loadLastState loads the last known chain state from the database. This method assumes that the chain manager mutex is held.
()
| 327 | // loadLastState loads the last known chain state from the database. This method |
| 328 | // assumes that the chain manager mutex is held. |
| 329 | func (bc *BlockChain) loadLastState() error { |
| 330 | // Restore the last known head block |
| 331 | head := rawdb.ReadHeadBlockHash(bc.db) |
| 332 | if head == (common.Hash{}) { |
| 333 | // Corrupt or empty database, init from scratch |
| 334 | log.Warn("Empty database, resetting chain") |
| 335 | return bc.Reset() |
| 336 | } |
| 337 | // Make sure the entire head block is available |
| 338 | currentBlock := bc.GetBlockByHash(head) |
| 339 | if currentBlock == nil { |
| 340 | // Corrupt or empty database, init from scratch |
| 341 | log.Warn("Head block missing, resetting chain", "hash", head) |
| 342 | return bc.Reset() |
| 343 | } |
| 344 | // Make sure the state associated with the block is available |
| 345 | if _, err := state.New(currentBlock.StateRoot(), bc.stateCache); err != nil { |
| 346 | // Dangling block without a state associated, init from scratch |
| 347 | log.Warn("Head state missing, repairing chain", "number", currentBlock.Number(), "hash", currentBlock.Hash().Hex()) |
| 348 | if err := bc.repair(¤tBlock); err != nil { |
| 349 | return err |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | // Make sure the private state associated with the block is available |
| 354 | if _, err := state.New(GetPrivateStateRoot(bc.db, currentBlock.StateRoot()), bc.privateStateCache); err != nil { |
| 355 | log.Warn("Head private state missing, repairing chain", "number", currentBlock.Number(), "hash", currentBlock.Hash().Hex()) |
| 356 | // TODO: use repair instead. |
| 357 | return bc.Reset() |
| 358 | } |
| 359 | |
| 360 | // Everything seems to be fine, set as the head block |
| 361 | bc.currentBlock.Store(currentBlock) |
| 362 | |
| 363 | // Restore the last known head header |
| 364 | currentHeader := currentBlock.Header() |
| 365 | if head := rawdb.ReadHeadHeaderHash(bc.db); head != (common.Hash{}) { |
| 366 | if header := bc.GetHeaderByHash(head); header != nil { |
| 367 | currentHeader = header |
| 368 | } |
| 369 | } |
| 370 | bc.hc.SetCurrentHeader(currentHeader) |
| 371 | |
| 372 | // Restore the last known head fast block |
| 373 | bc.currentFastBlock.Store(currentBlock) |
| 374 | if head := rawdb.ReadHeadFastBlockHash(bc.db); head != (common.Hash{}) { |
| 375 | if block := bc.GetBlockByHash(head); block != nil { |
| 376 | bc.currentFastBlock.Store(block) |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | // Issue a status log for the user |
| 381 | currentFastBlock := bc.CurrentFastBlock() |
| 382 | |
| 383 | log.Info("Loaded most recent local header", "number", currentHeader.Number, "hash", currentHeader.Hash().Hex()) |
| 384 | log.Info("Loaded most recent local full block", "number", currentBlock.Number(), "hash", currentBlock.Hash().Hex()) |
| 385 | log.Info("Loaded most recent local fast block", "number", currentFastBlock.Number(), "hash", currentFastBlock.Hash().Hex()) |
| 386 |
no test coverage detected