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header.go
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/
header.go
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package module
import (
"log"
clienttypes "github.com/cosmos/ibc-go/v8/modules/core/02-client/types"
"github.com/cosmos/ibc-go/v8/modules/core/exported"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/rlp"
"github.com/hyperledger-labs/yui-relayer/core"
)
var _ core.Header = (*Header)(nil)
func (Header) ClientType() string {
return QBFT_CLIENT_TYPE
}
func (h *Header) GetHeight() exported.Height {
ethHeader, err := h.decodeEthHeader()
if err != nil {
log.Panicf("invalid header: %v", h)
}
return ethHeightToPB(ethHeader.Number.Uint64())
}
func (h *Header) ValidateBasic() error {
if _, err := h.decodeEthHeader(); err != nil {
return err
}
if _, err := h.decodeAccountProof(); err != nil {
return err
}
return nil
}
func (h *Header) decodeEthHeader() (*types.Header, error) {
var ethHeader types.Header
if err := rlp.DecodeBytes(h.BesuHeaderRlp, ðHeader); err != nil {
return nil, err
}
return ðHeader, nil
}
func (h *Header) decodeAccountProof() ([][]byte, error) {
var decodedProof [][][]byte
if err := rlp.DecodeBytes(h.AccountStateProof, &decodedProof); err != nil {
return nil, err
}
var accountProof [][]byte
for i := range decodedProof {
b, err := rlp.EncodeToBytes(decodedProof[i])
if err != nil {
return nil, err
}
accountProof = append(accountProof, b)
}
return accountProof, nil
}
func ethHeightToPB(height uint64) clienttypes.Height {
return clienttypes.NewHeight(0, uint64(height))
}