95 lines
2.3 KiB
Go
95 lines
2.3 KiB
Go
package common
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import "math/big"
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const (
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hashLength = 32
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addressLength = 20
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)
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type (
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Hash [hashLength]byte
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Address [addressLength]byte
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)
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var (
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zeroHash Hash
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zeroAddress Address
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)
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func BytesToHash(b []byte) Hash {
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var h Hash
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h.SetBytes(b)
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return h
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}
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func StringToHash(s string) Hash { return BytesToHash([]byte(s)) }
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func BigToHash(b *big.Int) Hash { return BytesToHash(b.Bytes()) }
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func HexToHash(s string) Hash { return BytesToHash(FromHex(s)) }
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// Don't use the default 'String' method in case we want to overwrite
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// Get the string representation of the underlying hash
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func (h Hash) Str() string { return string(h[:]) }
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func (h Hash) Bytes() []byte { return h[:] }
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func (h Hash) Big() *big.Int { return Bytes2Big(h[:]) }
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// Sets the hash to the value of b. If b is larger than len(h) it will panic
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func (h *Hash) SetBytes(b []byte) {
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if len(b) > len(h) {
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b = b[len(b)-hashLength:]
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}
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// reverse loop
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for i := len(b) - 1; i >= 0; i-- {
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h[i] = b[i]
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}
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}
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// Set string `s` to h. If s is larger than len(h) it will panic
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func (h *Hash) SetString(s string) { h.SetBytes([]byte(s)) }
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// Sets h to other
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func (h *Hash) Set(other Hash) {
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for i, v := range other {
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h[i] = v
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}
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}
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/////////// Address
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func BytesToAddress(b []byte) Address {
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var a Address
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a.SetBytes(b)
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return a
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}
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func StringToAddress(s string) Address { return BytesToAddress([]byte(s)) }
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func BigToAddress(b *big.Int) Address { return BytesToAddress(b.Bytes()) }
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func HexToAddress(s string) Address { return BytesToAddress(FromHex(s)) }
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// Get the string representation of the underlying address
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func (a Address) Str() string { return string(a[:]) }
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func (a Address) Bytes() []byte { return a[:] }
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func (a Address) Big() *big.Int { return Bytes2Big(a[:]) }
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func (a Address) Hash() Hash { return BytesToHash(a[:]) }
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// Sets the address to the value of b. If b is larger than len(a) it will panic
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func (a *Address) SetBytes(b []byte) {
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if len(b) > len(a) {
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b = b[len(b)-addressLength:]
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}
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// reverse loop
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for i := len(b) - 1; i >= 0; i-- {
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a[i] = b[i]
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}
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}
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// Set string `s` to a. If s is larger than len(a) it will panic
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func (a *Address) SetString(s string) { a.SetBytes([]byte(s)) }
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// Sets a to other
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func (a *Address) Set(other Address) {
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for i, v := range other {
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a[i] = v
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}
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}
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