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les/catalyst/api: add support for ExchangeTransitionConfigurationV1 #25752

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Merged
merged 1 commit into from
Sep 15, 2022
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les/catalyst/api: add support for ExchangeTransitionConfigurationV1 #25752

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29 changes: 29 additions & 0 deletions les/catalyst/api.go
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ import (
"fmt"

"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/beacon"
"github.com/ethereum/go-ethereum/les"
"github.com/ethereum/go-ethereum/log"
Expand Down Expand Up @@ -189,3 +190,31 @@ func (api *ConsensusAPI) setCanonical(newHead common.Hash) error {
}
return nil
}

// ExchangeTransitionConfigurationV1 checks the given configuration against
// the configuration of the node.
func (api *ConsensusAPI) ExchangeTransitionConfigurationV1(config beacon.TransitionConfigurationV1) (*beacon.TransitionConfigurationV1, error) {
log.Trace("Engine API request received", "method", "ExchangeTransitionConfiguration", "ttd", config.TerminalTotalDifficulty)
if config.TerminalTotalDifficulty == nil {
return nil, errors.New("invalid terminal total difficulty")
}

ttd := api.les.BlockChain().Config().TerminalTotalDifficulty
if ttd == nil || ttd.Cmp(config.TerminalTotalDifficulty.ToInt()) != 0 {
log.Warn("Invalid TTD configured", "geth", ttd, "beacon", config.TerminalTotalDifficulty)
return nil, fmt.Errorf("invalid ttd: execution %v consensus %v", ttd, config.TerminalTotalDifficulty)
}

if config.TerminalBlockHash != (common.Hash{}) {
if hash := api.les.BlockChain().GetCanonicalHash(uint64(config.TerminalBlockNumber)); hash == config.TerminalBlockHash {
return &beacon.TransitionConfigurationV1{
TerminalTotalDifficulty: (*hexutil.Big)(ttd),
TerminalBlockHash: config.TerminalBlockHash,
TerminalBlockNumber: config.TerminalBlockNumber,
}, nil
}
return nil, fmt.Errorf("invalid terminal block hash")
}

return &beacon.TransitionConfigurationV1{TerminalTotalDifficulty: (*hexutil.Big)(ttd)}, nil
}