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15 lines
333 B
15 lines
333 B
package p2p
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import (
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"crypto/sha256"
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)
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// doubleSha256 calculates sha256(sha256(b)) and returns the resulting bytes.
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func doubleSha256(b []byte) []byte {
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hasher := sha256.New()
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hasher.Write(b) // nolint: errcheck, gas
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sum := hasher.Sum(nil)
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hasher.Reset()
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hasher.Write(sum) // nolint: errcheck, gas
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return hasher.Sum(nil)
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}
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