Merge pull request #108 from lastemp/update-example-sol-anchor-contract

Update example sol-anchor-contract #107

Author: guibescos

examples/sol-anchor-contract/.gitignore

@@ -1,9 +1,7 @@
 yarn.lock
-Cargo.lock
 .anchor
 .DS_Store
 target
 **/*.rs.bk
 node_modules
 test-ledger
-program_address.json

examples/sol-anchor-contract/Anchor.toml

@@ -1,10 +1,25 @@
-[programs.devnet]
-example_sol_anchor_contract = "BZh3CP454Ca1C9yBp2tpGAkXoKFti9x8ShJLSxNDpoxa"
-
 [provider]
-cluster = "devnet"
+cluster = "localnet"
 wallet = "~/.config/solana/id.json"
 
+[programs.localnet]
+sol_anchor_contract = "GFPM2LncpbWiLkePLs3QjcLVPw31B2h23FwFfhig79fh"
+
 [scripts]
-install = "npm install"
-test = "yarn run ts-mocha -p ./tsconfig.json -t 1000000 scripts/test.ts"
+test = "yarn run ts-mocha -p ./tsconfig.json -t 1000000 tests/**/*.ts"
+
+[test]
+startup_wait = 20000
+
+[[test.genesis]]
+address = "GFPM2LncpbWiLkePLs3QjcLVPw31B2h23FwFfhig79fh"
+program = "./target/deploy/sol_anchor_contract.so"
+
+[test.validator]
+url = "https://api.devnet.solana.com"
+
+[[test.validator.clone]]
+address = "EdVCmQ9FSPcVe5YySXDPCRmc8aDQLKJ9xvYBMZPie1Vw"
+
+[[test.validator.clone]]
+address = "38xoQ4oeJCBrcVvca2cGk7iV1dAfrmTR1kmhSCJQ8Jto"

examples/sol-anchor-contract/package-lock.json

@@ -4,14 +4,16 @@
         "lint": "prettier */*.js \"*/**/*{.js,.ts}\" --check"
     },
     "dependencies": {
-        "@project-serum/anchor": "^0.25.0",
+        "@coral-xyz/anchor": "^0.27.0"
+    },
+    "devDependencies": {
+        "chai": "^4.3.7",
+        "mocha": "^9.2.2",
+        "ts-mocha": "^10.0.0",
         "@types/bn.js": "^5.1.1",
-        "@types/chai": "^4.3.3",
+        "@types/chai": "^4.3.5",
         "@types/mocha": "^9.1.1",
-        "chai": "^4.3.6",
-        "mocha": "^10.1.0",
-        "prettier": "^2.7.1",
-        "ts-mocha": "^10.0.0",
-        "typescript": "^4.8.4"
+        "typescript": "^4.9.5",
+        "prettier": "^2.8.8"
     }
 }

examples/sol-anchor-contract/package.json

@@ -1,12 +1,13 @@
 [package]
-name = "example-sol-anchor-contract"
+name = "sol-anchor-contract"
 version = "0.1.0"
 description = "Created with Anchor"
+rust-version = "1.60"
 edition = "2021"
 
 [lib]
 crate-type = ["cdylib", "lib"]
-name = "example_sol_anchor_contract"
+name = "sol_anchor_contract"
 
 [features]
 no-entrypoint = []
@@ -16,7 +17,6 @@ cpi = ["no-entrypoint"]
 default = []
 
 [dependencies]
-anchor-lang = "0.25.0"
+anchor-lang = "0.27.0"
 pyth-sdk = { path = "../../../../pyth-sdk", version = "0.7.0" }
-pyth-sdk-solana = { path = "../../../../pyth-sdk-solana", version = "0.7.0" }
-solana-program = ">= 1.10, < 1.15"
+pyth-sdk-solana = { path = "../../../../pyth-sdk-solana", version = "0.7.2" }

examples/sol-anchor-contract/programs/example-sol-anchor-contract/Cargo.toml examples/sol-anchor-contract/programs/sol-anchor-contract/Cargo.toml

@@ -1,50 +1,33 @@
-use std::mem::size_of;
 use anchor_lang::prelude::*;
-use solana_program::account_info::AccountInfo;
 
 pub mod state;
-use state::PriceFeed;
 use state::AdminConfig;
+use state::PriceFeed;
 
 mod error;
 use error::ErrorCode;
 
-declare_id!("BZh3CP454Ca1C9yBp2tpGAkXoKFti9x8ShJLSxNDpoxa");
-
-#[derive(Accounts)]
-pub struct InitRequest<'info> {
-    #[account(address = *program_id @ ErrorCode::Unauthorized)]
-    pub program: Signer<'info>,
-    #[account(mut)]
-    pub payer: Signer<'info>,
-    #[account(init, payer = payer, space = 8 + size_of::<AdminConfig>())]
-    pub config: Account<'info, AdminConfig>,
-    pub system_program: Program<'info, System>,
-}
+declare_id!("GFPM2LncpbWiLkePLs3QjcLVPw31B2h23FwFfhig79fh");
 
-#[derive(Accounts)]
-pub struct QueryRequest<'info> {
-    pub config: Account<'info, AdminConfig>,
-    #[account(address = config.loan_price_feed_id @ ErrorCode::InvalidArgument)]
-    pub pyth_loan_account: Account<'info, PriceFeed>,
-    #[account(address = config.collateral_price_feed_id @ ErrorCode::InvalidArgument)]
-    pub pyth_collateral_account: Account<'info, PriceFeed>,
-}
+const BASE : f64 = 10.0;
 
 #[program]
-pub mod example_sol_anchor_contract {
+pub mod sol_anchor_contract {
     use super::*;
 
     pub fn init(ctx: Context<InitRequest>, config: AdminConfig) -> Result<()> {
         ctx.accounts.config.set_inner(config);
         Ok(())
     }
 
-    pub fn loan_to_value(ctx: Context<QueryRequest>, loan_qty: i64, collateral_qty: i64) -> Result<()> {
+    pub fn loan_to_value(
+        ctx: Context<QueryRequest>,
+        loan_qty: i64,
+        collateral_qty: i64,
+    ) -> Result<()> {
         msg!("Loan quantity is {}.", loan_qty);
         msg!("Collateral quantity is {}.", collateral_qty);
 
-
         let loan_feed = &ctx.accounts.pyth_loan_account;
         let collateral_feed = &ctx.accounts.pyth_collateral_account;
         // With high confidence, the maximum value of the loan is
@@ -62,10 +45,21 @@ pub mod example_sol_anchor_contract {
         let mut loan_max_value = loan_max_price
             .checked_mul(loan_qty)
             .ok_or(ErrorCode::Overflow)?;
+
+        // WARNING : f64 SHOULD NOT BE USED IN SMART CONTRACTS, IT IS USED HERE ONLY FOR LOGGING PURPOSES
+        // lets get the maximum loan value based on computation
+        // i.e {} * 10^({})
+        // loan_max_value * 10^(loan_price.expo)
+        let exponent: i32 = loan_price.expo;
+        let result = BASE.powi(exponent.abs());
+        let result = if exponent < 0 { 1.0 / result } else { result };
+        let result_loan_value = loan_max_value as f64 * result;
+
         msg!(
-            "The maximum loan value is {} * 10^({}).",
+            "The maximum loan value is {} * 10^({}) = {}.",
             loan_max_value,
-            loan_price.expo
+            loan_price.expo,
+            result_loan_value
         );
 
         // With high confidence, the minimum value of the collateral is
@@ -83,10 +77,21 @@ pub mod example_sol_anchor_contract {
         let mut collateral_min_value = collateral_min_price
             .checked_mul(collateral_qty)
             .ok_or(ErrorCode::Overflow)?;
+
+        // WARNING : f64 SHOULD NOT BE USED IN SMART CONTRACTS, IT IS USED HERE ONLY FOR LOGGING PURPOSES
+        // lets get the minimum collateral value based on computation
+        // i.e {} * 10^({})
+        // i.e collateral_min_value * 10^(collateral_price.expo)
+        let exponent: i32 = collateral_price.expo;
+        let result = BASE.powi(exponent.abs());
+        let result: f64 = if exponent < 0 { 1.0 / result } else { result };
+        let result_collateral_value = collateral_min_value as f64 * result;
+
         msg!(
-            "The minimum collateral value is {} * 10^({}).",
+            "The minimum collateral value is {} * 10^({}) = {}.",
             collateral_min_value,
-            collateral_price.expo
+            collateral_price.expo,
+            result_collateral_value
         );
 
         // If the loan and collateral prices use different exponent,
@@ -116,3 +121,29 @@ pub mod example_sol_anchor_contract {
         }
     }
 }
+
+#[derive(Accounts)]
+pub struct InitRequest<'info> {
+    #[account(mut)]
+    pub payer: Signer<'info>,
+    #[account(
+        init,
+        payer = payer,
+        space = 8 + AdminConfig::INIT_SPACE
+    )]
+    pub config: Account<'info, AdminConfig>,
+    pub system_program: Program<'info, System>,
+}
+
+#[derive(Accounts)]
+pub struct QueryRequest<'info> {
+    pub config: Account<'info, AdminConfig>,
+    #[account(
+        address = config.loan_price_feed_id @ ErrorCode::InvalidArgument
+    )]
+    pub pyth_loan_account: Account<'info, PriceFeed>,
+    #[account(
+        address = config.collateral_price_feed_id @ ErrorCode::InvalidArgument
+    )]
+    pub pyth_collateral_account: Account<'info, PriceFeed>,
+}

examples/sol-anchor-contract/programs/example-sol-anchor-contract/Xargo.toml examples/sol-anchor-contract/programs/sol-anchor-contract/Xargo.toml

@@ -1,31 +1,31 @@
-use std::ops::Deref;
-use std::str::FromStr;
 use anchor_lang::prelude::*;
 use pyth_sdk_solana::state::load_price_account;
+use std::ops::Deref;
+use std::str::FromStr;
 
 use crate::ErrorCode;
 
 #[account]
+#[derive(InitSpace)]
 pub struct AdminConfig {
-    pub loan_price_feed_id:       Pubkey,
+    pub loan_price_feed_id: Pubkey,
     pub collateral_price_feed_id: Pubkey,
 }
 
 #[derive(Clone)]
-pub struct PriceFeed (pyth_sdk::PriceFeed);
+pub struct PriceFeed(pyth_sdk::PriceFeed);
 
 impl anchor_lang::Owner for PriceFeed {
     fn owner() -> Pubkey {
         // Make sure the owner is the pyth oracle account on solana devnet
         let oracle_addr = "gSbePebfvPy7tRqimPoVecS2UsBvYv46ynrzWocc92s";
-        return  Pubkey::from_str(&oracle_addr).unwrap();
+        return Pubkey::from_str(&oracle_addr).unwrap();
     }
 }
 
 impl anchor_lang::AccountDeserialize for PriceFeed {
-    fn try_deserialize_unchecked(data: &mut &[u8]) -> Result<Self>{
-        let account = load_price_account(data)
-            .map_err(|_x| error!(ErrorCode::PythError))?;
+    fn try_deserialize_unchecked(data: &mut &[u8]) -> Result<Self> {
+        let account = load_price_account(data).map_err(|_x| error!(ErrorCode::PythError))?;
 
         // Use a dummy key since the key field will be removed from the SDK
         let zeros: [u8; 32] = [0; 32];
@@ -36,7 +36,7 @@ impl anchor_lang::AccountDeserialize for PriceFeed {
 }
 
 impl anchor_lang::AccountSerialize for PriceFeed {
-    fn try_serialize<W: std::io::Write>(&self, _writer: &mut W,) -> std::result::Result<(), Error> {
+    fn try_serialize<W: std::io::Write>(&self, _writer: &mut W) -> std::result::Result<(), Error> {
         Err(error!(ErrorCode::TryToSerializePriceAccount))
     }
 }