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46 lines
854 B
Go
46 lines
854 B
Go
package util
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import (
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"bytes"
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"encoding/binary"
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"encoding/hex"
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"fmt"
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)
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// Uint256 ...
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type Uint256 [32]uint8
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// Uint256FromBytes return an Uint256 from a byte slice.
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func Uint256FromBytes(b []byte) Uint256 {
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if len(b) != 32 {
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err := fmt.Sprintf("%d does not match the size of Uint256 (32 bytes)", len(b))
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panic(err)
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}
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var val [32]uint8
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for i := 0; i < 32; i++ {
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val[i] = b[i]
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}
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return Uint256(val)
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}
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// UnmarshalBinary implements the Binary Unmarshaler interface.
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func (u *Uint256) UnmarshalBinary(b []byte) error {
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r := bytes.NewReader(b)
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binary.Read(r, binary.LittleEndian, u)
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return nil
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}
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// ToSlice return a byte slice of u.
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func (u Uint256) ToSlice() []byte {
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b := make([]byte, 32)
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for i := 0; i < 32; i++ {
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b[i] = byte(u[i])
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}
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return b
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}
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func (u Uint256) String() string {
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return hex.EncodeToString(u.ToSlice())
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}
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