Point the finance examples' oracle path at Pyth and rename the mock feed

CHANGELOG.md

@@ -4,6 +4,16 @@ All notable changes to this repository are documented here.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## [2026-09-23] - Finance examples point their production oracle path at Pyth
+
+The oracle network that the lending, perpetual futures and prop AMM examples
+modeled their price feeds on has shut down. The perpetual futures and prop AMM
+mock oracle program is now `mock-price-feed` in both Anchor variants, with the
+same program ID, instructions and account layout. Every production-path comment
+and README in the three examples, across Anchor v2, Anchor v1 and Quasar, now
+points at a Pyth `PriceUpdateV2` account, which `basics/pyth` reads. No program
+behavior changes.
+
 ## [2026-09-23] - The token fundraiser and order book Anchor v1 copies catch up
 
 Under the old rule that `anchor-v1/` copies were frozen, two v1 copies were

Cargo.toml

@@ -72,7 +72,7 @@ members = [
 
     # finance
     #
-    # The two `mock-switchboard` crates are excluded below: they share a package
+    # The two `mock-price-feed` crates are excluded below: they share a package
     # name, and one workspace cannot hold two packages called the same thing.
     # They stay path dependencies of the programs that test against them.
     "finance/betting-market/anchor/programs/betting-market",
@@ -127,11 +127,11 @@ members = [
     "tokens/token-extensions/transfer-hook/whitelist/anchor/programs/transfer-hook",
 ]
 # A path dependency inside the workspace directory joins the workspace unless it
-# is excluded. Both of these are named `mock_switchboard`, so leaving them in
-# fails with "two packages named `mock_switchboard` in this workspace".
+# is excluded. Both of these are named `mock_price_feed`, so leaving them in
+# fails with "two packages named `mock_price_feed` in this workspace".
 exclude = [
-    "finance/perpetual-futures/anchor/programs/mock-switchboard",
-    "finance/prop-amm/anchor/programs/mock-switchboard",
+    "finance/perpetual-futures/anchor/programs/mock-price-feed",
+    "finance/prop-amm/anchor/programs/mock-price-feed",
 ]
 resolver = "2"
 

finance/lending/anchor-v1/CHANGELOG.md

@@ -27,6 +27,12 @@ previous program, and by `first_deposit_must_exceed_the_minimum` and
 opens each reserve with a deposit from the market owner; `add_empty_reserve`
 leaves it empty.
 
+The price feed's production path now points at a Pyth `PriceUpdateV2` account
+(`price_mantissa = price_message.price`, `exponent = price_message.exponent`,
+`last_updated_slot = posted_slot`), since the oracle network the feed was
+modeled on has shut down. Documentation only: the account layout and handlers
+are unchanged.
+
 ## 2026-09-22
 
 Accrue interest by the wall clock instead of by slots. The reserve's
@@ -76,7 +82,7 @@ Initial lending program: a Kamino/Solend-style borrow/lend market.
   borrow-rate index; per-obligation scaled debt.
 - Oracle-priced obligation health with loan-to-value and liquidation-threshold
   limits, and close-factor-capped liquidation with a seize bonus.
-- Switchboard-On-Demand-shaped price feed with a `set_price` test writer.
+- Mantissa-and-exponent price feed with a `set_price` test writer.
 - Rust + LiteSVM integration tests covering supply/redeem, borrow/repay,
   withdraw, interest accrual, liquidation, the share-inflation guard, and
   rounding/stale-input edge cases.

finance/lending/anchor-v1/README.md

@@ -143,7 +143,7 @@ round-trips.
 
 ### Oracle
 
-`PriceFeed` mirrors a Switchboard On-Demand pull feed: a signed mantissa, an
+`PriceFeed` mirrors an oracle price feed such as Pyth's: a signed mantissa, an
 exponent (`price = mantissa * 10^exponent`), and the slot the price was written.
 Freshness is checked in **slots** (`MAX_PRICE_STALENESS_SLOTS`), not wall-clock
 time, plus one check slots alone cannot make: a cluster restart passes hours of
@@ -156,11 +156,12 @@ trusts exactly its own market's feed for the mint, and isolated markets can
 price the same asset independently.
 
 The `set_price` handler writes the feed directly so the LiteSVM tests are
-deterministic; in production a reserve points at the real Switchboard feed and the
-program decodes `PullFeedAccountData` (`price_mantissa = current_result.value`,
-`exponent = -18`, `last_updated_slot = current_result.slot`) instead, and should
-also reject results whose confidence interval is too wide. Switchboard is used
-rather than Pyth here for its lower compute cost.
+deterministic; in production a reserve points at a Pyth price feed and the
+program reads its `PriceUpdateV2` account instead, as
+[`basics/pyth`](../../../basics/pyth/) does, after checking the update's
+`feed_id`: `price_mantissa` is `price_message.price`, `exponent` is
+`price_message.exponent`, and `last_updated_slot` is `posted_slot`. It should
+also reject results whose confidence interval is too wide.
 
 ### Custody
 

finance/lending/anchor-v1/programs/lending/src/instructions/admin/set_price.rs

@@ -4,9 +4,9 @@ use anchor_spl::token_interface::Mint;
 use crate::constants::PRICE_FEED_SEED;
 use crate::state::{LendingMarket, PriceFeed};
 
-/// Test stand-in for a Switchboard On-Demand feed: writes a price directly so
+/// Test stand-in for an oracle price feed: writes a price directly so
 /// LiteSVM tests are deterministic. In production the reserve points at a real
-/// Switchboard feed instead and this handler is unused.
+/// Pyth price feed instead and this handler is unused.
 ///
 /// The feed PDA is seeded by `[b"price_feed", market, mint]` and writing it
 /// requires the market's `owner` to sign, so a market's prices can only be set

finance/lending/anchor-v1/programs/lending/src/state/price_feed.rs

@@ -10,12 +10,13 @@ use crate::math::price_mantissa_to_scaled;
 /// individual), so each market prices its own assets and one market can never
 /// write another's feed. Only the market's `owner` may write it (`set_price`).
 ///
-/// The layout mirrors a Switchboard On-Demand pull feed: a signed mantissa plus
-/// an exponent (`price = price_mantissa * 10^exponent`) and the slot the value
-/// was written. In production this account would be the real Switchboard feed
-/// and the program would decode it with the `switchboard-on-demand` crate
-/// (`PullFeedAccountData`): `price_mantissa = current_result.value`,
-/// `exponent = -18`, `last_updated_slot = current_result.slot`. Here the
+/// The layout mirrors an oracle price feed such as Pyth's: a signed mantissa
+/// plus an exponent (`price = price_mantissa * 10^exponent`) and the slot the
+/// value was written. In production this account would be a Pyth
+/// `PriceUpdateV2` owned by the Pyth Receiver program (`basics/pyth` reads
+/// one), mapped as `price_mantissa = price_message.price`,
+/// `exponent = price_message.exponent` and `last_updated_slot = posted_slot`,
+/// after checking the update's `feed_id`. Here the
 /// `set_price` handler writes it directly so LiteSVM tests are deterministic.
 /// A production read should also reject results whose confidence interval is
 /// too wide; this stand-in has no confidence field to check.

finance/lending/anchor-v1/programs/lending/tests/common/mod.rs

@@ -31,7 +31,7 @@ use lending::state::{Obligation, Reserve, ReserveConfig};
 pub use anchor_lang::prelude::Pubkey;
 
 /// A FIXED_POINT_SCALE-scaled price exponent: prices are passed as
-/// `mantissa * 10^-18`, matching a Switchboard On-Demand feed's 1e18 result.
+/// `mantissa * 10^-18`, the same 18 decimals as `FIXED_POINT_SCALE`.
 pub const PRICE_EXPONENT: i32 = -18;
 
 pub fn dollars(whole: u64) -> i128 {

finance/lending/anchor/CHANGELOG.md

@@ -27,6 +27,12 @@ previous program, and by `first_deposit_must_exceed_the_minimum` and
 opens each reserve with a deposit from the market owner; `add_empty_reserve`
 leaves it empty.
 
+The price feed's production path now points at a Pyth `PriceUpdateV2` account
+(`price_mantissa = price_message.price`, `exponent = price_message.exponent`,
+`last_updated_slot = posted_slot`), since the oracle network the feed was
+modeled on has shut down. Documentation only: the account layout and handlers
+are unchanged.
+
 ## 2026-09-22
 
 Accrue interest by the wall clock instead of by slots. The reserve's
@@ -76,7 +82,7 @@ Initial lending program: a Kamino/Solend-style borrow/lend market.
   borrow-rate index; per-obligation scaled debt.
 - Oracle-priced obligation health with loan-to-value and liquidation-threshold
   limits, and close-factor-capped liquidation with a seize bonus.
-- Switchboard-On-Demand-shaped price feed with a `set_price` test writer.
+- Mantissa-and-exponent price feed with a `set_price` test writer.
 - Rust + LiteSVM integration tests covering supply/redeem, borrow/repay,
   withdraw, interest accrual, liquidation, the share-inflation guard, and
   rounding/stale-input edge cases.

finance/lending/anchor/README.md

@@ -143,7 +143,7 @@ round-trips.
 
 ### Oracle
 
-`PriceFeed` mirrors a Switchboard On-Demand pull feed: a signed mantissa, an
+`PriceFeed` mirrors an oracle price feed such as Pyth's: a signed mantissa, an
 exponent (`price = mantissa * 10^exponent`), and the slot the price was written.
 Freshness is checked in **slots** (`MAX_PRICE_STALENESS_SLOTS`), not wall-clock
 time, plus one check slots alone cannot make: a cluster restart passes hours of
@@ -156,11 +156,12 @@ trusts exactly its own market's feed for the mint, and isolated markets can
 price the same asset independently.
 
 The `set_price` handler writes the feed directly so the LiteSVM tests are
-deterministic; in production a reserve points at the real Switchboard feed and the
-program decodes `PullFeedAccountData` (`price_mantissa = current_result.value`,
-`exponent = -18`, `last_updated_slot = current_result.slot`) instead, and should
-also reject results whose confidence interval is too wide. Switchboard is used
-rather than Pyth here for its lower compute cost.
+deterministic; in production a reserve points at a Pyth price feed and the
+program reads its `PriceUpdateV2` account instead, as
+[`basics/pyth`](../../../basics/pyth/) does, after checking the update's
+`feed_id`: `price_mantissa` is `price_message.price`, `exponent` is
+`price_message.exponent`, and `last_updated_slot` is `posted_slot`. It should
+also reject results whose confidence interval is too wide.
 
 ### Custody
 

finance/lending/anchor/programs/lending/src/instructions/admin/set_price.rs

@@ -4,9 +4,9 @@ use anchor_spl::token_interface::Mint;
 use crate::constants::PRICE_FEED_SEED;
 use crate::state::{LendingMarket, PriceFeed};
 
-/// Test stand-in for a Switchboard On-Demand feed: writes a price directly so
+/// Test stand-in for an oracle price feed: writes a price directly so
 /// LiteSVM tests are deterministic. In production the reserve points at a real
-/// Switchboard feed instead and this handler is unused.
+/// Pyth price feed instead and this handler is unused.
 ///
 /// The feed PDA is seeded by `[b"price_feed", market, mint]` and writing it
 /// requires the market's `owner` to sign, so a market's prices can only be set

finance/lending/anchor/programs/lending/src/state/price_feed.rs

@@ -9,12 +9,13 @@ use crate::math::price_mantissa_to_scaled;
 /// individual), so each market prices its own assets and one market can never
 /// write another's feed. Only the market's `owner` may write it (`set_price`).
 ///
-/// The layout mirrors a Switchboard On-Demand pull feed: a signed mantissa plus
-/// an exponent (`price = price_mantissa * 10^exponent`) and the slot the value
-/// was written. In production this account would be the real Switchboard feed
-/// and the program would decode it with the `switchboard-on-demand` crate
-/// (`PullFeedAccountData`): `price_mantissa = current_result.value`,
-/// `exponent = -18`, `last_updated_slot = current_result.slot`. Here the
+/// The layout mirrors an oracle price feed such as Pyth's: a signed mantissa
+/// plus an exponent (`price = price_mantissa * 10^exponent`) and the slot the
+/// value was written. In production this account would be a Pyth
+/// `PriceUpdateV2` owned by the Pyth Receiver program (`basics/pyth` reads
+/// one), mapped as `price_mantissa = price_message.price`,
+/// `exponent = price_message.exponent` and `last_updated_slot = posted_slot`,
+/// after checking the update's `feed_id`. Here the
 /// `set_price` handler writes it directly so LiteSVM tests are deterministic.
 /// A production read should also reject results whose confidence interval is
 /// too wide; this stand-in has no confidence field to check.

finance/lending/anchor/programs/lending/tests/common/mod.rs

@@ -26,7 +26,7 @@ use lending::state::{Obligation, Reserve, ReserveConfig};
 pub use anchor_lang::prelude::Address;
 
 /// A FIXED_POINT_SCALE-scaled price exponent: prices are passed as
-/// `mantissa * 10^-18`, matching a Switchboard On-Demand feed's 1e18 result.
+/// `mantissa * 10^-18`, the same 18 decimals as `FIXED_POINT_SCALE`.
 pub const PRICE_EXPONENT: i32 = -18;
 
 pub fn dollars(whole: u64) -> i128 {

finance/lending/quasar/CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## [2026-09-23]
 
+### Changed
+
+- Documentation only: the price feed's production path now points at a Pyth
+  price feed, since the oracle network it was modeled on has shut down.
+
 ### Fixed
 
 - Lock a minimum number of reserve shares. The first deposit now mints
@@ -113,7 +118,7 @@ Initial Quasar port of the Kamino/Solend-style borrow/lend program.
   borrow-rate index, accrued inline per instruction.
 - Oracle-priced health with loan-to-value and liquidation-threshold limits, and
   close-factor-capped liquidation with a seize bonus.
-- Switchboard-On-Demand-shaped price feed with a `set_price` test writer.
+- Mantissa-and-exponent price feed with a `set_price` test writer.
 - quasar-svm integration tests covering supply/redeem, borrow/repay, interest
   accrual, and liquidation (including the healthy-rejection path).
 - Price feed PDAs are seeded by their authority, so no signer can write or

finance/lending/quasar/README.md

@@ -47,12 +47,12 @@ Everything else mirrors the Anchor version.
 - **`Obligation`**: a borrower's isolated position: the collateral reserve and
   deposited share amount, plus the borrow reserve and scaled debt. PDA:
   `["obligation", market, owner]`.
-- **`PriceFeed`**: a Switchboard-On-Demand-shaped price (`mantissa * 10^exponent`
+- **`PriceFeed`**: an oracle-shaped price (`mantissa * 10^exponent`
   + slot). PDA: `["price_feed", market, mint]`: scoped to a market, not to any
   individual; only the market's `owner` may write it, so prices can't be squatted
   and each market prices its own assets. `set_price` writes it directly for
-  deterministic tests; in production a reserve points at the real Switchboard
-  feed. Freshness is checked in slots.
+  deterministic tests; in production a reserve points at a real Pyth
+  price feed. Freshness is checked in slots.
 - **Liquidation**: the close factor (max fraction of the debt one call repays)
   comes from the borrow reserve; the bonus from the collateral reserve. A
   repayment whose seizure would exceed the posted collateral fails with

finance/lending/quasar/src/instructions/admin.rs

@@ -181,7 +181,7 @@ impl InitializeReserve {
 }
 
 // ---------------------------------------------------------------------------
-// set_price (Switchboard stand-in for tests)
+// set_price (oracle stand-in for tests)
 // ---------------------------------------------------------------------------
 
 #[derive(Accounts)]

finance/lending/quasar/src/state.rs

@@ -72,11 +72,12 @@ pub struct Obligation {
     pub bump: u8,
 }
 
-/// Switchboard-On-Demand-shaped price feed. PDA: `["price_feed", market, mint]`
-/// — scoped to a market (not to any individual); only the market's `owner` may
-/// write it, so prices can't be squatted and each market prices its own assets.
+/// Oracle-shaped price feed, a mantissa and exponent like Pyth's.
+/// PDA: `["price_feed", market, mint]` — scoped to a market (not to any
+/// individual); only the market's `owner` may write it, so prices can't be
+/// squatted and each market prices its own assets.
 /// `price = price_mantissa * 10^exponent`; freshness is checked in slots. In
-/// production this account would be the real Switchboard feed.
+/// production this account would be a real Pyth price feed.
 #[account(discriminator = 4, set_inner)]
 #[seeds(b"price_feed", market: Address, mint: Address)]
 pub struct PriceFeed {

finance/lending/quasar/src/tests.rs

@@ -18,7 +18,7 @@ use {
     quasar_test::prelude::*,
 };
 
-// Prices are passed as `mantissa * 10^-18` (Switchboard-shaped).
+// Prices are passed as `mantissa * 10^-18`, the program's fixed-point scale.
 const EXP: i32 = -18;
 fn dollars(whole: u64) -> i128 {
     (whole as i128) * 1_000_000_000_000_000_000

finance/perpetual-futures/anchor-v1/Anchor.toml

@@ -9,7 +9,7 @@ skip-lint = false
 
 [programs.localnet]
 perpetual_futures = "3uCm8Jep469pHUpYQCh6eA6dpYV3ogvTvaRDZBPtw5So"
-mock_switchboard = "FnisQqhF56BxVYh5Wt8xW8wuTVN6STAGnk13MM5SRM7b"
+mock_price_feed = "FnisQqhF56BxVYh5Wt8xW8wuTVN6STAGnk13MM5SRM7b"
 
 [provider]
 cluster = "localnet"

finance/perpetual-futures/anchor-v1/CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## 2026-09-23
+
+The mock oracle program is now `mock-price-feed` (library and program
+`mock_price_feed`), with the same program ID, instructions and
+account layout. The oracle network it was modeled on has shut down, so the
+production path described in `state/oracle.rs` now reads a Pyth
+`PriceUpdateV2` account, as `basics/pyth` does. No behavior changes.
+
 ## 2026-09-22
 
 Accrue funding by the wall clock instead of by slots. The rate was quoted per

finance/perpetual-futures/anchor-v1/README.md

@@ -19,7 +19,7 @@ A [perpetual future](https://www.investopedia.com/terms/f/futurescontract.asp) (
 ## Programs
 
 - `perpetual-futures`: The exchange: pool creation, liquidity provision, opening/closing leveraged positions, funding, liquidation, and fee collection.
-- `mock-switchboard`: Test-only price feed. Stores a price, scale, last-update slot, and confidence band that tests write directly. Replaced by a real [Switchboard](https://docs.switchboard.xyz/) On-Demand feed in production.
+- `mock-price-feed`: Test-only price feed. Stores a price, scale, last-update slot, and confidence band that tests write directly. Replaced in production by a Pyth `PriceUpdateV2` account, as read in [`basics/pyth`](../../../basics/pyth/).
 
 All money math is integer `u128` with `checked_*` operations, multiplying before dividing and rounding in the pool's favour: no floats, no fixed-point library.
 

finance/perpetual-futures/anchor-v1/TERMINOLOGY.md

@@ -31,6 +31,7 @@ Terms used in this example, in the sense they carry here.
 - **Liquidity-provider share** — a token representing a pro-rata claim on
   assets-under-management.
 - **Oracle feed** — the account the pool reads its price from. This example uses
-  a mock Switchboard On-Demand feed; production points at a real one.
+  a mock oracle price feed; production points at a real one, such as
+  a Pyth price feed.
 - **Mark price** — the price positions are valued at. Here it is the oracle
   price directly, with no separate mark/index distinction.

finance/prop-amm/anchor-v1/programs/mock-switchboard/Cargo.toml → finance/perpetual-futures/anchor-v1/programs/mock-price-feed/Cargo.toml

@@ -1,12 +1,12 @@
 [package]
-name = "mock_switchboard"
+name = "mock_price_feed"
 version = "0.1.0"
-description = "Mock Switchboard On-Demand feed for testing the prop-amm program"
+description = "Mock oracle price feed for testing the perpetual-futures program"
 edition = "2021"
 
 [lib]
 crate-type = ["cdylib", "lib"]
-name = "mock_switchboard"
+name = "mock_price_feed"
 
 [features]
 default = []