Allow wallet to post externally created txns

[ericjohncarlson]

With @deasydoesit's additions for the ability for the helium wallet to create transactions offline, this allows a user to create a wallet, stake a validator, transfer a validator and create a payment transaction all while in an air gapped state. This txn then can be posted manually to the API through a variety of methods.

A way to make this air gapped situation more approachable would be to allow a non-air gapped helium wallet binary to post a txn that was created from an air gapped wallet.

The process would be:

• user create helium wallet, including wallet.key and password on an air-gapped machine without network access
• user has HNT in wallet through payment transaction, earnings, etc.
• user creates transaction to stake validator with command similar to ./helium-wallet --format json validators stake --fee 35000 Y3kjkj4kdrjZzRV1udPD1Sdgkjdfkj3kj3kj2bFwNEEKVHzN5GCyN6iw 10000
• json received such as

  {
  "fee": 35000,
  "hash": null,
  "txn": "6gGTAQohEGXvQGaz/15SaD143sF1VZ3QrFT3Iri4u14gjeTJHZn1EiERHkLMINj+ys/cl88dxF8G4vfZQoh+p20PrN8/EafJNtwYgKCUpY0dIkBU6hgBtOfMXqATl2DKVIeGh7TehO1hc02XnOphci0O3TwGldeASltawTr53kJqOFJGFxp6bMHJgHRuV3xnWaoMKLiRAg==",
  "validator": "Y3kjkj4kdrjZzRV1udPD1Sdgkjdfkj3kj3kj2bFwNEEKVHzN5GCyN6iw"
  }

• user moves txn base64 value from air gapped machine to another machine with internet connectivity
• user publishes transaction to API with a command similar to ./helium-wallet post-transaction 6gGTAQohEGXvQGaz/15SaD143sF1VZ3QrFT3Iri4u14gjeTJHZn1EiERHkLMINj+ys/cl88dxF8G4vfZQoh+p20PrN8/EafJNtwYgKCUpY0dIkBU6hgBtOfMXqATl2DKVIeGh7TehO1hc02XnOphci0O3TwGldeASltawTr53kJqOFJGFxp6bMHJgHRuV3xnWaoMKLiRAg==
• user receives hash, validates hash, transaction posts.

This would allow users who are unfamiliar with the API to post transactions.

• BONUS IDEA Not for this project, but instead of --format json in the stake command, use --qr to create a QR code of the txn hash. Then allow the Helium Mobile Application scan that QR code and post the transaction to the Helium API.

[madninja]

So creating and posting a json blob to the pending_transactions endpoint of the form

{
    "txn": "<base64>"
}

is not easy enough?

[ericjohncarlson]

I don't know why a Helium network user needs to be an expert in posting json to API endpoints from the command line to be able to run a pay or stake transaction if they want to keep their wallet air-gapped, but if you feel this is a stretch in functionality and not needed, then mark it closed.

The ability for the Helium mobile app to post a txn from an offline wallet generated QR code would be way to go.

[madninja]

I don't know why a Helium network user needs to be an expert in posting json to API endpoints from the command line to be able to run a pay or stake transaction if they want to keep their wallet air-gapped, but if you feel this is a stretch in functionality and not needed, then mark it closed.

I was just asking.. hence the not closing..

The ability for the Helium mobile app to post a txn from an offline wallet generated QR code would be way to go.