Integrate an Earn Product

Give users a one-deposit USDC earn experience with Morpho or Moonwell vaults on Base.

Embed a vault-based earn product through third-party protocols on Base. The user deposits once and receives vault shares; the vault abstracts its underlying market allocations while your app shows current redeemable value and risk.

Demo

Deposit into a USDC vault

Both examples use viem@2.55.11 and @morpho-org/morpho-sdk@5.4.1. The Moonwell tab also uses @moonwell-fi/moonwell-sdk@0.22.0 for its maintained deployment addresses.

Morpho

Deposit into Steakhouse Prime USDC, a Morpho Vault V2 on Base. Treat the address as pinned configuration and review it whenever you upgrade the integration.

deposit-morpho-vault.ts

import {
  isRequirementSignature,
  morphoViemExtension,
} from '@morpho-org/morpho-sdk';
import { parseUnits } from 'viem';
import { base } from 'viem/chains';

const vaultAddress = '0xBEeF0e0834849Acc03F0089F01F4F1EeB06873c9';
const user = walletClient.account.address;
const client = publicClient.extend(morphoViemExtension());
const vault = client.morpho.vaultV2(vaultAddress, base.id);
const action = await vault.deposit({
  amount: parseUnits('1000', 6),
  userAddress: user,
  vaultData: await vault.getData(),
});

const signatures = [];
for (const requirement of await action.getRequirements()) {
  if (isRequirementSignature(requirement)) {
    signatures.push(await requirement.sign(walletClient, user));
  } else {
    const hash = await walletClient.sendTransaction(requirement);
    await publicClient.waitForTransactionReceipt({ hash });
  }
}
const request = action.buildTx(signatures);
await publicClient.call({ account: user, ...request });
const hash = await walletClient.sendTransaction(request);
await publicClient.waitForTransactionReceipt({ hash });

Moonwell

Use Moonwell’s maintained SDK to resolve the Flagship USDC Vault V2 address, then build the deposit with the Morpho vault SDK.

deposit-moonwell-vault.ts

import { createMoonwellClient } from '@moonwell-fi/moonwell-sdk';
import {
  isRequirementSignature,
  morphoViemExtension,
} from '@morpho-org/morpho-sdk';
import { parseUnits } from 'viem';
import { base } from 'viem/chains';

const moonwell = createMoonwellClient({
  networks: { base: { rpcUrls: ['https://mainnet.base.org'] } },
});
const vaultAddress = moonwell.environments.base.tokens.mwUSDC.address;
const user = walletClient.account.address;
const client = publicClient.extend(morphoViemExtension());
const vault = client.morpho.vaultV2(vaultAddress, base.id);
const action = await vault.deposit({
  amount: parseUnits('1000', 6),
  userAddress: user,
  vaultData: await vault.getData(),
});

const signatures = [];
for (const requirement of await action.getRequirements()) {
  if (isRequirementSignature(requirement)) {
    signatures.push(await requirement.sign(walletClient, user));
  } else {
    const hash = await walletClient.sendTransaction(requirement);
    await publicClient.waitForTransactionReceipt({ hash });
  }
}
const request = action.buildTx(signatures);
await publicClient.call({ account: user, ...request });
const hash = await walletClient.sendTransaction(request);
await publicClient.waitForTransactionReceipt({ hash });

Vault yield is variable and not guaranteed. Review the curator, allocation strategy, fees, withdrawal liquidity, and smart-contract risk before listing a vault, and show users the current share-to-asset value rather than a fixed return.

See also

• Integrate lending · Integrate borrowing
• Integrate DeFi overview