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            • III.II.II.III ZERO Threshold Proposals
            • III.II.II.IV Proposal Matrix
          • III.II.III Checkpoints and Voting
          • III.II.IV Proposing
          • III.II.V Inflation Mechanics
          • III.II.VI Dutch Auction
          • III.II.VII Delegation
          • III.II.VIII ZERO Claiming of Residual Value
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        • III.VI Immutable ZERO Parameters
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    • Adopted Guidance
      • Adopted Guidance v1.30
        • 1. Description of the Adopted Guidance
          • 1.1. Purpose of the Adopted Guidance
          • 1.2. Change Process for the Adopted Guidance
        • 2. Ecosystem Description
          • 2.1. Actors
          • 2.2. Mandatory Contracts
          • 2.3. Duty of Transparency
          • 2.4. Core Operational Flows
            • 2.4.1. Update Collateral Process
            • 2.4.2. Minting M
            • 2.4.3. Retrieval of Collateral
          • 2.5. High-Risk Jurisdictions
        • 3. Eligible Collateral
          • 3.1. Criteria for Eligible Collateral
          • 3.2. Valuation Policy for Eligible Collateral
          • 3.3. Collateral Storage
          • 3.4. Approved Jurisdictions
            • 3.4.1. Bankruptcy Remoteness
            • 3.4.2. Non-Petition and Non-Seizure Provisions
            • 3.4.3. Priority of Payments and Subordination
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        • 4. SPV Operators
          • 4.1. Contact Information of Currently Approved SPV Operators
          • 4.2. Eligibility Criteria for Approved SPV Operators
          • 4.3. Obligations of SPV Operators
            • 4.3.1. Obligations in the Normal Course of Business
            • 4.3.2. Obligations Outside of the Normal Course of Business
              • 4.3.2.1. Amicable Wind Down Process
              • 4.3.2.2. Non-Amicable Wind Down Process
              • 4.3.2.3. Minter Insolvency
              • 4.3.2.4. Unauthorized Termination of Minter – SPV Operator Agreement
            • 4.3.3. Operational Obligations of SPV Operators
              • 4.3.3.1. Co-signature of the SPV for significant payments
              • 4.3.3.2. Cooperation with Validators
              • 4.3.3.3. Maintenance of Administrative Buffer
              • 4.3.3.4. No Wire Back Instructions
          • 4.4. Guidelines for Submission of Approval Requests
        • 5. Validators
          • 5.1. Contact Information of Currently Permissioned Validators
          • 5.2. Eligibility Criteria for Permissioned Validators
          • 5.3. Obligations of Validators
          • 5.4. Guidelines for Submission of Permissioning Requests
        • 6. BD Minters and Minters
          • 6.1. Contact Information of Currently Permissioned Minters
          • 6.2. Eligibility Criteria for Permissioned Minters
          • 6.3. Obligations of Minters
          • 6.4. BD Minter and Minter Compliance Requirements
          • 6.5. Guidelines for Submission of Permissioning Requests
        • Adopted Guidance PDF Version
      • Adopted Guidance v1.20 (deprecated)
        • Adopted Guidance PDF Version
    • Glossary
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  • Technical Documentation
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            • Stable Earner Interest Rate Model Contract
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    • TTG Technical Specification
      • Main Invariants
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        • 1. Registrar
          • Registrar Variables and Getters
          • Registrar Core Functions
        • 2. TTG Governors
          • Matrix Of TTG Proposals
          • 2.1 Standard Governor
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          • 2.2 Emergency Governor
            • Emergency Governor Variables And Getters
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            • Core functions
              • propose(targets[], values[], callDatas[], description): proposalId
              • castVote(proposalId, support): weight
              • castVotes(proposalIds[], supports): weight
              • execute(targets[], values[], callDatas[], description): proposalId
              • setThresholdRatio(newThresholdRatio)
              • getProposal(proposalId)
              • state(proposalId)
            • Core Governance Proposals
          • 2.3 ZERO Governor
            • Variables And Getters
            • Core Functions
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        • 3. POWER Token
          • Variables And Getters
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        • 4. ZERO Token
          • ZERO Token Core Functions
        • 5. Distribution Vault
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Copyright 2025 M0 Foundation

On this page
  • Functions
  • approve
  • transfer
  • transferFrom
  • allowance
  • balanceOf
  • decimals
  • name
  • symbol
  • totalSupply
  • Events
  • Approval
  • Transfer
  1. Technical Documentation
  2. Source Code Reference
  3. Common
  4. Contracts
  5. Interfaces

IERC20

PreviousIERC1271NextIERC20Extended

Author: M^0 Labs

The interface as defined by EIP-20: https://eips.ethereum.org/EIPS/eip-20

Functions

approve

Allows a calling account to approve spender to spend up to amount of its token balance.

MUST emit an Approval event.

function approve(address spender, uint256 amount) external returns (bool);

Parameters

Name
Type
Description

spender

address

The address of the account being allowed to spend up to the allowed amount.

amount

uint256

The amount of the allowance being approved.

Returns

Name
Type
Description

<none>

bool

Whether or not the approval was successful.

transfer

Allows a calling account to transfer amount tokens to recipient.

function transfer(address recipient, uint256 amount) external returns (bool);

Parameters

Name
Type
Description

recipient

address

The address of the recipient who's token balance will be incremented.

amount

uint256

The amount of tokens being transferred.

Returns

Name
Type
Description

<none>

bool

Whether or not the transfer was successful.

transferFrom

Allows a calling account to transfer amount tokens from sender, with allowance, to a recipient.

function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

Parameters

Name
Type
Description

sender

address

The address of the sender who's token balance will be decremented.

recipient

address

The address of the recipient who's token balance will be incremented.

amount

uint256

The amount of tokens being transferred.

Returns

Name
Type
Description

<none>

bool

Whether or not the transfer was successful.

allowance

Returns the allowance spender is allowed to spend on behalf of account.

function allowance(address account, address spender) external view returns (uint256);

Parameters

Name
Type
Description

account

address

The address of the account who's token balance spender is allowed to spend.

spender

address

The address of an account allowed to spend on behalf of account.

Returns

Name
Type
Description

<none>

uint256

The amount spender can spend on behalf of account.

balanceOf

Returns the token balance of account.

function balanceOf(address account) external view returns (uint256);

Parameters

Name
Type
Description

account

address

The address of some account.

Returns

Name
Type
Description

<none>

uint256

The token balance of account.

decimals

Returns the number of decimals UIs should assume all amounts have.

function decimals() external view returns (uint8);

name

Returns the name of the contract/token.

function name() external view returns (string memory);

symbol

Returns the symbol of the token.

function symbol() external view returns (string memory);

totalSupply

Returns the current total supply of the token.

function totalSupply() external view returns (uint256);

Events

Approval

Emitted when spender has been approved for amount of the token balance of account.

event Approval(address indexed account, address indexed spender, uint256 amount);

Parameters

Name
Type
Description

account

address

The address of the account.

spender

address

The address of the spender being approved for the allowance.

amount

uint256

The amount of the allowance being approved.

Transfer

Emitted when amount tokens is transferred from sender to recipient.

event Transfer(address indexed sender, address indexed recipient, uint256 amount);

Parameters

Name
Type
Description

sender

address

The address of the sender who's token balance is decremented.

recipient

address

The address of the recipient who's token balance is incremented.

amount

uint256

The amount of tokens being transferred.

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