Fee Grant

The feegrant module allows accounts (granters) to grant fee allowances to other accounts (grantees). This allows the grantee to use the granter’s funds to pay for transaction fees.

Messages

MsgGrantAllowance

A fee allowance grant is created using the MsgGrantAllowance message. If there is already a grant for the (granter, grantee) pair, then the new grant will overwrite the previous one.

import { Network } from "@injectivelabs/networks";
import { MsgBroadcasterWithPk } from "@injectivelabs/sdk-ts/core/tx";
import { MsgGrantAllowance } from "@injectivelabs/sdk-ts/core/modules";

const privateKeyOfGranter = "0x...";

const date = new Date("2023-10-02T00:00:00Z");
const expiration = date.getTime() / 1000;
const granter = "inj...";
const grantee = "inj...";
const allowance = {
  spendLimit: [
    {
      denom: "inj",
      amount: "10000",
    },
  ],
  expiration,
};

const msg = MsgGrantAllowance.fromJSON({
  granter,
  grantee,
  allowance,
});

const txHash = await new MsgBroadcasterWithPk({
  privateKey: privateKeyOfGranter,
  network: Network.Testnet,
}).broadcast({
  msgs: msg,
});

console.log(txHash);

MsgRevokeAllowance

A grant can be removed using the MsgRevokeAllowance message. The grantee will no longer be able to use the granter’s funds to pay for transaction fees.

import { Network } from "@injectivelabs/networks";
import { MsgBroadcasterWithPk } from "@injectivelabs/sdk-ts/core/tx";
import { MsgRevokeAllowance } from "@injectivelabs/sdk-ts/core/modules";

const privateKey = "0x...";
const granteeAddress = "inj...";
const granterAddress = "inj...";

const params = {
  grantee: granteeAddress,
  granter: granterAddress,
};

const msg = MsgRevokeAllowance.fromJSON(params);

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Testnet,
}).broadcast({
  msgs: msg,
});

console.log(txHash);