mirror of
https://github.com/kaspanet/kaspad.git
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45edacfbfa
* Replace default hasher (Double-SHA256) with domain seperated blake2b * Replace all hashes with domain seperated blake2b * Update the genesis blocks * Replace OP_HASH256 with OP_BLAKE2B * Fix the merkle tree by appending zeros instead of duplicating the hash when there is 1 branch left * Update tests * Add a payloadHash function * Update gitignore to ignore binaries * Fix a bug in the blake2b opcode
49 lines
1.6 KiB
Go
49 lines
1.6 KiB
Go
package consensushashing
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import (
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"io"
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"github.com/kaspanet/kaspad/domain/consensus/utils/serialization"
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"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"
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"github.com/kaspanet/kaspad/domain/consensus/utils/hashes"
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"github.com/pkg/errors"
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)
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// BlockHash returns the given block's hash
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func BlockHash(block *externalapi.DomainBlock) *externalapi.DomainHash {
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return HeaderHash(block.Header)
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}
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// HeaderHash returns the given header's hash
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func HeaderHash(header *externalapi.DomainBlockHeader) *externalapi.DomainHash {
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// Encode the header and hash everything prior to the number of
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// transactions.
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writer := hashes.NewBlockHashWriter()
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err := serializeHeader(writer, header)
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if err != nil {
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// It seems like this could only happen if the writer returned an error.
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// and this writer should never return an error (no allocations or possible failures)
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// the only non-writer error path here is unknown types in `WriteElement`
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panic(errors.Wrap(err, "this should never happen. Hash digest should never return an error"))
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}
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return writer.Finalize()
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}
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func serializeHeader(w io.Writer, header *externalapi.DomainBlockHeader) error {
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timestamp := header.TimeInMilliseconds
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numParents := len(header.ParentHashes)
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if err := serialization.WriteElements(w, header.Version, uint64(numParents)); err != nil {
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return err
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}
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for _, hash := range header.ParentHashes {
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if err := serialization.WriteElement(w, hash); err != nil {
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return err
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}
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}
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return serialization.WriteElements(w, &header.HashMerkleRoot, &header.AcceptedIDMerkleRoot, &header.UTXOCommitment, timestamp,
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header.Bits, header.Nonce)
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}
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