ensure did uses etherum_pk, and update readme

ic/managed/verifier/README.md

@@ -37,6 +37,8 @@ To deploy the canister locally, follow these steps:
 
 ### Caveats
 
+#### `clang` dependency
+
 **On macOS:** If you are experiencing issues during `cargo build` where the `ring` library fails to compile, this is typically due to `clang` not being found.
 
 To resolve this, you can install `clang` using Homebrew. 
@@ -51,3 +53,13 @@ Alternatively, you can set the following environment variables:
 export WASI_SDK_PATH=/usr/local/wasi-sdk-25.0
 export CC_wasm32_wasip1="${WASI_SDK_PATH}/bin/clang"
 ```
+
+#### `etherum_pk`
+
+The `etherum_pk` field in the `PublicKeyReply` struct is the Ethereum address derived from the Sec1 public key. This is done using the `get_address_from_public_key` function in the `ethereum` module.
+
+```rust
+let address = ethereum::get_address_from_public_key(res.public_key.clone()).expect("INVALID_PUBLIC_KEY");
+```
+
+*It should be spelled `ethereum_pk` and not `etherum_pk`.*

ic/managed/verifier/verity_verifier.did

@@ -32,7 +32,7 @@ service : {
 	"ping" : () -> (text) query;
 	"verify_proof_direct" : (proof_requests : vec text, notary_pub_key : text) -> (DirectVerificationResult);
 	"verify_proof_async" : (proof_requests : vec text, notary_pub_key : text) -> (ProofVerificationResponse);
-  	"verify_proof_direct_batch": (batches: vec ProofBatch) -> (DirectVerificationResult);
-  	"verify_proof_async_batch" : (batches: vec ProofBatch) -> (ProofVerificationResponse);
-	"public_key" : () -> (record { sec1_pk : text; ethereum_pk : text });
+	"verify_proof_direct_batch": (batches: vec ProofBatch) -> (DirectVerificationResult);
+	"verify_proof_async_batch" : (batches: vec ProofBatch) -> (ProofVerificationResponse);
+	"public_key" : () -> (record { sec1_pk : text; etherum_pk : text });
 };