Renamed `chain` => `core`

1 files changed, 141 insertions, 0 deletions

diff --git a/core/error.go b/core/error.go
new file mode 100644
index 000000000..11d8c1653
--- /dev/null
+++ b/core/error.go
@@ -0,0 +1,141 @@
+package core
+
+import (
+	"fmt"
+	"math/big"
+)
+
+// Parent error. In case a parent is unknown this error will be thrown
+// by the block manager
+type ParentErr struct {
+	Message string
+}
+
+func (err *ParentErr) Error() string {
+	return err.Message
+}
+
+func ParentError(hash []byte) error {
+	return &ParentErr{Message: fmt.Sprintf("Block's parent unkown %x", hash)}
+}
+
+func IsParentErr(err error) bool {
+	_, ok := err.(*ParentErr)
+
+	return ok
+}
+
+type UncleErr struct {
+	Message string
+}
+
+func (err *UncleErr) Error() string {
+	return err.Message
+}
+
+func UncleError(str string) error {
+	return &UncleErr{Message: str}
+}
+
+func IsUncleErr(err error) bool {
+	_, ok := err.(*UncleErr)
+
+	return ok
+}
+
+// Block validation error. If any validation fails, this error will be thrown
+type ValidationErr struct {
+	Message string
+}
+
+func (err *ValidationErr) Error() string {
+	return err.Message
+}
+
+func ValidationError(format string, v ...interface{}) *ValidationErr {
+	return &ValidationErr{Message: fmt.Sprintf(format, v...)}
+}
+
+func IsValidationErr(err error) bool {
+	_, ok := err.(*ValidationErr)
+
+	return ok
+}
+
+type GasLimitErr struct {
+	Message string
+	Is, Max *big.Int
+}
+
+func IsGasLimitErr(err error) bool {
+	_, ok := err.(*GasLimitErr)
+
+	return ok
+}
+func (err *GasLimitErr) Error() string {
+	return err.Message
+}
+func GasLimitError(is, max *big.Int) *GasLimitErr {
+	return &GasLimitErr{Message: fmt.Sprintf("GasLimit error. Max %s, transaction would take it to %s", max, is), Is: is, Max: max}
+}
+
+type NonceErr struct {
+	Message string
+	Is, Exp uint64
+}
+
+func (err *NonceErr) Error() string {
+	return err.Message
+}
+
+func NonceError(is, exp uint64) *NonceErr {
+	return &NonceErr{Message: fmt.Sprintf("Nonce err. Is %d, expected %d", is, exp), Is: is, Exp: exp}
+}
+
+func IsNonceErr(err error) bool {
+	_, ok := err.(*NonceErr)
+
+	return ok
+}
+
+type OutOfGasErr struct {
+	Message string
+}
+
+func OutOfGasError() *OutOfGasErr {
+	return &OutOfGasErr{Message: "Out of gas"}
+}
+func (self *OutOfGasErr) Error() string {
+	return self.Message
+}
+
+func IsOutOfGasErr(err error) bool {
+	_, ok := err.(*OutOfGasErr)
+
+	return ok
+}
+
+type TDError struct {
+	a, b *big.Int
+}
+
+func (self *TDError) Error() string {
+	return fmt.Sprintf("incoming chain has a lower or equal TD (%v <= %v)", self.a, self.b)
+}
+func IsTDError(e error) bool {
+	_, ok := e.(*TDError)
+	return ok
+}
+
+type KnownBlockError struct {
+	number *big.Int
+	hash   []byte
+}
+
+func (self *KnownBlockError) Error() string {
+	return fmt.Sprintf("block %v already known (%x)", self.number, self.hash[0:4])
+}
+func IsKnownBlockErr(e error) bool {
+	_, ok := e.(*KnownBlockError)
+	return ok
+}