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core: set empty BlockAccessListHash on Amsterdam genesis

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When Amsterdam is active at genesis, toBlockWithRoot set SlotNumber on
the header but left BlockAccessListHash nil. Because both are rlp
optional fields on Header, and BlockAccessListHash precedes SlotNumber
in the encoded order, RLP writes an empty string (0x80) placeholder in
the BAL hash slot. Decoding such a header then fails with
"rlp: input string too short for common.Hash, decoding into
(types.Header).BlockAccessListHash", preventing the node from loading
its own freshly written genesis.

Default BlockAccessListHash to the empty-BAL hash (keccak256(0xc0)) on
the same fork gate so the optional chain stays consistent and genesis
headers round-trip through RLP.
This commit is contained in:
Barnabas Busa 2026-04-20 22:45:09 +02:00
parent 23a6adbcee
commit 2e638e607c
No known key found for this signature in database
GPG key ID: D7AF98F214C59E4E
2 changed files with 7 additions and 0 deletions
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3
core/genesis.go
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@ -557,6 +557,9 @@ func (g *Genesis) toBlockWithRoot(root common.Hash) *types.Block {
if head.SlotNumber == nil { if head.SlotNumber == nil {
head.SlotNumber = new(uint64) head.SlotNumber = new(uint64)
} }
if head.BlockAccessListHash == nil {
head.BlockAccessListHash = &types.EmptyBlockAccessListHash
}
} }
} }
return types.NewBlock(head, &types.Body{Withdrawals: withdrawals}, nil, trie.NewStackTrie(nil)) return types.NewBlock(head, &types.Body{Withdrawals: withdrawals}, nil, trie.NewStackTrie(nil))

4
core/types/hashes.go
View file

@ -43,6 +43,10 @@ var (
// EmptyRequestsHash is the known hash of an empty request set, sha256(""). // EmptyRequestsHash is the known hash of an empty request set, sha256("").
EmptyRequestsHash = common.HexToHash("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855") EmptyRequestsHash = common.HexToHash("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
// EmptyBlockAccessListHash is the known hash of an empty block access list,
// keccak256(rlp(empty list)) = keccak256(0xc0).
EmptyBlockAccessListHash = common.HexToHash("1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347")
// EmptyVerkleHash is the known hash of an empty verkle trie. // EmptyVerkleHash is the known hash of an empty verkle trie.
EmptyVerkleHash = common.Hash{} EmptyVerkleHash = common.Hash{}