fix: wrap setDefaultWallet in database transaction#36

0x-SquidSol wants to merge 1 commit intonullxnothing:mainnullxnothing/daemon:mainfrom

0x-SquidSol:fix/set-default-wallet-transaction0x-SquidSol/daemon-squid-findings:fix/set-default-wallet-transactionCopy head branch name to clipboard