upd

README.md

@@ -6,7 +6,7 @@ This repository provides instructions on how to deploy your smart contract to th
 
 ## Example deploy address for Merged Precompiles 0x69420
 
-[0x38dB0039707Bc60972D79eC8E752CA21aAfb0Ea2](https://explorer.wvm.dev/address/0x38dB0039707Bc60972D79eC8E752CA21aAfb0Ea2)
+[0x9fb0F63B569f9FD8718Bbb2856a4b6F2458C2d70](https://explorer.wvm.dev/address/0x9fb0F63B569f9FD8718Bbb2856a4b6F2458C2d70)
 
 ## Prerequisites
 
@@ -22,10 +22,18 @@ forge create src/MergedPrecompiles0x69420.sol:MergedPrecompiles0x69420 --rpc-url
 ## Calling methods
 
 ```sh
-cast call 0x38dB0039707Bc60972D79eC8E752CA21aAfb0Ea2 "read_from_arweave(string)" <ArweaveTXID> --rpc-url https://testnet-rpc.wvm.dev
+cast call 0x9fb0F63B569f9FD8718Bbb2856a4b6F2458C2d70 "read_from_arweave(string)" <ArweaveTXID> --rpc-url https://testnet-rpc.wvm.dev
 
-cast call 0x38dB0039707Bc60972D79eC8E752CA21aAfb0Ea2 "upload_to_arweave(string)" <dataString> --rpc-url https://testnet-rpc.wvm.dev
+cast call 0x9fb0F63B569f9FD8718Bbb2856a4b6F2458C2d70 "upload_to_arweave(string)" <dataString> --rpc-url https://testnet-rpc.wvm.dev
 ```
+
+Helper method example:
+
+```sh
+sh ./script/upload.sh
+```
+Feel free to substitute / change the contract address
+
 ## Notes
 
 - The RPC URL `https://testnet-rpc.wvm.dev` is for the WVM testnet.

script/upload.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+cast_output=$(cast call 0x9fb0F63B569f9FD8718Bbb2856a4b6F2458C2d70 "upload_to_arweave(string)" "hello world!" --rpc-url https://testnet-rpc.wvm.dev)
+
+data_hex=$(echo "$cast_output" | cut -c 129-214)
+
+# Decode the hex data to get the Arweave transaction hash
+tx_hash=$(echo "$data_hex" | xxd -r -p)
+
+# Generate the viewblock.io URL using the extracted transaction hash
+viewblock_url="https://viewblock.io/arweave/tx/$tx_hash"
+
+# Output the URL
+echo "$viewblock_url"

src/MergedPrecompiles0x69420.sol

@@ -4,18 +4,18 @@ pragma solidity ^0.8.0;
 // THIS CODE IS LIT 🌿🔥
 
 contract MergedPrecompiles0x69420 {
-    function read_from_arweave(string memory txIdOrGatewayAndTxId) public view returns (bytes memory) {
+    function read_from_arweave(string memory txIdOrGatewayAndTxId) public view returns (string memory) {
         bytes memory data = abi.encodePacked(txIdOrGatewayAndTxId);
         (bool success, bytes memory result) = address(0x18).staticcall(data);
         require(success, "ArweaveReader: read operation failed");
-        return result;
+        return string(result);
     }
 
-    function upload_to_arweave(string memory dataString) public view returns (bytes memory) {
+    function upload_to_arweave(string memory dataString) public returns (string memory) {
         bytes memory data = abi.encodePacked(dataString);
         (bool success, bytes memory result) = address(0x17).staticcall(data);
         require(success, "ArweaveUploader: upload operation failed");
-        return result;
+        return string(result);
     }
 
 }

test/MergedPrecompiles0x69420.t.sol

@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "forge-std/Test.sol";
+import "../src/MergedPrecompiles0x69420.sol";
+
+contract MergedPrecompiles0x69420Test is Test {
+    MergedPrecompiles0x69420 public precompile;
+
+    // Events we want to test
+    event UploadAttempted(string data, bool success);
+    event UploadError(string reason);
+    event ReadAttempted(string txId, bool success);
+    event ReadError(string reason);
+
+    function setUp() public {
+        precompile = new MergedPrecompiles0x69420();
+    }
+
+    function testReadFromArweave() public {
+        // Mock the precompile call
+        vm.mockCall(
+            address(0x18),
+            abi.encodePacked("test_tx_id"),
+            abi.encodePacked("mocked_result")
+        );
+
+        bytes memory result = precompile.read_from_arweave("test_tx_id");
+        assertEq(result, "mocked_result");
+    }
+
+    function testReadFromArweaveFailure() public {
+        // Mock a failed precompile call
+        vm.mockCallRevert(
+            address(0x18),
+            abi.encodePacked("invalid_tx_id"),
+            "Read operation failed"
+        );
+
+        vm.expectRevert("ArweaveReader: read operation failed");
+        precompile.read_from_arweave("invalid_tx_id");
+    }
+
+    function testUploadToArweave() public {
+        // Mock successful upload
+        vm.mockCall(
+            address(0x17),
+            abi.encodePacked("test_data"),
+            abi.encodePacked("mocked_tx_id")
+        );
+
+        // Expect the UploadAttempted event to be emitted
+        vm.expectEmit(true, true, true, true);
+        emit UploadAttempted("test_data", true);
+
+        bytes memory result = precompile.upload_to_arweave("test_data");
+        assertEq(result, "mocked_tx_id");
+    }
+}