solana_account_decoder/
parse_address_lookup_table.rs

1use {
2    crate::parse_account_data::{ParsableAccount, ParseAccountError},
3    solana_sdk::{address_lookup_table::state::AddressLookupTable, instruction::InstructionError},
4};
5
6pub fn parse_address_lookup_table(
7    data: &[u8],
8) -> Result<LookupTableAccountType, ParseAccountError> {
9    AddressLookupTable::deserialize(data)
10        .map(|address_lookup_table| {
11            LookupTableAccountType::LookupTable(address_lookup_table.into())
12        })
13        .or_else(|err| match err {
14            InstructionError::UninitializedAccount => Ok(LookupTableAccountType::Uninitialized),
15            _ => Err(ParseAccountError::AccountNotParsable(
16                ParsableAccount::AddressLookupTable,
17            )),
18        })
19}
20
21#[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
22#[serde(rename_all = "camelCase", tag = "type", content = "info")]
23pub enum LookupTableAccountType {
24    Uninitialized,
25    LookupTable(UiLookupTable),
26}
27
28#[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
29#[serde(rename_all = "camelCase")]
30pub struct UiLookupTable {
31    pub deactivation_slot: String,
32    pub last_extended_slot: String,
33    pub last_extended_slot_start_index: u8,
34    #[serde(skip_serializing_if = "Option::is_none")]
35    pub authority: Option<String>,
36    pub addresses: Vec<String>,
37}
38
39impl<'a> From<AddressLookupTable<'a>> for UiLookupTable {
40    fn from(address_lookup_table: AddressLookupTable) -> Self {
41        Self {
42            deactivation_slot: address_lookup_table.meta.deactivation_slot.to_string(),
43            last_extended_slot: address_lookup_table.meta.last_extended_slot.to_string(),
44            last_extended_slot_start_index: address_lookup_table
45                .meta
46                .last_extended_slot_start_index,
47            authority: address_lookup_table
48                .meta
49                .authority
50                .map(|authority| authority.to_string()),
51            addresses: address_lookup_table
52                .addresses
53                .iter()
54                .map(|address| address.to_string())
55                .collect(),
56        }
57    }
58}
59
60#[cfg(test)]
61mod test {
62    use {
63        super::*,
64        solana_sdk::{
65            address_lookup_table::state::{LookupTableMeta, LOOKUP_TABLE_META_SIZE},
66            pubkey::Pubkey,
67        },
68        std::borrow::Cow,
69    };
70
71    #[test]
72    fn test_parse_address_lookup_table() {
73        let authority = Pubkey::new_unique();
74        let deactivation_slot = 1;
75        let last_extended_slot = 2;
76        let last_extended_slot_start_index = 3;
77        let lookup_table_meta = LookupTableMeta {
78            deactivation_slot,
79            last_extended_slot,
80            last_extended_slot_start_index,
81            authority: Some(authority),
82            ..LookupTableMeta::default()
83        };
84        let num_addresses = 42;
85        let mut addresses = Vec::with_capacity(num_addresses);
86        addresses.resize_with(num_addresses, Pubkey::new_unique);
87        let lookup_table = AddressLookupTable {
88            meta: lookup_table_meta,
89            addresses: Cow::Owned(addresses),
90        };
91        let lookup_table_data = AddressLookupTable::serialize_for_tests(lookup_table).unwrap();
92
93        let parsing_result = parse_address_lookup_table(&lookup_table_data).unwrap();
94        if let LookupTableAccountType::LookupTable(ui_lookup_table) = parsing_result {
95            assert_eq!(
96                ui_lookup_table.deactivation_slot,
97                deactivation_slot.to_string()
98            );
99            assert_eq!(
100                ui_lookup_table.last_extended_slot,
101                last_extended_slot.to_string()
102            );
103            assert_eq!(
104                ui_lookup_table.last_extended_slot_start_index,
105                last_extended_slot_start_index
106            );
107            assert_eq!(ui_lookup_table.authority, Some(authority.to_string()));
108            assert_eq!(ui_lookup_table.addresses.len(), num_addresses);
109        }
110
111        assert_eq!(
112            parse_address_lookup_table(&[0u8; LOOKUP_TABLE_META_SIZE]).unwrap(),
113            LookupTableAccountType::Uninitialized
114        );
115        assert!(parse_address_lookup_table(&[]).is_err());
116    }
117}
solana_account_decoder/parse_address_lookup_table.rs

solana_account_decoder/
parse_address_lookup_table.rs
