Create a new state from a given trie.

startKey is the concatenation of address and incarnation (BigEndian 8 byte).

FirstContractIncarnation - first incarnation for contract accounts.

NonContractIncarnation incarnation for non contracts.

SystemAddress - sender address for internal state updates.

BalanceIncrease represents the increase of balance of an account that did not require reading the account first.

ChangeSetWriter is a mock StateWriter that accumulates changes in-memory into ChangeSets.

IntraBlockState is responsible for caching and managing state changes that occur during block's execution.

State at the beginning of blockNr.

PlainStateReader reads data from so called "plain state".