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Authorization

The user should grant authorization to allow smart contracts to send messages on behalf of a user account. This is achieved by the Authorization.sol that provides the necessary functions to grant approvals and allowances. The precompiled contracts use the AuthorizationI interface, to allow users to approve the corresponding messages and amounts.

Solidity Interfaces​

Authorization.sol

Find the Solidity interface in the cosmos/evm repo

Transactions​

approve​

Approves a list of Edgen Chain or IBC transactions with a specific amount of tokens

function approve(
    address spender,
    uint256 amount,
    string[] calldata methods
) external returns (bool approved);

revoke​

Revokes authorizations of Edgen Chain transactions.

function revoke(
    address spender,
    string[] calldata methods
) external returns (bool revoked);

increaseAllowance​

Increase the allowance of a given spender by a specific amount of tokens for IBC transfer methods or staking

function increaseAllowance(
    address spender,
    uint256 amount,
    string[] calldata methods
) external returns (bool approved);

decreaseAllowance​

Decreases the allowance of a given spender by a specific amount of tokens for IBC transfer methods or staking

function decreaseAllowance(
    address spender,
    uint256 amount,
    string[] calldata methods
) external returns (bool approved);

Queries​

allowance​

Returns the remaining number of tokens that the spender will be allowed to spend on behalf of the owner through IBC transfer methods or staking. This is zero by default

function allowance(
    address owner,
    address spender,
    string calldata method
) external view returns (uint256 remaining);

Events​

Approval​

This event is emitted when the allowance of a spender is set by a call to the approve method. The value field specifies the new allowance and the methods field holds the information for which methods the approval was set.

event Approval(
    address indexed owner,
    address indexed spender,
    string[] methods,
    uint256 value
);

Revocation​

This event is emitted when an owner revokes a spender's allowance.

event Revocation(
    address indexed owner,
    address indexed spender,
    string[] methods
);

AllowanceChange​

This event is emitted when the allowance of a spender is changed by a call to the decrease or increase allowance method. The values field specifies the new allowances and the methods field holds the information for which methods the approval was set.

event AllowanceChange(
    address indexed owner,
    address indexed spender,
    string[] methods,
    uint256[] values
);