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chainreg: accommodate buried taproot deployment in Bitcoin Core v31 #10683

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Merged
Roasbeef merged 2 commits into from
Apr 8, 2026
+16 −1
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chainreg: accommodate buried taproot deployment in Bitcoin Core v31 #10683

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f831476
chainreg: accommodate buried taproot deployment in Bitcoin Core v31
pinheadmz Mar 27, 2026
3963905
docs: update release notes
pinheadmz Apr 6, 2026
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12 changes: 11 additions & 1 deletion chainreg/taproot_check.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ package chainreg

import (
"encoding/json"
"slices"

"github.com/btcsuite/btcd/rpcclient"
)
Expand Down Expand Up @@ -48,6 +49,7 @@ func backendSupportsTaproot(rpc *rpcclient.Client) bool {
}

info := struct {
ScriptFlags []string `json:"script_flags"`
Deployments map[string]struct {
Type string `json:"type"`
Active bool `json:"active"`
Expand All @@ -59,6 +61,14 @@ func backendSupportsTaproot(rpc *rpcclient.Client) bool {
return false
}

// Before Bitcoin Core v31, taproot was still included as a BIP9
// deployment.
_, ok := info.Deployments["taproot"]
return ok

// Since v31, taproot is activated at genesis and no longer appears
// as a deployment. Also in v31, Bitcoin Core added a "script_flags"
// field to getdeploymentinfo which lists all the verification flags.
hasFlag := slices.Contains(info.ScriptFlags, "TAPROOT")

return ok || hasFlag
}
5 changes: 5 additions & 0 deletions docs/release-notes/release-notes-0.21.0.md
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Expand Up @@ -360,6 +360,10 @@

## Code Health

* [Update taproot detection](https://github.com/lightningnetwork/lnd/pull/10683)
to accommodate buried activation (and modified RPC `getdeploymentinfo`
response) beginning in Bitcoin Core v32.

## Tooling and Documentation

* [Added missing `lncli:` tags](https://github.com/lightningnetwork/lnd/pull/10658)
Expand All @@ -382,6 +386,7 @@
* Erick Cestari
* Gijs van Dam
* hieblmi
* Matthew Zipkin
* Mohamed Awnallah
* Nishant Bansal
* Pins
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