Replace dscp-node package with @polkadot/api (#64)

* use polkadot directly

* version bump

* add api.catch() comment

app/util/substrateApi.js

@@ -1,16 +1,14 @@
-import { buildApi } from '@digicatapult/dscp-node'
+import { ApiPromise, WsProvider, Keyring } from '@polkadot/api'
 
 import env from '../env.js'
 import logger from '../logger.js'
 
 const { API_HOST, API_PORT } = env
 
-const { api, keyring: kr } = buildApi({
- options: {
- apiHost: API_HOST,
- apiPort: API_PORT,
- },
-})
+const provider = new WsProvider(`ws://${API_HOST}:${API_PORT}`)
+const api = new ApiPromise({ provider })
+
+api.isReadyOrError.catch(() => {}) // prevent unhandled promise rejection errors
 
 api.on('disconnected', () => {
  logger.warn(`Disconnected from substrate node at ${API_HOST}:${API_PORT}`)
@@ -25,4 +23,4 @@ api.on('error', (err) => {
 })
 
 export const substrateApi = api
-export const keyring = kr
+export const keyring = new Keyring({ type: 'sr25519' })

helm/dscp-api/Chart.yaml

@@ -1,8 +1,8 @@
 apiVersion: v2
 name: dscp-api
-appVersion: '4.8.1'
+appVersion: '4.8.2'
 description: A Helm chart for dscp-api
-version: '4.8.1'
+version: '4.8.2'
 type: application
 dependencies:
  - name: dscp-node

helm/dscp-api/values.yaml

@@ -38,7 +38,7 @@ service:
 image:
  repository: digicatapult/dscp-api
  pullPolicy: IfNotPresent
- tag: 'v4.8.1'
+ tag: 'v4.8.2'
 
 dscpNode:
  enabled: false