Decoding #1: Standard VS non-Standard ScriptsDecoding #1: Standard VS non-Standard Scripts

• We're starting a series of posts to teach you about Bitcoin development. We'll be sharing them here. Tell us how we can make it better!
• If you prefer reading on the website, check 👉 https://bitcoindevs.xyz/decoding/standard-nonstandard

1- Standard Script1- Standard Script

Standard scripts are predefined and widely accepted transaction scripts in Bitcoin.

• Key Features:
  • Predefined templates (e.g., P2PKH, P2SH).
  • Well-tested and quickly verified by nodes.
  • Widely relayed and accepted on the network.

Below is a timeline of different output script types before and after SegWit.

NOTE: Relay PolicyNOTE: Relay Policy

Bitcoin Core will only relay transactions by default that pass the IsStandardTx() check. However, miners are still free to include (valid!) non-standard transactions in their blocks.

2- Non-Standard Scripts2- Non-Standard Scripts

• Non-standard scripts deviate from commonly used templates for transaction.
• Standard scripts, such as P2PKH and P2SH, are widely recognized and accepted by nodes. Any script that deviates from these templates is considered non-standard and will not be relayed by the network.
• They are valid but are not relayed by most nodes for safety reasons.

Remember this pls => Non-standard scripts are still VALID

Question: What if I want my Non-Standard Transaction Relayed and Mined?Question: What if I want my Non-Standard Transaction Relayed and Mined?

find the answer here 👉 https://bitcoindevs.xyz/decoding/standard-nonstandard