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  1. // Copyright 2017-2018 DERO Project. All rights reserved.
  2. // Use of this source code in any form is governed by RESEARCH license.
  3. // license can be found in the LICENSE file.
  4. // GPG: 0F39 E425 8C65 3947 702A 8234 08B2 0360 A03A 9DE8
  5. //
  6. //
  7. // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  8. // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  9. // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  10. // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  11. // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  12. // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  13. // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  14. // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  15. // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  16. package blockchain
  17. import "fmt"
  18. import "encoding/hex"
  19. //import log "github.com/sirupsen/logrus"
  20. import "github.com/deroproject/derosuite/crypto"
  21. import "github.com/deroproject/derosuite/globals"
  22. var mainnet_static_checkpoints = map[uint64]crypto.Hash{}
  23. var testnet_static_checkpoints = map[uint64]crypto.Hash{}
  24. // initialize the checkpoints only few manually
  25. // just in case we decide to skip adding blocklist in the future
  26. func init_static_checkpoints() {
  27. switch globals.Config.Name {
  28. case "mainnet":
  29. ADD_CHECKPOINT(mainnet_static_checkpoints, 1, "cea3eb82889a1d063aa6205011a27a108e727f2ac66721a46bec8b7ee9e83d7e")
  30. ADD_CHECKPOINT(mainnet_static_checkpoints, 10, "a8feb533ad2ad021f356b964957f4880445f89d6c6658a9407d63ce5144fe8ea")
  31. ADD_CHECKPOINT(mainnet_static_checkpoints, 100, "462ef1347bd00511ad6e7be463cba4d44a69dbf8b7d1d478ff1fd68507dfc9e2")
  32. logger.Debugf("Added %d static checkpoints to mainnet", len(mainnet_static_checkpoints))
  33. case "testnet":
  34. logger.Debugf("Added %d static checkpoints to testnet", len(testnet_static_checkpoints))
  35. default:
  36. panic(fmt.Sprintf("Unknown Network \"%s\"", globals.Config.Name))
  37. }
  38. }
  39. // add a checkpoint to specific network
  40. func ADD_CHECKPOINT(x map[uint64]crypto.Hash, Height uint64, hash_hex string) {
  41. var hash crypto.Hash
  42. hash_raw, err := hex.DecodeString(hash_hex)
  43. if err != nil {
  44. panic(fmt.Sprintf("Cannot hex decode checkpint hash \"%s\"", hash_hex))
  45. }
  46. if len(hash_raw) != 32 {
  47. panic(fmt.Sprintf(" hash not 32 byte size Cannot hex decode checkpint hash \"%s\"", hash_hex))
  48. }
  49. copy(hash[:], hash_raw)
  50. x[Height] = hash
  51. }
  52. // verify whether the hash at the specific height matches
  53. func IsCheckPointKnown_Static(actual_hash crypto.Hash, height uint64) (result bool) {
  54. switch globals.Config.Name {
  55. case "mainnet":
  56. if expected_hash, ok := mainnet_static_checkpoints[height]; ok {
  57. if actual_hash == expected_hash {
  58. result = true
  59. return
  60. }
  61. }
  62. case "testnet":
  63. if expected_hash, ok := testnet_static_checkpoints[height]; ok {
  64. if actual_hash == expected_hash {
  65. result = true
  66. return
  67. }
  68. }
  69. default:
  70. panic(fmt.Sprintf("Unknown Network \"%s\"", globals.Config.Name))
  71. }
  72. return
  73. }