Add optional value to pass salt to presets (#87)

Author: hazim-j

src/preset/builder/kernel.ts

@@ -91,7 +91,7 @@ export class Kernel extends UserOperationBuilder {
         instance.factory.address,
         instance.factory.interface.encodeFunctionData("createAccount", [
           await instance.signer.getAddress(),
-          ethers.BigNumber.from(0),
+          ethers.BigNumber.from(opts?.salt ?? 0),
         ]),
       ]);
       await instance.entryPoint.callStatic.getSenderAddress(instance.initCode);

src/preset/builder/simpleAccount.ts

@@ -67,7 +67,7 @@ export class SimpleAccount extends UserOperationBuilder {
         instance.factory.address,
         instance.factory.interface.encodeFunctionData("createAccount", [
           await instance.signer.getAddress(),
-          ethers.BigNumber.from(0),
+          ethers.BigNumber.from(opts?.salt ?? 0),
         ]),
       ]);
       await instance.entryPoint.callStatic.getSenderAddress(instance.initCode);

src/types.ts

@@ -106,6 +106,7 @@ export interface ISendUserOperationResponse {
 export interface IPresetBuilderOpts {
   entryPoint?: string;
   factory?: string;
+  salt?: BigNumberish;
   paymasterMiddleware?: UserOperationMiddlewareFn;
   overrideBundlerRpc?: string;
 }