28 lines
705 B
Go
28 lines
705 B
Go
package api
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import (
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"fmt"
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"github.com/ethereum/go-ethereum/crypto"
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)
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// RunAsync runs the specified function asynchronously.
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func RunAsync(f func() error) <-chan error {
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resp := make(chan error, 1)
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go func() {
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err := f()
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resp <- err
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close(resp)
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}()
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return resp
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}
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// HashMessage calculates the hash of a message to be safely signed by the keycard
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// The hash is calulcated as
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// keccak256("\x19Ethereum Signed Message:\n"${message length}${message}).
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// This gives context to the signed message and prevents signing of transactions.
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func HashMessage(data []byte) []byte {
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msg := fmt.Sprintf("\x19Ethereum Signed Message:\n%d%s", len(data), data)
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return crypto.Keccak256([]byte(msg))
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}
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