crypto

type Opts struct {
	// The datastore path of the signer.
	Path string
}

type Signer interface {
	// SetKey is used to set a private key for a given currency id. It will return error if there is
	// an existing key already associated with the given currency id.
	//
	// @input - context, currency id, key type, private key.
	//
	// @output - error.
	SetKey(ctx context.Context, currencyID byte, keyType byte, prv []byte) error

	// GetAddr is used to obtain the key type and the address derived from the private key associated
	// with the given currency id.
	//
	// @input - context, currency id.
	//
	// @output - key type, address, error.
	GetAddr(ctx context.Context, currencyID byte) (byte, string, error)

	// Sign is used to sign given data with the private key associated with given currency id.
	//
	// @input - context, currency id, data.
	//
	// @output - signature type, signature, error.
	Sign(ctx context.Context, currencyID byte, data []byte) (byte, []byte, error)

	// RetireKey is used to retire a key for a given currency id. If within timeout the key is touched
	// it will return error.
	//
	// @input - context, currency id, timeout.
	//
	// @output - error channel out.
	RetireKey(ctx context.Context, currencyID byte, timeout time.Duration) <-chan error

	// StopRetire is used to stop retiring a key for a given currency id.
	//
	// @input - context, currency id.
	//
	// @output - error.
	StopRetire(ctx context.Context, currencyID byte) error

	// ListCurrencyIDs lists all currencies.
	//
	// @input - context.
	//
	// @output - currency chan out, error chan out.
	ListCurrencyIDs(ctx context.Context) (<-chan byte, <-chan error)
}

type SignerImpl struct {
	// contains filtered or unexported fields
}