corsEnableUsage             = "Enable CORS on RPC endpoints"
 	versionedConstantsFileUsage = "Use custom versioned constants from provided file"
+	pluginPathUsage             = "Path to the plugin .so file"
 )
 
 var Version string
@@ -355,6 +358,7 @@ func NewCmd(config *node.Config, run func(*cobra.Command, []string) error) *cobr
 	junoCmd.Flags().Bool(corsEnableF, defaultCorsEnable, corsEnableUsage)
 	junoCmd.Flags().String(versionedConstantsFileF, defaultVersionedConstantsFile, versionedConstantsFileUsage)
 	junoCmd.MarkFlagsMutuallyExclusive(p2pFeederNodeF, p2pPeersF)
+	junoCmd.Flags().String(pluginPathF, defaultPluginPath, pluginPathUsage)
 
 	junoCmd.AddCommand(GenP2PKeyPair(), DBCmd(defaultDBPath))