Anchor already stores and checks whether an account is initialized

Author: yhzhang0128

examples/sol-anchor-contract/programs/example-sol-anchor-contract/src/lib.rs

@@ -7,7 +7,6 @@ declare_id!("Fwn1fCmbjd8d95hxY9NUUr5Xa7D13khveMnmCUFdd3ah");
 
 #[account]
 pub struct AdminConfig {
-    pub is_initialized:           bool,
     pub loan_price_feed_id:       Pubkey,
     pub collateral_price_feed_id: Pubkey,
 }
@@ -39,18 +38,11 @@ pub mod example_sol_anchor_contract {
     use super::*;
 
     pub fn init(ctx: Context<InitRequest>, config: AdminConfig) -> Result<()> {
-        if ctx.accounts.config.is_initialized {
-            return Err(error!(ErrorCode::ReInitialize));
-        }
         ctx.accounts.config.set_inner(config);
         Ok(())
     }
 
     pub fn loan_to_value(ctx: Context<QueryRequest>, loan_qty: i64, collateral_qty: i64) -> Result<()> {
-        if !ctx.accounts.config.is_initialized {
-            return Err(error!(ErrorCode::UnInitialize));
-        }
-
         msg!("Loan quantity is {}.", loan_qty);
         msg!("Collateral quantity is {}.", collateral_qty);
 

examples/sol-anchor-contract/scripts/invoke.ts

@@ -32,7 +32,6 @@ try {
 it("Initialize the config.", async () => {
     let txSig = await program.rpc.init(
         {
-            isInitialized: true,
             loanPriceFeedId: new anchor.web3.PublicKey(ethToUSD),
             collateralPriceFeedId: new anchor.web3.PublicKey(usdtToUSD),
         },
@@ -73,7 +72,6 @@ it("Prevent initialization of config without authority.", async () => {
     try {
         txSig = await program.rpc.init(
             {
-                isInitialized: true,
                 loanPriceFeedId: new anchor.web3.PublicKey(ethToUSD),
                 collateralPriceFeedId: new anchor.web3.PublicKey(usdtToUSD),
             },