lightning-upgradewallet -- Command to spend all P2SH-wrapped inputs into a Native Segwit output

SYNOPSIS

upgradewallet [feerate] [reservedok]

upgradewallet is a convenience RPC which will spend all p2sh-wrapped
Segwit deposits in a wallet into a single Native Segwit P2WPKH address.

feerate is an optional feerate: see NOTES in lightning-feerates(7)
for possible values. The default is opening.

reservedok tells the wallet to include all P2SH-wrapped inputs, including
reserved ones.

The caller is trying to buy a liquidity ad but the command keeps failing.
They have funds in their wallet, but they're all P2SH-wrapped outputs.

The caller can call upgradewallet to convert their funds to native segwit
outputs, which are valid for liquidity ad buys.

~niftynei~ <[email protected]> is mainly responsible.