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secretkey.go
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secretkey.go
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package ergo
/*
#include "ergo.h"
*/
import "C"
import (
"errors"
"iter"
"runtime"
"unsafe"
)
// SecretKey represents secret key for the prover
type SecretKey interface {
// Address returns address of the SecretKey
Address() Address
// Bytes returns SecretKey encoded to bytes
Bytes() []byte
pointer() C.SecretKeyPtr
}
type secretKey struct {
p C.SecretKeyPtr
}
func newSecretKey(s *secretKey) SecretKey {
runtime.SetFinalizer(s, finalizeSecretKey)
return s
}
// NewSecretKey generates new random SecretKey
func NewSecretKey() SecretKey {
var p C.SecretKeyPtr
C.ergo_lib_secret_key_generate_random(&p)
s := &secretKey{p: p}
return newSecretKey(s)
}
// NewSecretKeyFromBytes parses dlog secret key from bytes (SEC-1-encoded scalar)
// provided secret key bytes must be of length 32
func NewSecretKeyFromBytes(bytes []byte) (SecretKey, error) {
if len(bytes) != 32 {
return nil, errors.New("secret key size must be 32 bytes")
}
byteData := C.CBytes(bytes)
defer C.free(unsafe.Pointer(byteData))
var p C.SecretKeyPtr
errPtr := C.ergo_lib_secret_key_from_bytes((*C.uchar)(byteData), &p)
err := newError(errPtr)
if err.isError() {
return nil, err.error()
}
s := &secretKey{p: p}
return newSecretKey(s), nil
}
func (s *secretKey) Address() Address {
var p C.AddressPtr
C.ergo_lib_secret_key_get_address(s.p, &p)
a := &address{p}
return newAddress(a)
}
func (s *secretKey) Bytes() []byte {
bytes := C.malloc(C.uintptr_t(32))
C.ergo_lib_secret_key_to_bytes(s.p, (*C.uint8_t)(bytes))
defer C.free(unsafe.Pointer(bytes))
result := C.GoBytes(bytes, C.int(32))
return result
}
func (s *secretKey) pointer() C.SecretKeyPtr {
return s.p
}
func finalizeSecretKey(s *secretKey) {
C.ergo_lib_secret_key_delete(s.p)
}
// SecretKeys an ordered collection of SecretKey
type SecretKeys interface {
// Len returns the length of the collection
Len() int
// Get returns the SecretKey at the provided index if it exists
Get(index int) (SecretKey, error)
// Add adds provided SecretKey to the end of the collection
Add(secretKey SecretKey)
// All returns an iterator over all SecretKey inside the collection
All() iter.Seq2[int, SecretKey]
pointer() C.SecretKeysPtr
}
type secretKeys struct {
p C.SecretKeysPtr
}
func newSecretKeys(s *secretKeys) SecretKeys {
runtime.SetFinalizer(s, finalizeSecretKeys)
return s
}
// NewSecretKeys creates an empty SecretKeys collection
func NewSecretKeys() SecretKeys {
var p C.SecretKeysPtr
C.ergo_lib_secret_keys_new(&p)
s := &secretKeys{p: p}
return newSecretKeys(s)
}
func (s *secretKeys) Len() int {
res := C.ergo_lib_secret_keys_len(s.p)
return int(res)
}
func (s *secretKeys) Get(index int) (SecretKey, error) {
var p C.SecretKeyPtr
res := C.ergo_lib_secret_keys_get(s.p, C.uintptr_t(index), &p)
err := newError(res.error)
if err.isError() {
return nil, err.error()
}
if res.is_some {
sk := &secretKey{p: p}
return newSecretKey(sk), nil
}
return nil, nil
}
func (s *secretKeys) Add(secretKey SecretKey) {
C.ergo_lib_secret_keys_add(secretKey.pointer(), s.p)
}
func (s *secretKeys) All() iter.Seq2[int, SecretKey] {
return func(yield func(int, SecretKey) bool) {
for i := 0; i < s.Len(); i++ {
tk, err := s.Get(i)
if err != nil {
return
}
if !yield(i, tk) {
return
}
}
}
}
func (s *secretKeys) pointer() C.SecretKeysPtr {
return s.p
}
func finalizeSecretKeys(s *secretKeys) {
C.ergo_lib_secret_keys_delete(s.p)
}