First version of tests

src/computation.nim

@@ -214,7 +214,12 @@ method getGasRemaining*(c: BaseComputation): Int256 =
 # Context Manager API
 #
 
-template inBaseComputation*(c: untyped, handler: untyped): untyped =
+template inComputation*(c: untyped, handler: untyped): untyped =
+  # use similarly to the python manager
+  #
+  # inComputation(computation):
+  #   stuff
+
   `c`.logger.debug(
     "COMPUTATION STARTING: gas: $1 | from: $2 | to: $3 | value: $4 | depth: $5 | static: $6" % [
       $`c`.msg.gas,

src/constants.nim

@@ -146,10 +146,10 @@ const
   GASEXPBYTE = 10
   GAS_MEMORY* = 3.Int256
   GAS_TX_CREATE* = 32000.Int256
-  GASTXDATAZERO = 4
-  GASTXDATANONZERO = 68
-  GASTX = 21000
-  GASLOG = 375
+  GAS_TX_DATA_ZERO* = 4.Int256
+  GAS_TX_DATA_NON_ZERO* = 68.Int256
+  GAS_TX* = 21000.Int256
+  GAS_LOG* = 375.Int256
   GASLOGDATA = 8
   GASLOGTOPIC = 375
   GASSHA3 = 30
@@ -191,8 +191,8 @@ const
   SECPK1Gy = 0
   SECPK1G = (SECPK1Gx, SECPK1Gy)
   EMPTYUNCLEHASH = cstring"\\x1d\\xccM\\xe8\\xde\\xc7]z\\xab\\x85\\xb5g\\xb6\\xcc\\xd4\\x1a\\xd3\\x12E\\x1b\\x94\\x8at\\x13\\xf0\\xa1B\\xfd@\\xd4\\x93G"
-  GENESISBLOCKNUMBER = 0
-  GENESISDIFFICULTY = 131072
+  GENESIS_BLOCK_NUMBER* = 0.Int256
+  GENESIS_DIFFICULTY* = 131072.Int256
   GENESISGASLIMIT = 3141592
   GENESISPARENTHASH = ZEROHASH32
   GENESISCOINBASE = ZEROADDRESS

src/utils/address.nim

@@ -0,0 +1,3 @@
+proc toCanonicalAddress*(address: cstring): cstring =
+  # TODO
+  address

tests/helpers.nim

@@ -0,0 +1,54 @@
+import
+  .. / src / [utils / hexadecimal, utils / address, chain, constants, db, db / chain, vm / forks / frontier]
+
+# This block is a child of the genesis defined in the chain fixture above and contains a single tx
+# that transfers 10 wei from 0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b to
+# 0x095e7baea6a6c7c4c2dfeb977efac326af552d87.
+var validBlockRlp = decodeHex(
+    "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")  # noqa: E501
+
+type
+  PrivateKey = object # TODO
+    publicKey*: cstring
+
+proc testChain*: Chain =
+  # Return a Chain object containing just the genesis block.
+  #
+  # This Chain does not perform any validation when importing new blocks.
+  #
+  # The Chain's state includes one funded account and a private key for it, which can be found in
+  # the funded_address and private_keys variables in the chain itself.
+  # Disable block validation so that we don't need to construct finalized blocks.
+ 
+  var klass = configureChain(
+    "TestChainWithoutBlockValidation",
+    constants.GENESIS_BLOCK_NUMBER,
+    FrontierVM,
+    importBlock=false,
+    validateBlock=false)
+
+  var privateKey = PrivateKey(publicKey: cstring"0x45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8") # TODO
+  var fundedAddress = privateKey.publicKey.toCanonicalAddress()
+  var initialBalance = 100_000_000
+  var genesisParams = GenesisParams(
+    blockNumber: constants.GENESIS_BLOCK_NUMBER,
+    difficulty: constants.GENESIS_DIFFICULTY,
+    gasLimit: constants.GENESIS_GAS_LIMIT,
+    parentHash: constants.GENESIS_PARENT_HASH,
+    coinbase: constants.GENESIS_COINBASE,
+    nonce: constants.GENESIS_NONCE,
+    mixHash: constants.GENESIS_MIX_HASH,
+    extraData: constants.GENESIS_EXTRA_DATA,
+    timestamp: 1501851927,
+    stateRoot: decodeHex("0x9d354f9b5ba851a35eced279ef377111387197581429cfcc7f744ef89a30b5d4"))
+
+  var genesisState = GenesisState(
+    fundedAddress: FundedAddress(
+      balance: initialBalance,
+      nonce: 0,
+      code: cstring""))
+
+  result = klass.fromGenesis(newBaseChainDB(getDbBackend()), genesisParams, genesisState)
+  result.fundedAddress = fundedAddress
+  result.fundedAddressInitialBalance = initialBalance
+  result.fundedAddressPrivateKey = privateKey

tests/vm_test.nim

@@ -0,0 +1,28 @@
+import
+  unittest,
+  helpers, .. / src / [db / backends / memory, db / chain, constants, utils / hexadecimal]
+
+suite "vm":
+  test "apply no validation":
+    var
+      chain = testChain()
+      vm = chain.getVM()
+      txIdx = len(vm.`block`.transactions)
+      recipient = decodeHex("0xa94f5374fce5edbc8e2a8697c15331677e6ebf0c")
+      amount = 100.Int256
+    
+    var from = chain.fundedAddress
+    var tx = newTransaction(vm, from, recipient, amount, chain.fundedAddressPrivateKey)
+    var (computation, _) = vm.applyTransaction(tx)
+    var accessLogs = computation.vmState.accessLogs
+    
+    check(not computation.isError)
+
+    var txGas = tx.gasPrice * constants.GAS_TX
+    inDb(vm.state.stateDb(readOnly=true)):
+      check(db.getBalance(from) == chain.fundedAddressInitialBalance - amount - txGas)
+      check(db.getBalance(recipient) == amount)
+    var b = vm.`block`
+    check(b.transactions[txIdx] == tx)
+    check(b.header.gasUsed == constants.GAS_TX)
+