Contracts stack

Layer	Used here
Language	Solidity 0.8.28
Token and payment interfaces	OpenZeppelin Contracts 5.7.0: ERC-721, ERC-20 and SafeERC20
Build and tests	Foundry: Forge, forge-std 1.16.2, Solidity tests and fuzz tests
Client examples	viem: ABI encoding, contract reads, simulation and receipt decoding

Read contracts

Install viem. These examples use Base Sepolia; choose addresses and network availability from deployed contracts.

import { createPublicClient, http } from 'viem';
import { baseSepolia } from 'viem/chains';

const publicClient = createPublicClient({ chain: baseSepolia, transport: http() });
const evmContracts = {
  factory: '0x4Ac838b970D44AB9056b4201e9ED3c1Ce271545e',
  remix: '0xC5c7d2645A7119b538C8d752Ce61c9706cDF7A36',
  royalties: '0xff402e0C8c9a19f855200524260A858DDF99EdcD',
};

Reads need an RPC connection. Each contract page gives the ABI signatures for its example.

Send a contract call

Connect your selected wallet through its EIP-1193 walletProvider. Supply the connected address as account when simulating a write:

import { createWalletClient, custom } from 'viem';

const walletClient = createWalletClient({
  chain: baseSepolia,
  transport: custom(walletProvider),
});
const [account] = await walletClient.getAddresses();
if (!account || await walletClient.getChainId() !== baseSepolia.id) {
  throw new Error('Connect a wallet on Base Sepolia');
}

The contract examples simulate the requested call, ask the wallet to sign it and wait for its receipt. Keep the selected account and chain fixed during the operation. Save the returned hash before waiting; if confirmation is interrupted, look it up before submitting again.

Build and test locally

Clone the blockchain repository, install Foundry, then run from contracts/:

forge install foundry-rs/forge-std@v1.16.2
forge install OpenZeppelin/openzeppelin-contracts@v5.7.0
forge build --contracts src
forge test --contracts src
forge inspect Factory abi --contracts src --json

Use --contracts src with this repository: its Solidity files are in src/. The build uses the configured optimizer and IR pipeline. The tests cover minting, license purchases, repeat purchases, variation rights, payment rollback, creator updates and split calculations. Forge reference · Contract source

Overview

Contracts

Programs

Read contracts

Send a contract call

Build and test locally

​Read contracts

​Send a contract call

​Build and test locally

Read contracts

Send a contract call

Build and test locally