Add script to list sellers and auto trigger swap

Uses best price to determine the seller to swap with.

docs/cli/discover_and_take.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+CLI_PATH=$1
+YOUR_MONERO_ADDR=$2
+YOUR_BITCOIN_ADDR=$3
+
+CLI_LIST_SELLERS="$CLI_PATH --testnet --json --debug list-sellers"
+echo "Requesting sellers with command: $CLI_LIST_SELLERS"
+echo
+
+BEST_SELLER=$($CLI_LIST_SELLERS | jq -s -c 'min_by(.status .Online .price)' | jq -r '.multiaddr, (.status .Online .price), (.status .Online .min_quantity), (.status .Online .max_quantity)')
+read ADDR PRICE MIN MAX < <(echo $BEST_SELLER)
+
+echo
+
+echo "Seller with best price:"
+echo "  multiaddr   : $ADDR"
+echo "  price       : $PRICE sat"
+echo "  min_quantity: $MIN sat"
+echo "  max_quantity: $MAX sat"
+
+echo
+
+CLI_SWAP="$CLI_PATH --testnet --debug buy-xmr --receive-address $YOUR_MONERO_ADDR --change-address $YOUR_BITCOIN_ADDR --seller $ADDR"
+
+echo "Starting swap with best seller using command $CLI_SWAP"
+echo
+$CLI_SWAP