feat: check chainsync status before creating batch (#614)

Author: Cafe137

src/command/stamp/buy.ts

@@ -2,6 +2,7 @@ import { BatchId, Utils } from '@ethersphere/bee-js'
 import { Dates, Numbers } from 'cafe-utility'
 import { BigNumber } from 'ethers'
 import { LeafCommand, Option } from 'furious-commander'
+import { isChainStateReady } from '../../utils/chainsync'
 import { createSpinner } from '../../utils/spinner'
 import { createKeyValue } from '../../utils/text'
 import { VerbosityLevel } from '../root-command/command-log'
@@ -59,6 +60,14 @@ export class Buy extends StampCommand implements LeafCommand {
   public async run(): Promise<void> {
     super.init()
 
+    if (!(await isChainStateReady(this.bee))) {
+      this.console.error('Synchronization with the blockchain is not yet complete.')
+      this.console.error('Please wait until the Bee is fully synced before buying a postage stamp.')
+      this.console.error('You can check the synchronization status with the "status" command.')
+
+      return
+    }
+
     const chainState = await this.bee.getChainState()
     const minimumAmount = BigNumber.from(chainState.currentPrice).mul(17280)
 

src/command/stamp/create.ts

@@ -1,6 +1,7 @@
 import { BatchId, Duration, Size } from '@ethersphere/bee-js'
 import { Dates, Numbers } from 'cafe-utility'
 import { LeafCommand, Option } from 'furious-commander'
+import { isChainStateReady } from '../../utils/chainsync'
 import { createSpinner } from '../../utils/spinner'
 import { createKeyValue } from '../../utils/text'
 import { VerbosityLevel } from '../root-command/command-log'
@@ -43,6 +44,14 @@ export class Create extends StampCommand implements LeafCommand {
   public async run(): Promise<void> {
     super.init()
 
+    if (!(await isChainStateReady(this.bee))) {
+      this.console.error('Synchronization with the blockchain is not yet complete.')
+      this.console.error('Please wait until the Bee is fully synced before buying a postage stamp.')
+      this.console.error('You can check the synchronization status with the "status" command.')
+
+      return
+    }
+
     if (!this.capacity) {
       this.console.log('Please provide the total capacity of the postage stamp batch')
       this.console.log('This represents the total size of data that can be uploaded')

src/utils/chainsync.ts

@@ -0,0 +1,9 @@
+import { Bee } from '@ethersphere/bee-js'
+
+const THRESHOLD = 10_000
+
+export async function isChainStateReady(bee: Bee): Promise<boolean> {
+  const chainState = await bee.getChainState()
+
+  return chainState.chainTip > chainState.block - THRESHOLD
+}