Bitcoin Script Overview

gist.md

rundown of different scripts and what is what and what goes where.

• the prevoutScript is the script of the output being spend
• the redeemScript is the script that is used to solve the P2SH
• the signatureScript is the script that is taken into the signatureHash for signing
• the witnessRedeemScript is the script that is used to solve the P2WSH
• the scriptSig is what goes into the input.scriptSig when serializing the TX
• the witnessScript is what goes into the input.witness when serializing the TX

for a P2KH

• prevoutScript = OP_DUP OP_HASH160 <{20byte}pubkeyHash> OP_EQUALVERIFY OP_CHECKSIG
• signatureScript = OP_DUP OP_HASH160 <{20byte}pubkeyHash> OP_EQUALVERIFY OP_CHECKSIG
• scriptSig = <sig> <pubkey>

for a P2SH[ 1of1 msig ]

• prevoutScript = OP_HASH160 <{20byte}scriptHash> OP_EQUAL
• redeemScript = OP_1 <pubkey1> <pubkey2> OP_2 OP_CHECKMULTISIG
• signatureScript = OP_1 <pubkey1> <pubkey2> OP_2 OP_CHECKMULTISIG
• scriptSig = <sigs> <redeemScript>

for a P2WPKH

• prevoutScript = OP_0 PUSH[<{20byte}pubkeyHash>]
• signatureScript = OP_DUP OP_HASH160 <{20byte}pubkeyHash> OP_EQUALVERIFY OP_CHECKSIG
• scriptSig = ''
• witnessScript = <sig> <pubkey>

for a P2SH[ P2WPKH ]

• prevoutScript = OP_HASH160 <{20byte}scriptHash> OP_EQUAL
• redeemScript = OP_0 PUSH[<{20byte}pubkeyHash>]
• signatureScript = OP_DUP OP_HASH160 <pubkeyHash> OP_EQUALVERIFY OP_CHECKSIG
• scriptSig = <redeemScript>
• witnessScript = <sig> <pubkey>

for a P2WSH[ 1of1 msig ]

• prevoutScript = OP_0 PUSH[<{32byte}pubkeyHash>]
• redeemScript = OP_1 <pubkey1> <pubkey2> OP_2 OP_CHECKMULTISIG
• signatureScript = OP_1 <pubkey1> <pubkey2> OP_2 OP_CHECKMULTISIG
• scriptSig = ''
• witnessScript = <sigs> <redeemScript>

for a P2SH[ P2WSH[ 1of1 msig ] ]

• prevoutScript = OP_HASH160 <{20byte}scriptHash> OP_EQUAL
• redeemScript = OP_0 PUSH[<{32byte}scriptHash>]
• witnessRedeemScript = OP_1 <pubkey1> <pubkey2> OP_2 OP_CHECKMULTISIG
• signatureScript = OP_1 <pubkey1> <pubkey2> OP_2 OP_CHECKMULTISIG
• scriptSig = <redeemScript>
• witnessScript = <sigs> <witnessRedeemScript>

for a P2SH[ P2WSH[ P2WPKH ] ]

• prevoutScript = OP_HASH160 <{20byte}scriptHash> OP_EQUAL
• redeemScript = OP_0 PUSH[<{32byte}scriptHash>]
• witnessRedeemScript = OP_DUP OP_HASH160 <pubkeyHash> OP_EQUALVERIFY OP_CHECKSIG
• signatureScript = OP_DUP OP_HASH160 <pubkeyHash> OP_EQUALVERIFY OP_CHECKSIG
• scriptSig = <redeemScript>
• witnessScript = <sig> <pubkey> <witnessRedeemScript>

Very helpful. Thanks