[WIP] Add methods in SnapSigner to request permission before pay

packages/nitro-client/package.json

@@ -59,7 +59,7 @@
     "assert": "^2.0.0",
     "debug": "^4.3.4",
     "ethers": "^5.7.2",
-    "it-pipe": "^2.0.5",
+    "it-pipe": "^3.0.1",
     "level": "^8.0.0",
     "lodash": "^4.17.21",
     "promjs": "^0.4.2",

packages/nitro-client/src/client/engine/store/durablestore.ts

@@ -582,10 +582,10 @@ export class DurableStore implements Store {
     }
   }
 
-  setVoucherInfo(channelId: Destination, v: VoucherInfo): void {
+  async setVoucherInfo(channelId: Destination, v: VoucherInfo): Promise<void> {
     const vJSON = Buffer.from(JSONbigNative.stringify(v));
 
-    this.vouchers!.put(channelId.string(), vJSON);
+    await this.vouchers!.put(channelId.string(), vJSON);
   }
 
   async getVoucherInfo(channelId: Destination): Promise<[VoucherInfo | undefined, boolean]> {

packages/nitro-client/src/payments/voucher-manager.ts

@@ -10,7 +10,7 @@ import { Voucher, VoucherInfo } from './vouchers';
 // VoucherStore is an interface for storing voucher information that the voucher manager expects.
 // To avoid import cycles, this interface is defined in the payments package, but implemented in the store package.
 export interface VoucherStore {
-  setVoucherInfo (channelId: Destination, v: VoucherInfo): void
+  setVoucherInfo (channelId: Destination, v: VoucherInfo): void | Promise<void>
 
   getVoucherInfo (channelId: Destination): [VoucherInfo | undefined, boolean] | Promise<[VoucherInfo | undefined, boolean]>
 
@@ -49,7 +49,7 @@ export class VoucherManager {
       throw new Error('Channel already registered');
     }
 
-    this.store.setVoucherInfo(channelId, data);
+    await this.store.setVoucherInfo(channelId, data);
   }
 
   // Remove deletes the channel's status
@@ -85,7 +85,7 @@ export class VoucherManager {
 
     await voucher.sign(signer);
 
-    this.store.setVoucherInfo(channelId, vInfo);
+    await this.store.setVoucherInfo(channelId, vInfo);
 
     return voucher;
   }
@@ -120,7 +120,7 @@ export class VoucherManager {
 
     vInfo.largestVoucher = voucher;
 
-    this.store.setVoucherInfo(voucher.channelId, vInfo);
+    await this.store.setVoucherInfo(voucher.channelId, vInfo);
     return received;
   }
 

packages/nitro-client/src/utils/signers/snap-signer.ts

@@ -1,6 +1,7 @@
 import { Signature, ethers } from 'ethers';
 
-import { NitroSigner } from '@cerc-io/nitro-util';
+import { NitroSigner, JSONbigNative } from '@cerc-io/nitro-util';
+import { RateInfo, RateType } from '../types';
 
 export class SnapSigner implements NitroSigner {
   private provider: ethers.providers.ExternalProvider;
@@ -52,4 +53,39 @@ export class SnapSigner implements NitroSigner {
 
     return signature as Signature;
   }
+
+  async updateRates(endpoint: string, rates: RateInfo[]): Promise<void> {
+    await (this.provider.request as any)({
+      method: 'wallet_invokeSnap',
+      params: {
+        snapId: this.snapOrigin,
+        request: {
+          method: 'updateRates',
+          params: {
+            endpoint,
+            rates: JSONbigNative.stringify(rates),
+          },
+        },
+      },
+    });
+  }
+
+  async requestPermission(endpoint: string, rateType: RateType, name: string): Promise<boolean> {
+    const result = await (this.provider.request as any)({
+      method: 'wallet_invokeSnap',
+      params: {
+        snapId: this.snapOrigin,
+        request: {
+          method: 'requestPermission',
+          params: {
+            endpoint,
+            name,
+            rateType,
+          },
+        },
+      },
+    });
+
+    return Boolean(result);
+  }
 }

packages/nitro-client/src/utils/types.ts

@@ -3,3 +3,14 @@ export interface Actor {
   privateKey: string;
   chainPrivateKey: string;
 }
+
+export enum RateType {
+  Query = 'QUERY',
+  Mutation = 'MUTATION',
+}
+
+export interface RateInfo {
+  type: RateType;
+  name: string;
+  amount: bigint;
+}

packages/server/package.json

@@ -28,7 +28,6 @@
     "cli": "DEBUG=ts-nitro:* ts-node src/index.ts",
     "lint": "eslint .",
     "test:e2e": "mocha test-e2e/**/*.test.ts --bail",
-    "test:deploy-contracts": "DEBUG=ts-nitro:* yarn ts-node test-e2e/scripts/deploy-contracts.ts",
     "chain": "hardhat node"
   },
   "dependencies": {