public void Can_provide_a_latest_state_update_hash()
{
var stateUpdate = new StateUpdate();
var stateUpdateHashProvider = new StateUpdateHashProvider();
stateUpdateHashProvider.GetHash(stateUpdate, 1);
}
/*
* also need to test:
* BALANCE
* EXTCODECOPY
* CALLDATACOPY
* GASPRICE
* CREATE
*/
private static GethLikeTxTracer RunVirtualMachine(byte[] code)
{
var txTracer = new GethLikeTxTracer(GethTraceOptions.Default);
IDb stateDbDevice = new MemDb();
IDb codeDbDevice = new MemDb();
ISnapshotableDb stateDb = new StateDb(stateDbDevice);
ISnapshotableDb codeDb = new StateDb(codeDbDevice);
IStateProvider stateProvider = new StateProvider(stateDb, codeDb, LimboLogs.Instance);
IStorageProvider storageProvider = new StorageProvider(stateDb, stateProvider, LimboLogs.Instance);
IStateUpdateHashProvider stateUpdateHashProvider = new StateUpdateHashProvider();
ISpecProvider specProvider = new CatalystSpecProvider();
// these values will be set by the tx processor within the state update logic
var env = new ExecutionEnvironment();
env.Originator = Address.Zero; // tx sender
env.Sender = Address.Zero; // sender of this call for a given call depth
env.ExecutingAccount =
Address.Zero; // account in which context the code is executed, it may be different from the code source when invoking a lib
env.Value = 1
.Kat(); // sometimes the value is just a description of an upper level call to be used by a an invoke library method
env.TransferValue = 1.Kat(); // this is the actual value transferred from sender to recipient
env.GasPrice = 0; // conversion from gas units to FULs
env.InputData =
new byte[0]; // only needed for contracts requiring input (ensure that this is not limited to 60bytes)
env.CallDepth = 0; // zero when starting tx
var stateUpdate = new StateUpdate(); // Catalyst single state update context (all phases together)
stateUpdate.Difficulty =
1; // some metric describing the state update that is relevant for consensus
stateUpdate.Number = 1; // state update sequence number
stateUpdate.Timestamp = 1; // state update T0
stateUpdate.GasLimit = 1_000_000; // max gas units to be available for this tx inside the kvm
stateUpdate.GasBeneficiary = Address.Zero; // will get all the gas fees
stateUpdate.GasUsed =
0L; // zero if this is the first transaction in the update (accumulator over txs)
env.CurrentBlock = stateUpdate;
// this would be loaded by the tx processor from the recipient's code storage
var codeInfo = new CodeInfo(code);
env.CodeInfo = codeInfo;
env.CodeSource = Address.Zero;
// this would be set by the tx processor that understands the type of transaction
var vmState = new VmState(1_000_000L, env, ExecutionType.Transaction, false, true, false);
var virtualMachine = new KatVirtualMachine(stateProvider, storageProvider, stateUpdateHashProvider,
specProvider, LimboLogs.Instance);
virtualMachine.Run(vmState, txTracer);
return(txTracer);
}