bscript.compie - minimal encoding of -1 stack element

Author: afk11

src/script.js

@@ -39,7 +39,7 @@ function compile (chunks) {
  // data chunk
  if (Buffer.isBuffer(chunk)) {
  // adhere to BIP62.3, minimal push policy
- if (chunk.length === 1 && chunk[0] >= 1 && chunk[0] <= 16) {
+ if (chunk.length === 1 && (chunk[0] === 0x81 || chunk[0] >= 1 && chunk[0] <= 16)) {
  return accum + 1
  }
 
@@ -64,6 +64,12 @@ function compile (chunks) {
  return
  }
 
+ if (chunk.length === 1 && chunk[0] === 0x81) {
+ buffer.writeUInt8(OPS.OP_1NEGATE, offset)
+ offset += 1
+ return
+ }
+
  offset += bufferutils.writePushDataInt(buffer, chunk.length, offset)
 
  chunk.copy(buffer, offset)

test/fixtures/script.json

@@ -1,5 +1,12 @@
 {
  "valid": [
+ {
+ "asm": "OP_1NEGATE",
+ "script": "4f",
+ "stack": [
+ "81"
+ ]
+ },
  {
  "asm": "304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801",
  "script": "47304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801",