AION Credit Protocol - Aptos Mainnet

A decentralized credit protocol built on Aptos blockchain using the Move programming language. The protocol enables overcollateralized lending with USDC, featuring a reputation-based credit system.

Mainnet Deployment

Contract Addresses

Contract	Address
Protocol (All Modules)	`0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172`
Admin	`0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78`
USDC Token (Metadata)	`0xbae207659db88bea0cbead6da0ed00aac12edcdda169e591cd41c94180b46f3b`

Explorer Links

Contract: View on Explorer
Deployment Tx: View Transaction

Module Addresses

All modules are deployed under the protocol address. Access them using:

0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::credit_manager
0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::lending_pool
0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::collateral_vault
0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::reputation_manager
0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::interest_rate_model

Initialization Transactions

Module	Transaction Hash
interest_rate_model	`0xf16be1090c4911d457a8aff5d0082e7a2e6d38b440fd3cc840e1652cf59beae3`
reputation_manager	`0x8e09d15a0ba458fc24ac6776695fe0a008d63dc896231118e5a3d2f048e705b2`
lending_pool	`0xe18de65db63dcd58d155161e22552a35902be761c5bc78be13178d1ea6caafdb`
collateral_vault	`0xbbb998bbc3f7ec3f31155b5ec8dc7d3f0242161bd212ea9ae875a11b616eda2a`
credit_manager	`0x625455aa42404cbe14bb7de99badc3b10667d200cc833791221c9f06e5e30cf8`

Architecture

The protocol consists of 5 main modules:

┌─────────────────┐    ┌──────────────────┐    ┌─────────────────┐
│  Interest Rate  │    │   Reputation     │    │  Collateral     │
│     Model       │    │    Manager       │    │     Vault       │
└─────────────────┘    └──────────────────┘    └─────────────────┘
         │                       │                       │
         └───────────────────────┼───────────────────────┘
                                 │
                    ┌─────────────────────┐
                    │   Credit Manager    │
                    │   (Orchestrator)    │
                    └─────────────────────┘
                                 │
                    ┌─────────────────────┐
                    │    Lending Pool     │
                    │    (Liquidity)      │
                    └─────────────────────┘

1. Credit Manager (`credit_manager`)

Core orchestration layer for the protocol
Manages credit line creation and lifecycle
Handles borrowing, repayment, and liquidation logic
Integrates with all other modules
Manages credit limit increases based on reputation

2. Lending Pool (`lending_pool`)

Manages liquidity deposits and withdrawals from lenders
Handles borrowing and repayment flows
Distributes interest to lenders proportionally
Collects protocol fees (10% of interest)
Tracks utilization rates

3. Collateral Vault (`collateral_vault`)

Manages borrower collateral deposits
Handles collateral locking/unlocking
Supports liquidation mechanisms
Configurable collateralization ratio (default 150%)
Liquidation threshold (default 120%)

4. Reputation Manager (`reputation_manager`)

Tracks borrower credit scores (0-1000)
Records on-time vs late payments
Manages reputation tiers (Bronze, Silver, Gold, Platinum)
Enables credit limit increases based on good behavior

5. Interest Rate Model (`interest_rate_model`)

Manages interest rate calculations
Default fixed rate: 15% APR
Configurable grace period (default 30 days)
Supports both fixed and dynamic rate models

Token Standard

The protocol uses the Aptos Fungible Asset Standard with support for Dispatchable Tokens. This enables compatibility with:

Native USDC on Aptos
Any fungible asset following the Aptos FA standard

Integration Guide

For Frontend/SDK Integration

Constants

const PROTOCOL_ADDRESS = "0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172";
const ADMIN_ADDRESS = "0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78";
const USDC_METADATA = "0xbae207659db88bea0cbead6da0ed00aac12edcdda169e591cd41c94180b46f3b";

For Lenders

1. Deposit USDC to Lending Pool

aptos move run \
  --function-id 0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::lending_pool::deposit \
  --args address:0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78 u64:<amount_in_micro_usdc>

2. Withdraw from Lending Pool

aptos move run \
  --function-id 0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::lending_pool::withdraw \
  --args address:0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78 u64:<amount_in_micro_usdc>

3. View Lender Info

aptos move view \
  --function-id 0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::lending_pool::get_lender_info \
  --args address:0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78 address:<lender_address>

For Borrowers

1. Open Credit Line (with collateral)

aptos move run \
  --function-id 0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::credit_manager::open_credit_line \
  --args address:0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78 u64:<collateral_amount>

2. Add More Collateral

aptos move run \
  --function-id 0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::credit_manager::add_collateral \
  --args address:0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78 u64:<amount>

3. Borrow USDC

aptos move run \
  --function-id 0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::credit_manager::borrow \
  --args address:0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78 u64:<amount>

4. Borrow and Pay Directly to Recipient

aptos move run \
  --function-id 0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::credit_manager::borrow_and_pay \
  --args address:0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78 address:<recipient> u64:<amount>

5. Repay Loan

aptos move run \
  --function-id 0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::credit_manager::repay \
  --args address:0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78 u64:<principal_amount> u64:<interest_amount>

6. Withdraw Collateral (after repaying debt)

aptos move run \
  --function-id 0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::credit_manager::withdraw_collateral \
  --args address:0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78 u64:<amount>

7. View Credit Info

aptos move view \
  --function-id 0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::credit_manager::get_credit_info \
  --args address:0xceb67803c3af67e2031e319f021e693ead697dda75e59a7b85a7e75a1cda4d78 address:<borrower_address>

Returns: (collateral_deposited, credit_limit, borrowed_amount, interest_accrued, total_debt, repayment_due_date, is_active)

View Functions

Lending Pool

Function	Returns
`get_available_liquidity(pool_addr)`	Available USDC for borrowing
`get_utilization_rate(pool_addr)`	Pool utilization in basis points
`get_total_deposited(pool_addr)`	Total deposits
`get_total_borrowed(pool_addr)`	Total borrowed
`get_lender_info(pool_addr, lender)`	(deposited, earned_interest, timestamp)

Credit Manager

Function	Returns
`get_credit_info(manager_addr, borrower)`	Full credit line details
`get_repayment_history(manager_addr, borrower)`	(on_time, late, total_repaid)
`check_credit_increase_eligibility(manager_addr, borrower)`	(eligible, new_limit)

Reputation Manager

Function	Returns
`get_reputation_score(manager_addr, user)`	Score (0-1000)
`get_reputation_tier(manager_addr, user)`	Tier (0-3)

Collateral Vault

Function	Returns
`get_collateral_balance(vault_addr, user)`	Collateral amount
`get_user_collateral(vault_addr, user)`	(amount, locked, available, status)

Protocol Parameters

Interest Rate Model

Parameter	Default Value
Base Rate	15% APR (1500 basis points)
Max Rate	20% APR
Penalty Rate	30% APR
Grace Period	30 days

Credit Manager

Parameter	Default Value
Fixed Interest Rate	15% APR
Reputation Threshold	750 (for credit increase)
Credit Increase Multiplier	120%
Min Collateral	1 USDC
Min Borrow	0.1 USDC

Collateral Vault

Parameter	Default Value
Collateralization Ratio	150%
Liquidation Threshold	120%
Max Collateral	1,000,000 USDC

Lending Pool

Parameter	Default Value
Protocol Fee	10% of interest
Min Deposit	1 USDC

Events

The protocol emits events for all major actions:

Credit Manager Events

CreditOpenedEvent - Credit line opened
BorrowedEvent - Funds borrowed
DirectPaymentEvent - Borrow and pay to recipient
RepaidEvent - Loan repaid
LiquidatedEvent - Position liquidated
CreditLimitIncreasedEvent - Credit limit increased
CollateralAddedEvent - Collateral added
CollateralWithdrawnEvent - Collateral withdrawn

Lending Pool Events

DepositEvent - Funds deposited
WithdrawEvent - Funds withdrawn
BorrowEvent - Funds borrowed
RepayEvent - Loan repaid

Reputation Manager Events

ReputationInitializedEvent - User reputation initialized
ReputationUpdatedEvent - Score updated
TierChangedEvent - Tier changed

Security Features

Move Resource Model: Prevents reentrancy and ensures asset safety
Two-Step Admin Transfer: Secure admin ownership changes
Pausable Modules: Emergency stop functionality
Access Control: Role-based permissions
Parameter Validation: Comprehensive input validation
Overflow Protection: Move's built-in safe math

Admin Functions

Pause/Unpause (Emergency)

# Pause
aptos move run --function-id <module>::pause --args address:<module_addr>

# Unpause
aptos move run --function-id <module>::unpause --args address:<module_addr>

Transfer Admin (Two-Step)

# Step 1: Initiate transfer
aptos move run --function-id <module>::transfer_admin --args address:<module_addr> address:<new_admin>

# Step 2: New admin accepts
aptos move run --function-id <module>::accept_admin --args address:<module_addr>

Update Parameters

# Update credit manager parameters
aptos move run \
  --function-id 0x636df8ee3f59dfe7d17ff23d3d072b13c38db48740ac18c27f558e6e26165172::credit_manager::update_parameters \
  --args address:<manager_addr> u256:<interest_rate> u256:<reputation_threshold> u256:<credit_multiplier>

Development

Compile

aptos move compile

Test

aptos move test

Deploy (New Instance)

# Set address to "_" in Move.toml first
aptos move deploy-object --address-name credit_protocol

USDC on Aptos

Mainnet USDC

Metadata Address: 0xbae207659db88bea0cbead6da0ed00aac12edcdda169e591cd41c94180b46f3b
Decimals: 6
Standard: Aptos Fungible Asset (with Dispatchable hooks)

Testnet USDC

Metadata Address: 0x69091fbab5f7d635ee7ac5098cf0c1efbe31d68fec0f2cd565e8d168daf52832

Amount Conversions

USDC has 6 decimals:

1 USDC = 1,000,000 (micro USDC)
0.1 USDC = 100,000
0.01 USDC = 10,000

License

MIT License

Support

For questions or issues, please open an issue in this repository.

Name		Name	Last commit message	Last commit date
Latest commit History 16 Commits
sources		sources
.gitignore		.gitignore
INTEGRATION2.0_GUIDE.md		INTEGRATION2.0_GUIDE.md
INTEGRATION_GUIDE.md		INTEGRATION_GUIDE.md
MAINNET_INTEGRATION_GUIDE.md		MAINNET_INTEGRATION_GUIDE.md
Move.lock		Move.lock
Move.toml		Move.toml
README.md		README.md

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AION Credit Protocol - Aptos Mainnet

Mainnet Deployment

Contract Addresses

Explorer Links

Module Addresses

Initialization Transactions

Architecture

1. Credit Manager (credit_manager)

2. Lending Pool (lending_pool)

3. Collateral Vault (collateral_vault)

4. Reputation Manager (reputation_manager)

5. Interest Rate Model (interest_rate_model)

Token Standard

Integration Guide

For Frontend/SDK Integration

Constants

For Lenders

1. Deposit USDC to Lending Pool

2. Withdraw from Lending Pool

3. View Lender Info

For Borrowers

1. Open Credit Line (with collateral)

2. Add More Collateral

3. Borrow USDC

4. Borrow and Pay Directly to Recipient

5. Repay Loan

6. Withdraw Collateral (after repaying debt)

7. View Credit Info

View Functions

Lending Pool

Credit Manager

Reputation Manager

Collateral Vault

Protocol Parameters

Interest Rate Model

Credit Manager

Collateral Vault

Lending Pool

Events

Credit Manager Events

Lending Pool Events

Reputation Manager Events

Security Features

Admin Functions

Pause/Unpause (Emergency)

Transfer Admin (Two-Step)

Update Parameters

Development

Compile

Test

Deploy (New Instance)

USDC on Aptos

Mainnet USDC

Testnet USDC

Amount Conversions

License

Support

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1. Credit Manager (`credit_manager`)

2. Lending Pool (`lending_pool`)

3. Collateral Vault (`collateral_vault`)

4. Reputation Manager (`reputation_manager`)

5. Interest Rate Model (`interest_rate_model`)

Packages