message: indexer-service: Remove _findTransfer helper
diff: @@ -220,10 +220,6 @@ export class ReceiptManager {
  )
  }
  - private _findTransfer(vectorTransferId: string): Promise<ReceiptsTransfer> {
  - return this._transferCache.get(vectorTransferId)
  - }
  -
  // Saves the payment and returns the allocation for signing
  async add(receiptData: string): Promise<string> {
  // Security: Input validation
  @@ -236,7 +232,7 @@ export class ReceiptManager {
  // This should always work for valid transfers (aside from eg: network failures)
  // The Gateway initiates a transfer, but won't use it until there is a double-signed
  // commitment. That means our Vector node should know about it.
  - const transfer = await this._findTransfer(vectorTransferId)
  + const transfer = await this._transferCache.get(vectorTransferId)
  const signature = validateSignature(transfer, receiptData)
  