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https://github.com/lightningnetwork/lnd.git
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492f8b6999
In this commit, we add a check during normal node construction to see if the backend node supports Taproot. If it doesn't, then we want to shutdown and force the user to take note. To check if the node supports Taproot, we'll first try the normal getblockchaininfo call. If this works, cool, then we can rely on the value. If it doesn't, then we'll fall back to the getdeploymentinfo call which was added in a recent version of bitcoind [1]. Newer versions of bitcoind might also have this call, and the getblockchaininfo call, but not actually populate the softforks field [2]. In this case, we'll fall back, and we also account for the case when the getblockchaininfo RPC is removed all together. [1]: https://github.com/bitcoin/bitcoin/pull/23508 [2]: https://github.com/bitcoin/bitcoin/pull/25114 Fixes #6773
54 lines
1.5 KiB
Go
54 lines
1.5 KiB
Go
package chainreg
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import (
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"encoding/json"
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"github.com/btcsuite/btcd/rpcclient"
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)
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// backendSupportsTaproot returns true if the backend understands the taproot
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// soft fork.
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func backendSupportsTaproot(rpc *rpcclient.Client) bool {
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// First, we'll try to access the normal getblockchaininfo call.
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chainInfo, err := rpc.GetBlockChainInfo()
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if err == nil {
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// If this call worked, then we'll check that the taproot
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// deployment is defined.
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if chainInfo.SoftForks != nil {
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_, ok := chainInfo.SoftForks.Bip9SoftForks["taproot"]
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if ok {
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return ok
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}
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}
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}
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// The user might be running a newer version of bitcoind that doesn't
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// implement the getblockchaininfo call any longer, so we'll fall back
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// here.
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//
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// Alternatively, the fork wasn't specified, but the user might be
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// running a newer version of bitcoind that still has the
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// getblockchaininfo call, but doesn't populate the data, so we'll hit
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// the new getdeploymentinfo call.
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resp, err := rpc.RawRequest("getdeploymentinfo", nil)
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if err != nil {
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log.Warnf("unable to make getdeploymentinfo request: %v", err)
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return false
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}
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info := struct {
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Deployments map[string]struct {
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Type string `json:"type"`
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Active bool `json:"active"`
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Height int32 `json:"height"`
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} `json:"deployments"`
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}{}
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if err := json.Unmarshal(resp, &info); err != nil {
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log.Warnf("unable to decode getdeploymentinfo resp: %v", err)
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return false
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}
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_, ok := info.Deployments["taproot"]
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return ok
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}
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