Example for verifying an Off-chain Attestation

README.md

@@ -269,6 +269,59 @@ const transaction = await eas.multiRevokeOffchain([data1, data2]);
 await transaction.wait();
 ```
 
+### Verify an Off-chain Attestation
+
+To verify an off-chain attestation, you can use the `verifyOffchainAttestationSignature` function provided by the EAS SDK. Here's an example:
+
+```javascript
+import { OFFCHAIN_ATTESTATION_VERSION, Offchain, PartialTypedDataConfig } from "@ethereum-attestation-service/eas-sdk";
+
+const attestation = {
+  // your offchain attestation
+  sig: {
+    domain: {
+      name: "EAS Attestation",
+      version: "0.26",
+      chainId: 1,
+      verifyingContract: "0xA1207F3BBa224E2c9c3c6D5aF63D0eb1582Ce587",
+    },
+    primaryType: "Attest",
+    types: {
+      Attest: [],
+    },
+    signature: {
+      r: "",
+      s: "",
+      v: 28,
+    },
+    uid: "0x5134f511e0533f997e569dac711952dde21daf14b316f3cce23835defc82c065",
+    message: {
+      version: 1,
+      schema: "0x27d06e3659317e9a4f8154d1e849eb53d43d91fb4f219884d1684f86d797804a",
+      refUID: "0x0000000000000000000000000000000000000000000000000000000000000000",
+      time: 1671219600,
+      expirationTime: 0,
+      recipient: "0xFD50b031E778fAb33DfD2Fc3Ca66a1EeF0652165",
+      attester: "0x1e3de6aE412cA218FD2ae3379750388D414532dc",
+      revocable: true,
+      data: "0x0000000000000000000000000000000000000000000000000000000000000000",
+    },
+  },
+  signer: "0x1e3de6aE412cA218FD2ae3379750388D414532dc",
+};
+
+const EAS_CONFIG: PartialTypedDataConfig = {
+  address: attestation.sig.domain.verifyingContract,
+  version: attestation.sig.domain.version,
+  chainId: attestation.sig.domain.chainId,
+};
+const offchain = new Offchain(EAS_CONFIG, OFFCHAIN_ATTESTATION_VERSION);
+const isValidAttestation = offchain.verifyOffchainAttestationSignature(
+  attestation.signer,
+  attestation.sig
+);
+```
+
 ### Registering a Schema
 
 To register a new schema, you can use the `register` function provided by the EAS SDK. This function takes an object with the following properties: