Money Market on Base

Fragmented money markets mean lower capital efficiency and worse rates. The SODAX money market pools lending liquidity on the hub while letting users act from any supported network, including Base. A user can supply tokens from Base and borrow on another network, or borrow into their Base account against collateral held elsewhere, without your product running its own lending infrastructure. Four actions, all through sodax.moneyMarket: supply, borrow, withdraw, repay. Each has a complete one-call form (handles the relay end-to-end) and a create*Intent form when you want the transaction only. The money market list on Base is its own list, separate from the swap list: some tokens appear in one and not the other. Native ETH is in the money market list today. Read the list at runtime, as below, or see Networks & Assets.

Supply from Base

Supplying an ERC-20 needs an allowance first, the same as any EVM network:

import { Sodax, ChainKeys } from '@sodax/sdk';

const sodax = new Sodax();

// find() returns XToken | undefined, so narrow before using the address
const baseTokens = sodax.moneyMarket.getSupportedTokensByChainId(ChainKeys.BASE_MAINNET);
const usdc = baseTokens.find(t => t.symbol === 'USDC');
if (!usdc) throw new Error('USDC is not a supported money-market token on Base');

const params = {
  srcChainKey: ChainKeys.BASE_MAINNET,
  srcAddress: await walletProvider.getWalletAddress(),
  token: usdc.address,
  amount: 100n * 10n ** BigInt(usdc.decimals), // 100 USDC
  action: 'supply',
} as const;

const allowance = await sodax.moneyMarket.isAllowanceValid({ params });
if (!allowance.ok) throw allowance.error;
if (!allowance.value) {
  const approval = await sodax.moneyMarket.approve({ params, walletProvider });
  if (!approval.ok) throw approval.error;
  // wait for the approval to be mined before supplying
}

const result = await sodax.moneyMarket.supply({
  params,
  walletProvider, // IEvmWalletProvider, narrowed by srcChainKey
  timeout: 120_000, // optional relay timeout (default 120 s)
});

Supplying native ETH needs no approval.

Borrow to Base

dstChainKey and dstAddress default to the source, but any supported network can be the destination. That is the cross-network story in one parameter: collateral supplied from one network, borrowed liquidity delivered to another.

const bnUSD = baseTokens.find(t => t.symbol === 'bnUSD');
if (!bnUSD) throw new Error('bnUSD is not a supported money-market token on Base');

const result = await sodax.moneyMarket.borrow({
  params: {
    srcChainKey: ChainKeys.BASE_MAINNET,  // where the caller acts from
    srcAddress: userBaseAddress,
    token: bnUSD.address,                  // token on the destination network
    amount: 50n * 10n ** BigInt(bnUSD.decimals), // 50 bnUSD
    action: 'borrow',
    dstChainKey: ChainKeys.BASE_MAINNET,   // deliver on Base
    dstAddress: userBaseAddress,
  },
  walletProvider,
});

To deliver on another network, set dstChainKey and dstAddress to it, and take token from that network’s money market list. Build every amount from the token’s own decimals. withdraw and repay follow the same shape. Withdraw and borrow need no approval on any network; repaying with an ERC-20 needs an allowance, like supply.

Building a lending UI

sodax.moneyMarket.data exposes what you need for rates, positions, and health factors without extra indexing:

getReservesHumanized(): all reserves, human-readable.
getUserReservesHumanized(spokeChainKey, userAddress): a user’s positions.
formatReservesUSD(request) / formatUserSummary(request): USD-converted reserves and portfolio summaries.

Error handling

The module returns typed results. Discriminate on result.error.code ('RELAY_TIMEOUT', 'EXECUTION_FAILED', …) with structured context on result.error.context.

Full reference, including intent-only methods, gas estimation, and the per-method error-code table: Lend / Borrow (Money Market).

​Supply from Base

​Borrow to Base

​Building a lending UI

​Error handling

Supply from Base

Borrow to Base

Building a lending UI

Error handling