Core lightning, pay via a specific channel or with full channels. Shell script using `lightning-cli` and `jq`

gistfile1.txt

```
$ cat pay-using-channel.sh 
#!/bin/sh

CHANNEL=$1
BOLT11=$2

[ -z "$CHANNEL" ] && echo "first program argument should be a short channel id and it is unset or set to the empty string" && exit 1
[ -z "$BOLT11" ] && echo "second program argument should be a bolt11 invoice and it is unset or set to the empty string" && exit 1

EXCLUDE=$(./exclude-all-channels-but.sh $CHANNEL)


lightning-cli pay -k bolt11=$BOLT11 exclude="${EXCLUDE}"

$ cat exclude-all-channels-but.sh 
#!/bin/sh

CMD=${TEST_CMD:-lightning-cli listfunds}
$CMD | jq -c "[.channels.[] | select(.state==\"CHANNELD_NORMAL\") | select(.short_channel_id!=\"$1\") | (.short_channel_id + \"/0\"), (.short_channel_id + \"/1\")  ]"

$ cat half-empty-channels.sh 
#!/bin/sh

CMD=${TEST_CMD:-lightning-cli listfunds}
$CMD | jq -c "[.channels.[] | select(.state==\"CHANNELD_NORMAL\") | select(.short_channel_id!=\"$1\") | select(.our_amount_msat/.amount_msat<0.6) | (.short_channel_id + \"/0\"), (.short_channel_id + \"/1\")  ]"

```