P2SH

Pay-to-Script-Hash — a Bitcoin output type that locks funds to the hash of a redeem script, deferring the script complexity to spend time. P2SH addresses start with '3' and enabled wallets to encode multisig and other complex conditions without the sender needing to know the full script. Superseded by P2WSH for new multisig deployments because P2WSH moves the witness data outside the transaction weight.