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Setup Contracts

Configure the contract addresses and utility functions for interacting with USDC and NFT contracts.

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Create Contracts Config

Update src/lib/contracts.ts: 
export const CONTRACTS = {
  PACKAGE_ID: "0xa552a0057e4795edb5b6e5f0fbc9af98e69628a8dc96f11a363675c65eda17b1",
  USDC_TREASURY_CAP: "0xb172a6fb5da46b56ccaaf3374b9fcc0a5955653c6190f9073433a3f16e95db4e",
  NFT_TREASURY: "0x100ecbcc66d76ea44161940ecc0a637b26d8dcfc4903c1d355d7db946c13ae9a",
} as const;

// Token types for querying
export const USDC_TYPE = `${CONTRACTS.PACKAGE_ID}::usdc::USDC`;
export const NFT_TYPE = `${CONTRACTS.PACKAGE_ID}::psil_nft::PSILNFT`;

// Constants
export const USDC_DECIMALS = 6;
export const USDC_MINT_AMOUNT = 100;
export const NFT_MINT_PRICE = 100_000_000n; // 100 USDC

// Format USDC for display (100000000 -> "100.00")
export const formatUSDC = (amount: bigint | number): string => {
  const value = Number(amount) / 10 ** USDC_DECIMALS;
  return value.toLocaleString(undefined, {
    minimumFractionDigits: 2,
    maximumFractionDigits: 2
  });
};

// Parse USDC amount (100 -> 100000000n)
export const parseUSDC = (amount: number): bigint => {
  return BigInt(Math.floor(amount * 10 ** USDC_DECIMALS));
};

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Understanding the Config

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Contract Addresses

AddressDescription
PACKAGE_IDThe deployed Move package
USDC_TREASURY_CAPShared object for minting USDC
NFT_TREASURYShared object for NFT minting

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Token Types

Token types are used to query balances and filter objects: 
// Format: {package_id}::{module}::{type}
USDC_TYPE = "0x...::usdc::USDC"
NFT_TYPE = "0x...::psil_nft::PSILNFT"

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Decimals

USDC uses 6 decimal places:
  • 100 USDC = 100_000_000 (raw value)
  • formatUSDC(100_000_000) returns "100.00"
  • parseUSDC(100) returns 100_000_000n

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Next Steps

Create Hooks

Build custom hooks for blockchain interactions