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LND 0.21 compatibility issue with the LND/LNC send wallet integration.
245 sats \ 5 comments \ @iguano 21 Sep lightning

Hi @k00b ,

I found what appears to be an LND 0.21 compatibility issue with the LND/LNC send wallet integration.

I'm running:

  • LND v0.21.3-beta
  • Lightning Terminal / LiT v0.17.5-alpha
  • LNC with a custom session

Your LND wallet configuration currently states:
must allow SendPaymentSync; TrackPaymentV2 and ChannelBalance optional

However, SendPaymentSync is no longer available in LND 0.21. The current payment RPC is:
/routerrpc.Router/SendPaymentV2

I created an LNC session allowing:

  • /routerrpc.Router/SendPaymentV2
  • /routerrpc.Router/TrackPaymentV2
  • /lnrpc.Lightning/ChannelBalance

When testing the wallet in Stacker News, I get:

Lightning Node Connect send failed: wrong permissions: missing permission: lnrpc.Lightning.SendPaymentSync

Could the LND/LNC wallet backend be updated to support routerrpc.Router.SendPaymentV2 for LND 0.21+, and the wallet configuration documentation/UI be updated accordingly?

I can test the updated implementation against my LND 0.21.3 node if useful.

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related posts
177 sats \ 3 replies \ @k00b 21 Sep

Yes, I recall seeing this in the 0.21 major release notes. I'll create an issue for it. Thanks!

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87 sats \ 0 replies \ @optimism 21 Sep

I have something for this on top of #3238

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2 sats \ 0 replies \ @iguano OP 21 Sep

Thanks keep trying to connect a wallet to send zaps :)

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2 sats \ 0 replies \ @iguano OP 21 Sep

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2 sats \ 0 replies \ @06bc1a977d 22 Sep

Good catch on the RPC shift. LND 0.21 moved payments to routerrpc and dropped SendPaymentSync entirely, so the wallet backend needs to call SendPaymentV2 with the right macaroon caveats.

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