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solang basics
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‎basics/account-data/solang/.gitignore‎

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.anchor
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.DS_Store
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target
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**/*.rs.bk
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node_modules
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test-ledger
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.yarn

‎basics/account-data/solang/Anchor.toml‎

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[features]
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seeds = false
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skip-lint = false
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[programs.localnet]
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account_data = "F1ipperKF9EfD821ZbbYjS319LXYiBmjhzkkf5a26rC"
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[registry]
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url = "https://api.apr.dev"
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[provider]
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cluster = "Localnet"
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wallet = "~/.config/solana/id.json"
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[scripts]
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test = "yarn run ts-mocha -p ./tsconfig.json -t 1000000 tests/**/*.ts"

‎basics/account-data/solang/package.json‎

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{
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"scripts": {
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"lint:fix": "prettier */*.js \"*/**/*{.js,.ts}\" -w",
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"lint": "prettier */*.js \"*/**/*{.js,.ts}\" --check"
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},
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"dependencies": {
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"@coral-xyz/anchor": "^0.28.0"
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},
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"devDependencies": {
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"chai": "^4.3.4",
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"mocha": "^9.0.3",
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"ts-mocha": "^10.0.0",
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"@types/bn.js": "^5.1.0",
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"@types/chai": "^4.3.0",
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"@types/mocha": "^9.0.0",
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"typescript": "^4.3.5",
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"prettier": "^2.6.2"
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}
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}

‎basics/account-data/solang/solidity/account-data.sol‎

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@program_id("F1ipperKF9EfD821ZbbYjS319LXYiBmjhzkkf5a26rC")
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contract account_data {
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// A private instance of the AddressInfo struct
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// This is the data that is stored in the account
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AddressInfo private addressInfo;
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// The AddressInfo struct definition
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struct AddressInfo {
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string name;
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uint8 houseNumber;
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string street;
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string city;
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}
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@payer(payer) // "payer" is the account that pays to create the dataAccount
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@space(space) // "space" allocated to the account (maximum 10240 bytes, maximum space that can be reallocate when creating account in program via a CPI)
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constructor(address payer, uint16 space, string _name, uint8 _houseNumber, string _street, string _city) {
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// The AddressInfo instance is initialized with the data passed to the constructor
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addressInfo = AddressInfo(_name, _houseNumber, _street, _city);
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}
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// A function to get the addressInfo data stored on the account
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function get() public view returns (AddressInfo) {
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return addressInfo;
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}
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// A function to get the size in bytes of the stored AddressInfo
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function getAddressInfoSize() public view returns(uint) {
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uint size = 0;
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size += bytes(addressInfo.name).length;
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size += 1; // For houseNumber, which is uint8 and takes 1 byte
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size += bytes(addressInfo.street).length;
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size += bytes(addressInfo.city).length;
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return size;
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}
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}

‎basics/account-data/solang/tests/account-data.ts‎

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import * as anchor from "@coral-xyz/anchor"
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import { Program } from "@coral-xyz/anchor"
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import { AccountData } from "../target/types/account_data"
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describe("account-data", () => {
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// Configure the client to use the local cluster.
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const provider = anchor.AnchorProvider.env()
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anchor.setProvider(provider)
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// Generate a new random keypair for the data account.
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const dataAccount = anchor.web3.Keypair.generate()
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const wallet = provider.wallet
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const program = anchor.workspace.AccountData as Program<AccountData>
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// Create the new account
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// Using 10240 bytes of space, because its unclear how to correctly calculate the minimum space needed for the account
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// Space calculation is different from regular Native/Anchor Solana programs
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it("Is initialized!", async () => {
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const tx = await program.methods
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.new(
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wallet.publicKey, // payer
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10240, // space (10240 bytes is the maximum space allowed when allocating space through a program)
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"Joe C", // name
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136, // house number
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"Mile High Dr.", // street
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"Solana Beach" // city
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)
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.accounts({ dataAccount: dataAccount.publicKey })
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.signers([dataAccount])
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.rpc()
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console.log("Your transaction signature", tx)
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})
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// Get the account data
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it("Get AddressInfo Data", async () => {
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const val = await program.methods
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.get()
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.accounts({ dataAccount: dataAccount.publicKey })
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.view()
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console.log("State:", val)
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})
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// Get the account data size
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// Testing how much space is used to store the account data
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// However, minimum space required is greater than this
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it("Get AddressInfo Size", async () => {
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const size = await program.methods
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.getAddressInfoSize()
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.accounts({ dataAccount: dataAccount.publicKey })
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.view()
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console.log("Size:", size.toNumber())
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})
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})

‎basics/account-data/solang/tsconfig.json‎

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{
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"compilerOptions": {
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"types": ["mocha", "chai"],
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"typeRoots": ["./node_modules/@types"],
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"lib": ["es2015"],
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"module": "commonjs",
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"target": "es6",
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"esModuleInterop": true
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}
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}
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‎basics/checking-accounts/solang/.gitignore‎

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.anchor
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.DS_Store
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target
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**/*.rs.bk
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node_modules
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test-ledger
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.yarn

‎basics/checking-accounts/solang/Anchor.toml‎

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[features]
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seeds = false
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skip-lint = false
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[programs.localnet]
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checking_accounts = "F1ipperKF9EfD821ZbbYjS319LXYiBmjhzkkf5a26rC"
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[registry]
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url = "https://api.apr.dev"
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[provider]
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cluster = "Localnet"
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wallet = "~/.config/solana/id.json"
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[scripts]
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test = "yarn run ts-mocha -p ./tsconfig.json -t 1000000 tests/**/*.ts"

‎basics/checking-accounts/solang/package.json‎

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{
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"scripts": {
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"lint:fix": "prettier */*.js \"*/**/*{.js,.ts}\" -w",
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"lint": "prettier */*.js \"*/**/*{.js,.ts}\" --check"
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},
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"dependencies": {
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"@coral-xyz/anchor": "^0.28.0"
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},
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"devDependencies": {
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"chai": "^4.3.4",
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"mocha": "^9.0.3",
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"ts-mocha": "^10.0.0",
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"@types/bn.js": "^5.1.0",
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"@types/chai": "^4.3.0",
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"@types/mocha": "^9.0.0",
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"typescript": "^4.3.5",
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"prettier": "^2.6.2"
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}
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}

‎basics/checking-accounts/solang/solidity/checking-accounts.sol‎

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import "solana";
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@program_id("F1ipperKF9EfD821ZbbYjS319LXYiBmjhzkkf5a26rC")
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contract checking_accounts {
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// The dataAccount is unused in this example, but is a required account when using Solang
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@payer(payer) // "payer" is the account that pays to create the dataAccount
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constructor(address payer) {}
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function checkAccounts(address accountToChange, address accountToCreate) public view {
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print("Number of Accounts Provided: {:}".format(tx.accounts.length));
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// Find the accounts we are looking for and perform checks on them
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for (uint64 i = 0; i < tx.accounts.length; i++) {
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if (tx.accounts[i].key == accountToChange) {
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print("Found Account To Change");
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programOwnerCheck(tx.accounts[i]);
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}
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if (tx.accounts[i].key == accountToCreate) {
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print("Found Account To Create");
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notInitializedCheck(tx.accounts[i]);
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signerCheck(tx.accounts[i]);
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}
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}
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// (Create account...) (unimplemented)
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// (Change account...) (unimplemented)
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}
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function programOwnerCheck(AccountInfo account) internal pure {
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print("Progam Owner Check");
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// The owner of this account should be this program
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require(account.owner == type(checking_accounts).program_id, "Account to change does not have the correct program id.");
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}
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function notInitializedCheck(AccountInfo account) internal pure {
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print("Check Account Not Initialized");
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// This account should not be initialized (has no lamports)
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require(account.lamports == 0, "The program expected the account to create to not yet be initialized.");
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}
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function signerCheck(AccountInfo account) internal pure {
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print("Check Account Signed Transaction");
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// This account should be a signer on the transaction
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require(account.is_signer, "Account required to be a signer");
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}
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}

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