To prepare margin trading testing env, for ref-v1 and ref-dcl contract, we apply to add burrow and meme-burrow in private mainnet env to the client-echo senders, and usdc native, usdt native, several meme, wnear, eth, wbtc as client-echo tokens.
After that, the burrow and meme-burrow contract can initiate swap with client-echo msg for post-actions.