init

yarn-project/pxe/src/database/contracts/contract_artifact_db.ts

@@ -9,6 +9,7 @@ export interface ContractArtifactDatabase {
    * Adds a new contract artifact to the database or updates an existing one.
    * @param id - Id of the corresponding contract class.
    * @param contract - Contract artifact to add.
+   * @throws - If there are duplicate private function selectors.
    */
   addContractArtifact(id: Fr, contract: ContractArtifact): Promise<void>;
   /**

yarn-project/pxe/src/database/kv_pxe_database.ts

@@ -9,7 +9,7 @@ import {
   type TaggingSecret,
   computePoint,
 } from '@aztec/circuits.js';
-import { type ContractArtifact } from '@aztec/foundation/abi';
+import { type ContractArtifact, FunctionSelector, FunctionType } from '@aztec/foundation/abi';
 import { toBufferBE } from '@aztec/foundation/bigint-buffer';
 import { Fr } from '@aztec/foundation/fields';
 import {
@@ -129,6 +129,16 @@ export class KVPxeDatabase implements PxeDatabase {
   }
 
   public async addContractArtifact(id: Fr, contract: ContractArtifact): Promise<void> {
+    const privateSelectors = contract.functions
+      .filter(functionArtifact => functionArtifact.functionType === FunctionType.PRIVATE)
+      .map(privateFunctionArtifact =>
+        FunctionSelector.fromNameAndParameters(privateFunctionArtifact.name, privateFunctionArtifact.parameters),
+      );
+
+    if (privateSelectors.length !== new Set(privateSelectors).size) {
+      throw new Error('Repeated function selectors of private functions');
+    }
+
     await this.#contractArtifacts.set(id.toString(), contractArtifactToBuffer(contract));
   }