Parse address lookup table accounts

account-decoder/Cargo.toml

@@ -19,6 +19,7 @@ lazy_static = "1.4.0"
 serde = "1.0.138"
 serde_derive = "1.0.103"
 serde_json = "1.0.81"
+solana-address-lookup-table-program = { path = "../programs/address-lookup-table", version = "=1.11.6" }
 solana-config-program = { path = "../programs/config", version = "=1.11.6" }
 solana-sdk = { path = "../sdk", version = "=1.11.6" }
 solana-vote-program = { path = "../programs/vote", version = "=1.11.6" }

account-decoder/src/lib.rs

@@ -5,6 +5,7 @@ extern crate lazy_static;
 extern crate serde_derive;
 
 pub mod parse_account_data;
+pub mod parse_address_lookup_table;
 pub mod parse_bpf_loader;
 pub mod parse_config;
 pub mod parse_nonce;

account-decoder/src/parse_account_data.rs

@@ -1,5 +1,6 @@
 use {
     crate::{
+        parse_address_lookup_table::parse_address_lookup_table,
         parse_bpf_loader::parse_bpf_upgradeable_loader,
         parse_config::parse_config,
         parse_nonce::parse_nonce,
@@ -16,6 +17,7 @@ use {
 };
 
 lazy_static! {
+    static ref ADDRESS_LOOKUP_PROGRAM_ID: Pubkey = solana_address_lookup_table_program::id();
     static ref BPF_UPGRADEABLE_LOADER_PROGRAM_ID: Pubkey = solana_sdk::bpf_loader_upgradeable::id();
     static ref CONFIG_PROGRAM_ID: Pubkey = solana_config_program::id();
     static ref STAKE_PROGRAM_ID: Pubkey = stake::program::id();
@@ -24,6 +26,10 @@ lazy_static! {
     static ref VOTE_PROGRAM_ID: Pubkey = solana_vote_program::id();
     pub static ref PARSABLE_PROGRAM_IDS: HashMap<Pubkey, ParsableAccount> = {
         let mut m = HashMap::new();
+        m.insert(
+            *ADDRESS_LOOKUP_PROGRAM_ID,
+            ParsableAccount::AddressLookupTable,
+        );
         m.insert(
             *BPF_UPGRADEABLE_LOADER_PROGRAM_ID,
             ParsableAccount::BpfUpgradeableLoader,
@@ -68,6 +74,7 @@ pub struct ParsedAccount {
 #[derive(Debug, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub enum ParsableAccount {
+    AddressLookupTable,
     BpfUpgradeableLoader,
     Config,
     Nonce,
@@ -94,6 +101,9 @@ pub fn parse_account_data(
         .ok_or(ParseAccountError::ProgramNotParsable)?;
     let additional_data = additional_data.unwrap_or_default();
     let parsed_json = match program_name {
+        ParsableAccount::AddressLookupTable => {
+            serde_json::to_value(parse_address_lookup_table(data)?)?
+        }
         ParsableAccount::BpfUpgradeableLoader => {
             serde_json::to_value(parse_bpf_upgradeable_loader(data)?)?
         }

account-decoder/src/parse_address_lookup_table.rs

@@ -0,0 +1,117 @@
+use {
+    crate::parse_account_data::{ParsableAccount, ParseAccountError},
+    solana_address_lookup_table_program::state::AddressLookupTable,
+    solana_sdk::instruction::InstructionError,
+};
+
+pub fn parse_address_lookup_table(
+    data: &[u8],
+) -> Result<LookupTableAccountType, ParseAccountError> {
+    AddressLookupTable::deserialize(data)
+        .map(|address_lookup_table| {
+            LookupTableAccountType::LookupTable(address_lookup_table.into())
+        })
+        .or_else(|err| match err {
+            InstructionError::UninitializedAccount => Ok(LookupTableAccountType::Uninitialized),
+            _ => Err(ParseAccountError::AccountNotParsable(
+                ParsableAccount::AddressLookupTable,
+            )),
+        })
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq)]
+#[serde(rename_all = "camelCase", tag = "type", content = "info")]
+pub enum LookupTableAccountType {
+    Uninitialized,
+    LookupTable(UiLookupTable),
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+pub struct UiLookupTable {
+    pub deactivation_slot: String,
+    pub last_extended_slot: String,
+    pub last_extended_slot_start_index: u8,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub authority: Option<String>,
+    pub addresses: Vec<String>,
+}
+
+impl<'a> From<AddressLookupTable<'a>> for UiLookupTable {
+    fn from(address_lookup_table: AddressLookupTable) -> Self {
+        Self {
+            deactivation_slot: address_lookup_table.meta.deactivation_slot.to_string(),
+            last_extended_slot: address_lookup_table.meta.last_extended_slot.to_string(),
+            last_extended_slot_start_index: address_lookup_table
+                .meta
+                .last_extended_slot_start_index,
+            authority: address_lookup_table
+                .meta
+                .authority
+                .map(|authority| authority.to_string()),
+            addresses: address_lookup_table
+                .addresses
+                .iter()
+                .map(|address| address.to_string())
+                .collect(),
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use {
+        super::*,
+        solana_address_lookup_table_program::state::{LookupTableMeta, LOOKUP_TABLE_META_SIZE},
+        solana_sdk::pubkey::Pubkey,
+        std::borrow::Cow,
+    };
+
+    #[test]
+    fn test_parse_address_lookup_table() {
+        let authority = Pubkey::new_unique();
+        let deactivation_slot = 1;
+        let last_extended_slot = 2;
+        let last_extended_slot_start_index = 3;
+        let lookup_table_meta = LookupTableMeta {
+            deactivation_slot,
+            last_extended_slot,
+            last_extended_slot_start_index,
+            authority: Some(authority),
+            ..LookupTableMeta::default()
+        };
+        let num_addresses = 42;
+        let mut addresses = Vec::with_capacity(num_addresses);
+        addresses.resize_with(num_addresses, Pubkey::new_unique);
+        let lookup_table = AddressLookupTable {
+            meta: lookup_table_meta,
+            addresses: Cow::Owned(addresses),
+        };
+        let lookup_table_data =
+            AddressLookupTable::serialize_for_tests(lookup_table.clone()).unwrap();
+
+        let parsing_result = parse_address_lookup_table(&lookup_table_data).unwrap();
+        if let LookupTableAccountType::LookupTable(ui_lookup_table) = parsing_result {
+            assert_eq!(
+                ui_lookup_table.deactivation_slot,
+                deactivation_slot.to_string()
+            );
+            assert_eq!(
+                ui_lookup_table.last_extended_slot,
+                last_extended_slot.to_string()
+            );
+            assert_eq!(
+                ui_lookup_table.last_extended_slot_start_index,
+                last_extended_slot_start_index
+            );
+            assert_eq!(ui_lookup_table.authority, Some(authority.to_string()));
+            assert_eq!(ui_lookup_table.addresses.len(), num_addresses);
+        }
+
+        assert_eq!(
+            parse_address_lookup_table(&[0u8; LOOKUP_TABLE_META_SIZE]).unwrap(),
+            LookupTableAccountType::Uninitialized
+        );
+        assert!(parse_address_lookup_table(&[]).is_err());
+    }
+}