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use chrono::prelude::*;
use resources::Amount;
/// A ledger represents the state of the Stellar universe at a given point in time. It contains the list of all the accounts and balances, all the orders in the distributed exchange, and any other data that persists.
/// The first ledger in the history of the network is called the genesis ledger.
#[derive(Debug, Deserialize, Clone)]
pub struct Ledger {
id: String,
paging_token: String,
hash: String,
sequence: u32,
transaction_count: i64,
operation_count: i64,
closed_at: DateTime<Utc>,
total_coins: Amount,
fee_pool: Amount,
base_fee_in_stroops: i64,
base_reserve_in_stroops: i64,
max_tx_set_size: u32,
protocol_version: u32,
}
impl Ledger {
/// The unique identifier for this ledger
pub fn id(&self) -> &String {
&self.id
}
/// A paging token suitable for use as the cursor parameter to ledger collection
/// resources.
pub fn paging_token(&self) -> &String {
&self.paging_token
}
/// A hex-encoded SHA-256 hash of the ledger’s XDR-encoded form.
pub fn hash(&self) -> &String {
&self.hash
}
/// Sequence number of this ledger, suitable for use as the as the :id parameter for url templates that require a ledger number.
pub fn sequence(&self) -> u32 {
self.sequence
}
/// The number of transactions in this ledger.
pub fn transaction_count(&self) -> i64 {
self.transaction_count
}
/// The number of operations in this ledger.
pub fn operation_count(&self) -> i64 {
self.operation_count
}
/// An ISO 8601 formatted string of when this ledger was closed.
pub fn closed_at(&self) -> DateTime<Utc> {
self.closed_at
}
/// The total number of lumens in circulation.
pub fn total_coins(&self) -> Amount {
self.total_coins
}
/// The sum of all transaction fees (in lumens) since the last inflation operation. They are redistributed during inflation.
pub fn fee_pool(&self) -> Amount {
self.fee_pool
}
/// The fee the network charges per operation in a transaction.
pub fn base_fee_in_stroops(&self) -> i64 {
self.base_fee_in_stroops
}
/// The fee the network charges per operation in a transaction as an amount asset.
pub fn base_fee_as_amount(&self) -> Amount {
Amount::new(self.base_fee_in_stroops)
}
/// The reserve the network uses when calculating an account’s minimum balance.
pub fn base_reserve_in_stroops(&self) -> i64 {
self.base_reserve_in_stroops
}
/// The reserve the network uses when calculating an account’s minimum balance as an amount asset.
pub fn base_reserve_as_amount(&self) -> Amount {
Amount::new(self.base_reserve_in_stroops)
}
/// The maximum number of transactions validators have agreed to process in a given ledger.
pub fn max_tx_set_size(&self) -> u32 {
self.max_tx_set_size
}
/// The protocol version that the stellar network was running when this ledger was committed.
pub fn protocol_version(&self) -> u32 {
self.protocol_version
}
}
#[cfg(test)]
mod ledger_tests {
use super::*;
use serde_json;
fn ledger_json() -> &'static str {
include_str!("../../fixtures/ledger.json")
}
#[test]
fn it_parses_into_a_transaction() {
let ledger: Ledger = serde_json::from_str(&ledger_json()).unwrap();
assert_eq!(
ledger.id(),
"eee9e6e02899365ecae4c37e52db7d99e2d130baf4ec1856d311bb546df1d0ad"
);
assert_eq!(ledger.paging_token(), "300042120331264");
assert_eq!(
ledger.hash(),
"eee9e6e02899365ecae4c37e52db7d99e2d130baf4ec1856d311bb546df1d0ad"
);
assert_eq!(ledger.sequence(), 69859);
assert_eq!(ledger.transaction_count(), 0);
assert_eq!(ledger.operation_count(), 0);
assert_eq!(ledger.closed_at(), Utc.ymd(2017, 3, 23).and_hms(20, 13, 23));
assert_eq!(ledger.total_coins(), Amount::new(1_000_000_000_000_000_000));
assert_eq!(ledger.fee_pool(), Amount::new(18_000_080_200));
assert_eq!(ledger.base_fee_in_stroops(), 100);
assert_eq!(ledger.base_reserve_in_stroops(), 100000000);
assert_eq!(ledger.max_tx_set_size(), 50);
assert_eq!(ledger.protocol_version(), 4);
}
}