| 152 | } |
| 153 | |
| 154 | func sign(args []string) { |
| 155 | fs := flag.NewFlagSet("sign", flag.PanicOnError) |
| 156 | prevHex := fs.String("prev", "", "previous block header (hex)") |
| 157 | err := fs.Parse(args) |
| 158 | must(err) |
| 159 | |
| 160 | prevBytes, err := hex.DecodeString(*prevHex) |
| 161 | must(err) |
| 162 | |
| 163 | var prev bc.BlockHeader |
| 164 | err = proto.Unmarshal(prevBytes, &prev) |
| 165 | must(err) |
| 166 | |
| 167 | blockBytes, err := ioutil.ReadAll(os.Stdin) |
| 168 | must(err) |
| 169 | |
| 170 | block := new(bc.Block) |
| 171 | err = block.FromBytes(blockBytes) |
| 172 | must(err) |
| 173 | |
| 174 | hash := block.Hash().Bytes() |
| 175 | |
| 176 | block, err = bc.SignBlock(block.UnsignedBlock, &prev, func(idx int) (interface{}, error) { |
| 177 | if arg := fs.Arg(idx); arg != "" { |
| 178 | prv, err := hex.DecodeString(arg) |
| 179 | must(err) |
| 180 | return ed25519.Sign(prv, hash), nil |
| 181 | } |
| 182 | return nil, nil |
| 183 | }) |
| 184 | must(err) |
| 185 | |
| 186 | blockBytes, err = block.Bytes() |
| 187 | must(err) |
| 188 | |
| 189 | os.Stdout.Write(blockBytes) |
| 190 | } |
| 191 | |
| 192 | func validate(args []string) { |
| 193 | fs := flag.NewFlagSet("validate", flag.PanicOnError) |