* fix(cli): Allow max 1 DIRECT signer per tx * Use sdkerrors * Update client/tx/tx_test.go * add more test * cl * Fix test * Update x/auth/client/testutil/suite.go * Address nits
* fix(cli): Allow max 1 DIRECT signer per tx * Use sdkerrors * Update client/tx/tx_test.go * add more test * cl * Fix test * Update x/auth/client/testutil/suite.go * Address nits