Move date oracle to config program (#7105)

automerge

programs/config/src/date_instruction.rs

@@ -0,0 +1,58 @@
+use crate::{config_instruction, ConfigState};
+///
+/// A library for creating a trusted date oracle.
+///
+use bincode::{deserialize, serialized_size};
+use chrono::{
+    prelude::{Date, DateTime, TimeZone, Utc},
+    serde::ts_seconds,
+};
+use serde_derive::{Deserialize, Serialize};
+use solana_sdk::{instruction::Instruction, pubkey::Pubkey};
+
+#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Clone)]
+pub struct DateConfig {
+    #[serde(with = "ts_seconds")]
+    pub date_time: DateTime<Utc>,
+}
+
+impl Default for DateConfig {
+    fn default() -> Self {
+        Self {
+            date_time: Utc.timestamp(0, 0),
+        }
+    }
+}
+impl DateConfig {
+    pub fn new(date: Date<Utc>) -> Self {
+        Self {
+            date_time: date.and_hms(0, 0, 0),
+        }
+    }
+
+    pub fn deserialize(input: &[u8]) -> Option<Self> {
+        deserialize(input).ok()
+    }
+}
+
+impl ConfigState for DateConfig {
+    fn max_space() -> u64 {
+        serialized_size(&Self::default()).unwrap()
+    }
+}
+
+/// Create a date account. The date is set to the Unix epoch.
+pub fn create_account(
+    payer_pubkey: &Pubkey,
+    date_pubkey: &Pubkey,
+    lamports: u64,
+) -> Vec<Instruction> {
+    config_instruction::create_account::<DateConfig>(payer_pubkey, date_pubkey, lamports, vec![])
+}
+
+/// Set the date in the date account. The account pubkey must be signed in the
+/// transaction containing this instruction.
+pub fn store(date_pubkey: &Pubkey, date: Date<Utc>) -> Instruction {
+    let date_config = DateConfig::new(date);
+    config_instruction::store(&date_pubkey, true, vec![], &date_config)
+}