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eth: add debug_syncTarget API #32126

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eth: add debug_syncTarget API #32126

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23 changes: 23 additions & 0 deletions eth/api_debug.go
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@ import (
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth/ethconfig"
"github.com/ethereum/go-ethereum/internal/ethapi"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/rlp"
Expand Down Expand Up @@ -443,3 +444,25 @@ func (api *DebugAPI) GetTrieFlushInterval() (string, error) {
}
return api.eth.blockchain.GetTrieFlushInterval().String(), nil
}

// SyncTarget sets the sync target for the downloader to a specific block hash.
func (api *DebugAPI) SyncTarget(target common.Hash) error {
if header := api.eth.BlockChain().GetHeaderByHash(target); header != nil {
return errors.New("sync target is already known in the chain")
}

dl := api.eth.Downloader()
header, err := dl.GetHeader(target)
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I think we want to retry a bit if this fails.

if err != nil {
return fmt.Errorf("failed to retrieve header for target %s: %w", target, err)
}

// Trigger beacon sync with the new target
err = dl.BeaconSync(ethconfig.FullSync, header, header)
if err != nil {
return fmt.Errorf("failed to start beacon sync to target %s: %w", target, err)
}

log.Info("BeaconSync set target to", "target", target, "number", header.Number)
return nil
}
5 changes: 5 additions & 0 deletions internal/web3ext/web3ext.go
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Original file line number Diff line number Diff line change
Expand Up @@ -217,6 +217,11 @@ web3._extend({
call: 'debug_setHead',
params: 1
}),
new web3._extend.Method({
name: 'syncTarget',
call: 'debug_syncTarget',
params: 1
}),
new web3._extend.Method({
name: 'seedHash',
call: 'debug_seedHash',
Expand Down