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txscript: Comment improvements and fixes

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This commit improves and corrects a few comments in txscript to ensure
they match reality.
This commit is contained in:
Dave Collins 2016-02-11 21:36:40 -06:00
parent d272bfebb7
commit 9abc2c0e19
1 changed files with 6 additions and 6 deletions
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12
txscript/opcode.go
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@ -18,8 +18,8 @@ import (
"github.com/btcsuite/golangcrypto/ripemd160"
)
// An opcode defines the information related to a txscript opcode. opfunc if
// present is the function to call to perform the opcode on the script. The
// An opcode defines the information related to a txscript opcode. opfunc, if
// present, is the function to call to perform the opcode on the script. The
// current script is passed in as a slice with the first member being the opcode
// itself.
type opcode struct {
@ -1106,7 +1106,7 @@ func opcodeToAltStack(op *parsedOpcode, vm *Engine) error {
// opcodeFromAltStack removes the top item from the alternate data stack and
// pushes it onto the main data stack.
//
// Main data stack transformation: [... x1 x2 x3] -> [... x1 x2 x3 y1]
// Main data stack transformation: [... x1 x2 x3] -> [... x1 x2 x3 y3]
// Alt data stack transformation: [... y1 y2 y3] -> [... y1 y2]
func opcodeFromAltStack(op *parsedOpcode, vm *Engine) error {
so, err := vm.astack.PopByteArray()
@ -1163,8 +1163,8 @@ func opcode2Swap(op *parsedOpcode, vm *Engine) error {
// opcodeIfDup duplicates the top item of the stack if it is not zero.
//
// Stack transformation (x1==0): [... x1] -> [...]
// Stack transformation (x1!=0): [... x1] -> [... x1]
// Stack transformation (x1==0): [... x1] -> [... x1]
// Stack transformation (x1!=0): [... x1] -> [... x1 x1]
func opcodeIfDup(op *parsedOpcode, vm *Engine) error {
so, err := vm.dstack.PeekByteArray(0)
if err != nil {
@ -1965,7 +1965,7 @@ func opcodeCheckSigVerify(op *parsedOpcode, vm *Engine) error {
// parsedSigInfo houses a raw signature along with its parsed form and a flag
// for whether or not it has already been parsed. It is used to prevent parsing
// the same signature multiple times when verify a multisig.
// the same signature multiple times when verifying a multisig.
type parsedSigInfo struct {
signature []byte
parsedSignature *btcec.Signature