Using x/feegrant

xfeegrant.md

Allow manifest1efd63aw40lxf3n4mhf7dzhjkr453axurm6rp3z (user2) to pay gas fees for manifest1hj5fveer5cjtn4wd6wstzugjfdxzl0xp8ws9ct (user1) for message type /cosmos.bank.v1beta1.MsgSend only.

manifestd tx feegrant grant manifest1efd63aw40lxf3n4mhf7dzhjkr453axurm6rp3z manifest1hj5fveer5cjtn4wd6wstzugjfdxzl0xp8ws9ct \
    --allowed-messages /cosmos.bank.v1beta1.MsgSend \
    --keyring-backend test \
    --home ~/.manifest-local1 \
    --gas auto \
    --gas-prices 0.001umfx \
    --gas-adjustment 1.3 \
    --from user2

Send some token from manifest1hj5fveer5cjtn4wd6wstzugjfdxzl0xp8ws9ct and make manifest1efd63aw40lxf3n4mhf7dzhjkr453axurm6rp3z pay for the fees

manifestd tx bank send manifest1hj5fveer5cjtn4wd6wstzugjfdxzl0xp8ws9ct manifest1afk9zr2hn2jsac63h4hm60vl9z3e5u69gndzf7c99cqge3vzwjzsfmy9qj 50umfx \
  --keyring-backend test \
  --home ~/.manifest-local1 \
  --from user1 \
  --fee-granter manifest1efd63aw40lxf3n4mhf7dzhjkr453axurm6rp3z \
  --gas auto \
  --gas-prices 0.001umfx \
  --gas-adjustment 1.3

Related genesis app_state entry

    "feegrant": {
      "allowances": [
        {
          "granter": "manifest1efd63aw40lxf3n4mhf7dzhjkr453axurm6rp3z",
          "grantee": "manifest1hj5fveer5cjtn4wd6wstzugjfdxzl0xp8ws9ct",
          "allowance": {
            "@type": "/cosmos.feegrant.v1beta1.AllowedMsgAllowance",
            "allowance": {
              "@type": "/cosmos.feegrant.v1beta1.BasicAllowance",
              "spend_limit": [],
              "expiration": null
            },
            "allowed_messages": [
              "/cosmos.bank.v1beta1.MsgSend"
            ]
          }
        }
      ]
    }

update_test_genesis '.app_state[\"feegrant\"][\"allowances\"]=[{\"granter\":\"${GAS_STATION_ADDR}\",\"grantee\":\"${BANK_ADDR}\",\"allowance\":{\"@type\":\"/cosmos.feegrant.v1beta1.AllowedMsgAllowance\",\"allowance\":{\"@type\":\"/cosmos.feegrant.v1beta1.BasicAllowance\",\"spend_limit\":[],\"expiration\":null},\"allowed_messages\":[\"/cosmos.bank.v1beta1.MsgSend\"]}}]'

Query grant

manifestd q feegrant grant manifest1efd63aw40lxf3n4mhf7dzhjkr453axurm6rp3z manifest1hj5fveer5cjtn4wd6wstzugjfdxzl0xp8ws9ct
allowance:
  allowance:
    type: cosmos-sdk/AllowedMsgAllowance
    value:
      allowance:
        type: cosmos-sdk/BasicAllowance
        value:
          spend_limit: []
      allowed_messages:
      - /cosmos.bank.v1beta1.MsgSend
  grantee: manifest1hj5fveer5cjtn4wd6wstzugjfdxzl0xp8ws9ct
  granter: manifest1efd63aw40lxf3n4mhf7dzhjkr453axurm6rp3z