Duplicate function names =/= param count support (#195)

Author: 0xFirekeeper

Assets/Thirdweb/Core/Scripts/Contract.cs

@@ -129,7 +129,7 @@ public async Task<Transaction> Prepare(string functionName, string from = null,
 
                 var web3 = Utils.GetWeb3(_sdk.Session.ChainId, _sdk.Session.Options.clientId, _sdk.Session.Options.bundleId);
                 var contract = web3.Eth.GetContract(this.ABI, this.Address);
-                var function = contract.GetFunction(functionName);
+                var function = Utils.GetFunctionMatchSignature(contract, functionName, args);
                 var fromAddress = from ?? await _sdk.Wallet.GetAddress();
                 initialInput = function.CreateTransactionInput(fromAddress, args);
             }
@@ -147,7 +147,7 @@ public string Encode(string functionName, params object[] args)
         {
             var web3 = Utils.GetWeb3(_sdk.Session.ChainId, _sdk.Session.Options.clientId, _sdk.Session.Options.bundleId);
             var contract = web3.Eth.GetContract(this.ABI, this.Address);
-            var function = contract.GetFunction(functionName);
+            var function = Utils.GetFunctionMatchSignature(contract, functionName, args);
             return function.GetData(args);
         }
 
@@ -161,7 +161,7 @@ public List<ParameterOutput> Decode(string functionName, string encodedArgs)
         {
             var web3 = Utils.GetWeb3(_sdk.Session.ChainId, _sdk.Session.Options.clientId, _sdk.Session.Options.bundleId);
             var contract = web3.Eth.GetContract(this.ABI, this.Address);
-            var function = contract.GetFunction(functionName);
+            var function = Utils.GetFunctionMatchSignature(contract, functionName);
             return function.DecodeInput(encodedArgs);
         }
 
@@ -212,8 +212,8 @@ public async Task<TransactionResult> Write(string functionName, TransactionReque
                 if (this.ABI == null)
                     this.ABI = await FetchAbi(this.Address, await _sdk.Wallet.GetChainId());
 
-                var service = new Nethereum.Contracts.Contract(null, this.ABI, this.Address);
-                var function = service.GetFunction(functionName);
+                var contract = new Nethereum.Contracts.Contract(null, this.ABI, this.Address);
+                var function = Utils.GetFunctionMatchSignature(contract, functionName, args);
                 var data = function.GetData(args);
                 var input = new TransactionInput
                 {
@@ -249,7 +249,7 @@ public async Task<T> Read<T>(string functionName, params object[] args)
 
             var web3 = Utils.GetWeb3(_sdk.Session.ChainId, _sdk.Session.Options.clientId, _sdk.Session.Options.bundleId);
             var contract = web3.Eth.GetContract(this.ABI, this.Address);
-            var function = contract.GetFunction(functionName);
+            var function = Utils.GetFunctionMatchSignature(contract, functionName, args);
             var result = await function.CallDecodingToDefaultAsync(args);
 
             var rawResults = new List<object>();
@@ -386,7 +386,7 @@ public async Task<T> ReadRaw<T>(string functionName, params object[] args)
 
             var web3 = Utils.GetWeb3(_sdk.Session.ChainId, _sdk.Session.Options.clientId, _sdk.Session.Options.bundleId);
             var contract = web3.Eth.GetContract(this.ABI, this.Address);
-            var function = contract.GetFunction(functionName);
+            var function = Utils.GetFunctionMatchSignature(contract, functionName, args);
             return await function.CallDeserializingToObjectAsync<T>(args);
         }
 

Assets/Thirdweb/Core/Scripts/Transaction.cs

@@ -213,7 +213,8 @@ public Transaction SetArgs(params object[] args)
             else
             {
                 var web3 = Utils.GetWeb3(_sdk.Session.ChainId, _sdk.Session.Options.clientId, _sdk.Session.Options.bundleId);
-                var function = web3.Eth.GetContract(Contract.ABI, Contract.Address).GetFunction(Input.To);
+                var contract = web3.Eth.GetContract(Contract.ABI, Contract.Address);
+                var function = Utils.GetFunctionMatchSignature(contract, FunctionName, args);
                 Input.Data = function.GetData(args);
             }
             return this;

Assets/Thirdweb/Core/Scripts/Utils.cs

@@ -764,5 +764,21 @@ public static Dictionary<string, string> GetThirdwebHeaders(string clientId, str
 
             return headers;
         }
+
+        public static Nethereum.Contracts.Function GetFunctionMatchSignature(Nethereum.Contracts.Contract contract, string functionName, params object[] args)
+        {
+            var abi = contract.ContractBuilder.ContractABI;
+            var functions = abi.Functions;
+            int paramsCount = args?.Length ?? 0;
+            foreach (var function in functions)
+            {
+                if (function.Name == functionName && function.InputParameters.Length == paramsCount)
+                {
+                    string sha = function.Sha3Signature;
+                    return contract.GetFunctionBySignature(sha);
+                }
+            }
+            throw new UnityException($"Can't find function {functionName} in contract {contract.Address}, that takes: {paramsCount} arguments");
+        }
     }
 }