Write contract action

Author: taitsengstock

README.md

@@ -82,7 +82,7 @@ Visit [http://localhost:3000](http://localhost:3000) to get started.
 - **Resend**: Send Email
 - **Slack**: Send Slack Message
 - **v0**: Create Chat, Send Message
-- **Web3**: Transfer Funds, Read Contract
+- **Web3**: Transfer Funds, Read Contract, Write Contract
 <!-- PLUGINS:END -->
 
 ## Code Generation

components/workflow/config/action-config-renderer.tsx

@@ -116,6 +116,7 @@ function SchemaBuilderField(props: FieldProps) {
 
 type AbiFunctionSelectProps = FieldProps & {
   abiValue: string;
+  functionFilter?: "read" | "write";
 };
 
 function AbiFunctionSelectField({
@@ -124,6 +125,7 @@ function AbiFunctionSelectField({
   onChange,
   disabled,
   abiValue,
+  functionFilter = "read",
 }: AbiFunctionSelectProps) {
   // Parse ABI and extract functions
   const functions = React.useMemo(() => {
@@ -137,12 +139,18 @@ function AbiFunctionSelectField({
         return [];
       }
 
-      // Extract only read-only functions (view/pure) from the ABI
+      // Filter functions based on functionFilter prop
+      const filterFn = functionFilter === "write"
+        ? (item: { type: string; stateMutability?: string }) =>
+            item.type === "function" &&
+            item.stateMutability !== "view" &&
+            item.stateMutability !== "pure"
+        : (item: { type: string; stateMutability?: string }) =>
+            item.type === "function" &&
+            (item.stateMutability === "view" || item.stateMutability === "pure");
+
       return abi
-        .filter((item) =>
-          item.type === "function" &&
-          (item.stateMutability === "view" || item.stateMutability === "pure")
-        )
+        .filter(filterFn)
         .map((func) => {
           const inputs = func.inputs || [];
           const params = inputs
@@ -160,7 +168,7 @@ function AbiFunctionSelectField({
     } catch {
       return [];
     }
-  }, [abiValue]);
+  }, [abiValue, functionFilter]);
 
   if (functions.length === 0) {
     return (
@@ -341,6 +349,7 @@ function renderField(
           abiValue={abiValue}
           disabled={disabled}
           field={field}
+          functionFilter={field.functionFilter}
           onChange={(val) => onUpdateConfig(field.key, val)}
           value={value}
         />

components/workflow/node-config-panel.tsx

@@ -697,8 +697,9 @@ export const PanelInner = () => {
             {selectedNode.data.type !== "action" ||
             selectedNode.data.config?.actionType ? (
               <>
-                {/* Hide Label and Description for read-contract action */}
-                {selectedNode.data.config?.actionType !== "web3/read-contract" && (
+                {/* Hide Label and Description for read-contract and write-contract actions */}
+                {selectedNode.data.config?.actionType !== "web3/read-contract" &&
+                  selectedNode.data.config?.actionType !== "web3/write-contract" && (
                   <>
                     <div className="space-y-2">
                       <Label className="ml-1" htmlFor="label">

plugins/registry.ts

@@ -62,6 +62,9 @@ export type ActionConfigFieldBase = {
   // For abi-function-select: which field contains the ABI JSON
   abiField?: string;
 
+  // For abi-function-select: filter functions by type ("read" or "write")
+  functionFilter?: "read" | "write";
+
   // For abi-function-args: which field contains the ABI JSON and selected function
   abiFunctionField?: string;
 };

plugins/web3/index.ts

@@ -118,6 +118,77 @@ const web3Plugin: IntegrationPlugin = {
         },
       ],
     },
+    {
+      slug: "write-contract",
+      label: "Write Contract",
+      description: "Write data to a smart contract (state-changing functions)",
+      category: "Web3",
+      stepFunction: "writeContractStep",
+      stepImportPath: "write-contract",
+      outputFields: [
+        {
+          field: "success",
+          description: "Whether the contract call succeeded",
+        },
+        {
+          field: "transactionHash",
+          description: "The transaction hash of the successful write",
+        },
+        {
+          field: "result",
+          description: "The contract function return value (if any)",
+        },
+        {
+          field: "error",
+          description: "Error message if the call failed",
+        },
+      ],
+      configFields: [
+        {
+          key: "contractAddress",
+          label: "Contract Address",
+          type: "template-input",
+          placeholder: "0x... or {{NodeName.contractAddress}}",
+          example: "0x6B175474E89094C44Da98b954EedeAC495271d0F",
+          required: true,
+        },
+        {
+          key: "network",
+          label: "Network",
+          type: "select",
+          placeholder: "Select network",
+          required: true,
+          options: [
+            { label: "Ethereum Mainnet", value: "mainnet" },
+            { label: "Sepolia Testnet", value: "sepolia" },
+          ],
+        },
+        {
+          key: "abi",
+          label: "Contract ABI",
+          type: "template-textarea",
+          placeholder: "Paste contract ABI JSON here",
+          rows: 6,
+          required: true,
+        },
+        {
+          key: "abiFunction",
+          label: "Function",
+          type: "abi-function-select",
+          abiField: "abi",
+          functionFilter: "write",
+          placeholder: "Select a function",
+          required: true,
+        },
+        {
+          key: "functionArgs",
+          label: "Function Arguments",
+          type: "abi-function-args",
+          abiField: "abi",
+          abiFunctionField: "abiFunction",
+        },
+      ],
+    },
   ],
 };