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npm install viem-deal[![npm package][npm-img]][npm-url]
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Easily deal arbitrary amounts of any ERC20 tokens to any account on any setStorageAt-compatible network, including in hardhat, tevm, or anvil-based forks!
> NB: deal is the name of a cheat code introduced by foundry, which "mints" without actually minting ERC20 tokens - it's overriding the storage of the balance of the given recipient
The storage slot of the mapping balanceOf is retrieved via eth_createAccessList and the given user's balance is manipulated via setStorageAt.
> [!WARNING]
> The package is known to have unexpected side effects when used to deal dust of stETH... Be careful!
``bash`
npm install viem-deal
`bash`
yarn add viem-deal
`typescript
import { createTestClient, http } from 'viem';
import { foundry } from 'viem/chains';
import { dealActions } from 'viem-deal';
const client = createTestClient({
mode: 'anvil',
chain: foundry,
transport: http(),
}).extend(dealActions);
// Deal 100 USDC to test address.
await client.deal({
erc20: "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
recipient: "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266",
amount: parseUnits("100", 6),
});
``
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