C1.0 migration

cadence/contract.cdc

@@ -1,39 +1,42 @@
-//A vault resource to be stored in an account that tracks your balance of tokens
-pub resource Vault: Provider, Receiver, Balance {
+// A vault resource to be stored in an account that tracks your balance of tokens
+access(all)
+resource Vault: Provider, Receiver, Balance {
 
-    // keeps track of the total balance of the account's tokens
-    pub var balance: UFix64
+    // Keeps track of the total balance of the account's tokens
+    access(all)
+    var balance: UFix64
 
-    // initialize the balance at resource creation time
+    // Initialize the balance at resource creation time
     init(balance: UFix64) {
         self.balance = balance
     }
 
-    // withdraw
+    // Withdraw
     //
-    // Function that takes an integer amount as an argument
+    // Function that takes an amount as an argument
     // and withdraws that amount from the Vault.
     //
     // It creates a new temporary Vault that is used to hold
-    // the money that is being transferred. It returns the newly
-    // created Vault to the context that called so it can be deposited
+    // the tokens being transferred. It returns the newly
+    // created Vault to the context that called it so it can be deposited
     // elsewhere.
-    //
-    pub fun withdraw(amount: UFix64): @Vault {
+    access(all)
+    fun withdraw(amount: UFix64): @Vault {
         self.balance = self.balance - amount
         return <-create Vault(balance: amount)
     }
 
-    // deposit
+    // Deposit
     //
     // Function that takes a Vault object as an argument and adds
-    // its balance to the balance of the owners Vault.
+    // its balance to the balance of the owner's Vault.
     //
     // It is allowed to destroy the sent Vault because the Vault
     // was a temporary holder of the tokens. The Vault's balance has
     // been consumed and therefore can be destroyed.
-    pub fun deposit(from: @Vault) {
+    access(all)
+    fun deposit(from: @Vault) {
         self.balance = self.balance + from.balance
         destroy from
     }
-}
+}

cadence/transaction.cdc

@@ -1,30 +1,33 @@
-// Setup Account
-
 import ExampleToken from 0x01
 
 // This transaction configures an account to store and receive tokens defined by
 // the ExampleToken contract.
 transaction {
-	prepare(acct: AuthAccount) {
-		// Create a new empty Vault object
-		let vaultA <- ExampleToken.createEmptyVault()
-			
-		// Store the vault in the account storage
-		acct.save<@ExampleToken.Vault>(<-vaultA, to: /storage/MainVault)
+    prepare(acct: auth(Storage, Capabilities) &Account) {
+        // Create a new empty Vault object
+        let vaultA <- ExampleToken.createEmptyVault()
+        
+        // Store the vault in the account storage
+        acct.storage.save<@ExampleToken.Vault>(<-vaultA, to: /storage/MainVault)
 
-    log("Empty Vault stored")
+        log("Empty Vault stored")
 
-    // Create a public Receiver capability to the Vault
-		let ReceiverRef = acct.link<&ExampleToken.Vault{ExampleToken.Receiver, ExampleToken.Balance}>(/public/MainReceiver, target: /storage/MainVault)
+        // Create a public Receiver capability to the Vault
+        let receiverCap = acct.capabilities.storage.issue<&ExampleToken.Vault{ExampleToken.Receiver, ExampleToken.Balance}>(
+            /storage/MainVault
+        )
+        acct.capabilities.publish(receiverCap, at: /public/MainReceiver)
 
-    log("References created")
-	}
+        log("References created")
+    }
 
     post {
         // Check that the capabilities were created correctly
-        getAccount(0x02).getCapability<&ExampleToken.Vault{ExampleToken.Receiver}>(/public/MainReceiver)
-                        .check():  
-                        "Vault Receiver Reference was not created correctly"
+        assert(
+            getAccount(0x02)
+                .capabilities
+                .borrow<&ExampleToken.Vault{ExampleToken.Receiver}>(/public/MainReceiver) != nil,
+            message: "Vault Receiver Reference was not created correctly"
+        )
     }
 }
-

index.js

@@ -23,6 +23,6 @@ export const tokenVault = {
   transactionCode: transactionPath,
   transactionExplanation: transactionExplanationPath,
   filters: {
-    difficulty: "beginner"
-  }
+    difficulty: "beginner",
+  },
 };