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C# template improvement: Add an UpdateContract method #87

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Merged
merged 3 commits into from
May 27, 2021
Merged

C# template improvement: Add an UpdateContract method #87

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ba4b928
C# template improvement: Add an UpdateContract method. Fixes #74
djnicholson May 27, 2021
5bbc2c8
C# sample contract now provides scaffolding for a ContractUpdate method
djnicholson May 27, 2021
9c84a09
Merge branch 'master' into templateupdate
djnicholson May 27, 2021
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4 changes: 4 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -6,6 +6,10 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how

## Unreleased

### Changed

- C# sample contract now provides scaffolding for a ContractUpdate method

## [2.1.45] - 2021-05-18

### Removed
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42 changes: 28 additions & 14 deletions resources/new-contract/csharp/$_CLASSNAME_$.cs.template.txt
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Expand Up @@ -2,7 +2,9 @@
using System.ComponentModel;
using System.Numerics;

using Neo;
using Neo.SmartContract.Framework;
using Neo.SmartContract.Framework.Native;
using Neo.SmartContract.Framework.Services;

namespace $_CONTRACTNAME_$
Expand All @@ -13,10 +15,13 @@ namespace $_CONTRACTNAME_$
[ManifestExtra("Description", "Describe your contract...")]
public class $_CLASSNAME_$ : SmartContract
{
const string MAP_NAME = "$_CLASSNAME_$";
private static StorageMap ContractStorage => new StorageMap(Storage.CurrentContext, "$_CLASSNAME_$");
private static StorageMap ContractMetadata => new StorageMap(Storage.CurrentContext, "Metadata");

private static Transaction Tx => (Transaction) Runtime.ScriptContainer;

[DisplayName("NumberChanged")]
public static event Action<Neo.UInt160, BigInteger> OnNumberChanged;
public static event Action<UInt160, BigInteger> OnNumberChanged;

public static bool ChangeNumber(BigInteger positiveNumber)
{
Expand All @@ -25,24 +30,33 @@ namespace $_CONTRACTNAME_$
throw new Exception("Only positive numbers are allowed.");
}

var tx = (Transaction) Runtime.ScriptContainer;

var storageMap = new StorageMap(Storage.CurrentContext, MAP_NAME);

storageMap.Put(tx.Sender, positiveNumber);

OnNumberChanged(tx.Sender, positiveNumber);

ContractStorage.Put(Tx.Sender, positiveNumber);
OnNumberChanged(Tx.Sender, positiveNumber);
return true;
}

public static ByteString GetNumber()
[DisplayName("_deploy")]
public static void Deploy(object data, bool update)
{
var tx = (Transaction) Runtime.ScriptContainer;
if (!update)
{
ContractMetadata.Put("Owner", (ByteString) Tx.Sender);
}
}

var storageMap = new StorageMap(Storage.CurrentContext, MAP_NAME);
public static ByteString GetNumber()
{
return ContractStorage.Get(Tx.Sender);
}

return storageMap.Get(tx.Sender);
public static void UpdateContract(ByteString nefFile, string manifest)
{
ByteString owner = ContractMetadata.Get("Owner");
if (!Tx.Sender.Equals(owner))
{
throw new Exception("Only the contract owner can do this");
}
ContractManagement.Update(nefFile, manifest, null);
}
}
}