Unable to go get LND as a library

[burdiyan]

Background

I want to use LND as a library, embedded into another Go binary. With some recent updates of LND, go get fails with errors related to etcd.

Your environment

• version of lnd: v0.13.1-beta
• which operating system (uname -a on *Nix): Darwin MacBook-Pro-2.local 19.6.0 Darwin Kernel Version 19.6.0: Thu May 6 00:48:39 PDT 2021; root:xnu-6153.141.33~1/RELEASE_X86_64 x86_64
• version of btcd, bitcoind, or other backend: N/A.
• any other relevant environment details: Go 1.16.3.

Steps to reproduce

1. mkdir lnd-lib && cd lnd-lib.
2. go mod init lib.
3. go get github.com/lightningnetwork/lnd@v0.13.1-beta.

Expected behaviour

Library downloaded and ready to be imported.

Actual behaviour

go get: github.com/lightningnetwork/lnd@v0.12.1-beta-branch updating to
	github.com/lightningnetwork/lnd@v0.13.1-beta requires
	go.etcd.io/etcd@v3.4.14+incompatible: verifying go.mod: go.etcd.io/etcd@v3.4.14+incompatible/go.mod: reading https://sum.golang.org/lookup/go.etcd.io/etcd@v3.4.14+incompatible: 410 Gone
	server response: not found: go.etcd.io/etcd@v3.4.14+incompatible: invalid version: +incompatible suffix not allowed: module contains a go.mod file, so semantic import versioning is required`

[burdiyan]

Interestingly, if I clone LND repo into my own code, and then use replace directive in my go.mod to use this local version, everything works fine.

[guggero]

This is a bug in the etcd library we pulled in for lnd v0.13.1. There was something weird with the go module in that version. This has been fixed on master (and therefore will be fixed in the upcoming v0.14.0-beta).

For now, you can fix the problem by adding the following replace into your project's go.mod file:

// Fix incompatibility of etcd go.mod package.
// See https://github.com/etcd-io/etcd/issues/11154
replace go.etcd.io/etcd => go.etcd.io/etcd v0.5.0-alpha.5.0.20201125193152-8a03d2e9614b

[burdiyan]

Thanks, this helps