diff --git a/contracts/coins/OpethWalletSimple.sol b/contracts/coins/OpethWalletSimple.sol
new file mode 100644
index 0000000..c8f8626
--- /dev/null
+++ b/contracts/coins/OpethWalletSimple.sol
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: Apache-2.0
+pragma solidity 0.8.20;
+import '../Forwarder.sol';
+import '../ERC20Interface.sol';
+import '../WalletSimple.sol';
+
+/**
+ *
+ * WalletSimple
+ * ============
+ *
+ * Basic multi-signer wallet designed for use in a co-signing environment where 2 signatures are required to move funds.
+ * Typically used in a 2-of-3 signing configuration. Uses ecrecover to allow for 2 signatures in a single transaction.
+ *
+ * The first signature is created on the operation hash (see Data Formats) and passed to sendMultiSig/sendMultiSigToken
+ * The signer is determined by verifyMultiSig().
+ *
+ * The second signature is created by the submitter of the transaction and determined by msg.signer.
+ *
+ * Data Formats
+ * ============
+ *
+ * The signature is created with ethereumjs-util.ecsign(operationHash).
+ * Like the eth_sign RPC call, it packs the values as a 65-byte array of [r, s, v].
+ * Unlike eth_sign, the message is not prefixed.
+ *
+ * The operationHash the result of keccak256(prefix, toAddress, value, data, expireTime).
+ * For ether transactions, `prefix` is "OPETH".
+ * For token transaction, `prefix` is "OPETH-ERC20" and `data` is the tokenContractAddress.
+ *
+ *
+ */
+contract OpethWalletSimple is WalletSimple {
+  /**
+   * Get the network identifier that signers must sign over
+   * This provides protection signatures being replayed on other chains
+   */
+  function getNetworkId() internal override pure returns (string memory) {
+    return 'OPETH';
+  }
+
+  /**
+   * Get the network identifier that signers must sign over for token transfers
+   * This provides protection signatures being replayed on other chains
+   */
+  function getTokenNetworkId() internal override pure returns (string memory) {
+    return 'OPETH-ERC20';
+  }
+
+  /**
+   * Get the network identifier that signers must sign over for batch transfers
+   * This provides protection signatures being replayed on other chains
+   */
+  function getBatchNetworkId() internal override pure returns (string memory) {
+    return 'OPETH-Batch';
+  }
+}
diff --git a/test/walletSimple.js b/test/walletSimple.js
index 625b200..b844b88 100644
--- a/test/walletSimple.js
+++ b/test/walletSimple.js
@@ -30,6 +30,7 @@ const EtcWalletSimple = artifacts.require('./EtcWalletSimple.sol');
 const CeloWalletSimple = artifacts.require('./CeloWalletSimple.sol');
 const PolygonWalletSimple = artifacts.require('./PolygonWalletSimple.sol');
 const ArbethWalletSimple = artifacts.require('./ArbethWalletSimple.sol');
+const OpethWalletSimple = artifacts.require('./OpethWalletSimple.sol');
 const Fail = artifacts.require('./Fail.sol');
 const GasGuzzler = artifacts.require('./GasGuzzler.sol');
 const GasHeavy = artifacts.require('./GasHeavy.sol');
@@ -87,6 +88,13 @@ const coins = [
     nativeBatchPrefix: 'ARBETH-Batch',
     tokenPrefix: 'ARBETH-ERC20',
     WalletSimple: ArbethWalletSimple
+  },
+  {
+    name: 'Opeth',
+    nativePrefix: 'OPETH',
+    nativeBatchPrefix: 'OPETH-Batch',
+    tokenPrefix: 'OPETH-ERC20',
+    WalletSimple: OpethWalletSimple
   }
 ];