Merge pull request #201 from Bytom/v0.1

[bytom/vapor.git] / vendor / github.com / bytom / protocol / vm / context.go

diff --git a/vendor/github.com/bytom/protocol/vm/context.go b/vendor/github.com/bytom/protocol/vm/context.go
new file mode 100644 (file)
index 0000000..853e91c
--- /dev/null
+++ b/vendor/github.com/bytom/protocol/vm/context.go
@@ -0,0 +1,35 @@
+package vm
+
+// Context contains the execution context for the virtual machine.
+//
+// Most fields are pointers and are not required to be present in all
+// cases. A nil pointer means the value is absent in that context. If
+// an opcode executes that requires an absent field to be present, it
+// will return ErrContext.
+//
+// By convention, variables of this type have the name context, _not_
+// ctx (to avoid confusion with context.Context).
+type Context struct {
+       VMVersion uint64
+       Code      []byte
+       Arguments [][]byte
+
+       EntryID []byte
+
+       // TxVersion must be present when verifying transaction components
+       // (such as spends and issuances).
+       TxVersion   *uint64
+       BlockHeight *uint64
+
+       // Fields below this point are required by particular opcodes when
+       // verifying transaction components.
+
+       NumResults    *uint64
+       AssetID       *[]byte
+       Amount        *uint64
+       DestPos       *uint64
+       SpentOutputID *[]byte
+
+       TxSigHash   func() []byte
+       CheckOutput func(index uint64, amount uint64, assetID []byte, vmVersion uint64, code []byte, expansion bool) (bool, error)
+}