rpc system nonce (#155)

* add system_account_nonce rpc

* fix type

* update toolchain

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
     - name: Install toolchain
       uses: dtolnay/rust-toolchain@nightly
       with:
-        toolchain: nightly-2022-10-16
+        toolchain: nightly-2022-10-30
         components: rustfmt
         target: wasm32-unknown-unknown
     - name: Use Node.js

.github/workflows/publish.yml

@@ -23,7 +23,7 @@ jobs:
     - name: Install toolchain
       uses: dtolnay/rust-toolchain@nightly
       with:
-        toolchain: nightly-2022-10-16
+        toolchain: nightly-2022-10-30
         components: rustfmt
         target: wasm32-unknown-unknown
     - name: Use Node.js

e2e/system.test.ts

@@ -15,5 +15,8 @@ describe('system rpc', () => {
       isSyncing: false,
       shouldHavePeers: false,
     })
+    expect((await api.rpc.system.accountNextIndex('5EYCAe5fiQJsoMt16QywpBQwyn5cgfkXFFJApwwKPXFoF2h7')).toNumber()).toBe(
+      0
+    )
   })
 })

rust-toolchain.toml

@@ -1,4 +1,4 @@
 [toolchain]
-channel = "nightly-2022-10-16"
+channel = "nightly-2022-10-30"
 targets = [ "wasm32-unknown-unknown" ]
 profile = "minimal"

src/rpc/substrate/system.ts

@@ -1,3 +1,7 @@
+import { Index } from '@polkadot/types/interfaces'
+import { hexToU8a } from '@polkadot/util'
+import { readFileSync } from 'node:fs'
+
 import { Handlers } from '../shared'
 
 const handlers: Handlers = {
@@ -11,7 +15,8 @@ const handlers: Handlers = {
     return context.chain.api.getSystemName()
   },
   system_version: async (_context) => {
-    return 'chopsticks-1.1.0'
+    const { version } = JSON.parse(readFileSync('package.json', 'utf-8'))
+    return `chopsticks-v${version}`
   },
   system_chainType: async (_context) => {
     return 'Development'
@@ -27,6 +32,13 @@ const handlers: Handlers = {
     const { outcome } = await context.chain.dryRunExtrinsic(extrinsic, at)
     return outcome.toHex()
   },
+  system_accountNextIndex: async (context, [address]) => {
+    const head = context.chain.head
+    const registry = await head.registry
+    const account = registry.createType('AccountId32', address)
+    const result = await head.call('AccountNonceApi_account_nonce', account.toHex())
+    return registry.createType<Index>('Index', hexToU8a(result.result)).toNumber()
+  },
 }
 
 export default handlers