message: fix off-by-one buffer
diff: @@ -361,9 +361,9 @@ export function makeNamespacePreorderSkeleton(
  const hashed = hash160(dataBuff)
  let btcBurnAmount = DUST_MINIMUM
  - let opReturnBufferLen = 40
  + let opReturnBufferLen = 39
  if (burnAmount.units === 'STACKS') {
  - opReturnBufferLen = 48
  + opReturnBufferLen = 47
  } else {
  btcBurnAmount = parseInt(burnAmount.amount.toHex(), 16)
  }
  @@ -376,7 +376,7 @@ export function makeNamespacePreorderSkeleton(
  if (burnAmount.units === 'STACKS') {
  const burnHex = burnAmount.amount.toHex()
  const paddedBurnHex = `0000000000000000${burnHex}`.slice(-16)
  - opReturnBuffer.write(paddedBurnHex, 40, 16, 'hex')
  + opReturnBuffer.write(paddedBurnHex, 39, 16, 'hex')
  }
  const nullOutput = bitcoin.script.nullDataOutput(opReturnBuffer)
  