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aeb4b96560
* [NOD-1451] Implement block validator * [NOD-1451] Implement block validator * [NOD-1451] Fix merge errors * [NOD-1451] Implement block validator * [NOD-1451] Implement checkTransactionInIsolation * [NOD-1451] Copy txscript to validator * [NOD-1451] Change txscript to new design * [NOD-1451] Add checkTransactionInContext * [NOD-1451] Add checkBlockSize * [NOD-1451] Add error handling * [NOD-1451] Implement checkTransactionInContext * [NOD-1451] Add checkTransactionMass placeholder * [NOD-1451] Finish validators * [NOD-1451] Add comments and stringers * [NOD-1451] Return model.TransactionValidator interface * [NOD-1451] Premake rule errors for each "code" * [NOD-1451] Populate transaction mass * [NOD-1451] Renmae functions * [NOD-1451] Always use skipPow=false * [NOD-1451] Renames * [NOD-1451] Remove redundant types from WriteElement * [NOD-1451] Fix error message * [NOD-1451] Add checkTransactionPayload * [NOD-1451] Add ValidateProofOfWorkAndDifficulty to block validator interface * [NOD-1451] Move stringers to model * [NOD-1451] Fix error message
43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
package hashes
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import (
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"crypto/sha256"
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"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"
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"github.com/pkg/errors"
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"hash"
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)
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// HashWriter is used to incrementally hash data without concatenating all of the data to a single buffer
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// it exposes an io.Writer api and a Finalize function to get the resulting hash.
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// The used hash function is double-sha256.
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type HashWriter struct {
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inner hash.Hash
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}
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// NewHashWriter Returns a new HashWriter
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func NewHashWriter() *HashWriter {
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return &HashWriter{sha256.New()}
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}
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// Write will always return (len(p), nil)
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func (h *HashWriter) Write(p []byte) (n int, err error) {
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return h.inner.Write(p)
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}
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// Finalize returns the resulting double hash
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func (h *HashWriter) Finalize() externalapi.DomainHash {
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firstHashInTheSum := h.inner.Sum(nil)
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return sha256.Sum256(firstHashInTheSum)
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}
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// HashData hashes the given byte slice
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func HashData(data []byte) externalapi.DomainHash {
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w := NewHashWriter()
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_, err := w.Write(data)
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if err != nil {
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panic(errors.Wrap(err, "this should never happen. SHA256's digest should never return an error"))
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}
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return w.Finalize()
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}
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