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Peter D. Gray 2024-06-05 10:55:04 -04:00
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docs/nfc-pushtx.md
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@ -30,8 +30,8 @@ The COLDCARD needs a URL prefix. To that it appends some values:
- when RegTest is enabled, the value will be `XRT`
We provide a few default URL values to our customers, including one backend we
will operate. The URL can also be directly entered by the customer. On the Q,
it can be scanned from a QR code.
will operate on `colcard.com`. The URL can also be directly entered by the
customer. On the Q, it can be scanned from a QR code.
For COLDCARD backend, the url used is:
@ -71,6 +71,18 @@ it is now waiting in the mempool.
4k bytes and the NFC implementation of the phone may also have limits.
- The service URL provided must end in `?` or `#` or `&`.
- `base64url` values from COLDCARD will not have padding (`=` bytes) at end.
- POST cannot be used directly because the expect the phone to do a GET on the URL provided.
- Mempool.space's [implementation of this feature](https://github.com/mempool/mempool/pull/5132)
- Honest backends will not log the IP address of incoming transactions, but there is
no way to enforce that, and CloudFlare sees all.
## Example URL
```
https://mempool.space/pushtx#t=AgAAAAOHqK3w3hC6PSC0buthnJA5R9Y88WAlEvm9cifNVUPhIwAAAABqRzBEAiB-M9YprNYoohqHdQHg4wY_qcEMwDmyIQH8prykk8-0KwIgARxcojKrtixicouiUxhk4jQq_MAl11ptIgHDlRjgk5ABIQM4bgMAVDbDSr_9CvLjbg5nxrWnDGI-kVmkfL81GXZtCf____8OaH0RxW7DjZKdIF6rvbHvvyFGCBQ0PTgpx20nA_wbLgAAAABqRzBEAiBwUFigORJDPK8ptnYPAntjV-RUn1jAuzphicQstwVv-QIgEbMC8FWXQ5Jve5DaAqKJsqoj3peK83iub_oOkmbiYg4BIQO5Ehn2t0oUG3hnK4cBnwCwMc33DcdJ8aSMWzRQ_wjZL_____-UG6M-eBeAun-EZp6EbVypvVJ3mXCQrN_fUDn-kwoEnQAAAABqRzBEAiAgFAtVTpQYTKplc9NuV7Ws7ZFYeNO8BCS4ozgWrgd2ogIgGTTcw98xQdcGWeWQhVfVm_vZorBIOYovQPQeK0Lg9t8BIQLPWPioVWvj1z4NMHBCkeirYOUalCa83wbSH0CREnGZvv____8CjM_wCAAAAAAZdqkUIJA8_yqzaj0NzhvYVEIBno5gETGIrIzP8AgAAAAAGXapFEaV7xTyleuEX9OejdlUlsz7RTr0iKwAAAAA&c=hre47vyMC78&n=XTN
```
- this transaction doesn't have valid inputs, and will cause an error
- mempool.space will redirect this to a testnet endpoint (because ends with `n=XTN`)