Builder Code

All trades on Pear Protocol are routed through the Pear Protocol builder address:

0xA47D4d99191db54A4829cdf3de2417E527c3b042

Before making any trades, users must approve the Pear Protocol builder address to charge fees. This is a one-time approval per wallet done directly on Hyperliquid.

How It Works

Hyperliquid's builder fee system allows builders (like Pear Protocol) to charge a fee on each order routed through their address. Users must explicitly approve a maximum fee rate for each builder they interact with.

Approving the Builder Fee

Send an approveBuilderFee action to the Hyperliquid exchange endpoint. This requires an EIP-712 signature from the user's wallet.

Payload to sign:

{
  "type": "approveBuilderFee",
  "hyperliquidChain": "Mainnet",
  "signatureChainId": "0xa4b1",
  "maxFeeRate": "0.01%",
  "builder": "0xA47D4d99191db54A4829cdf3de2417E527c3b042",
  "nonce": 1234567890
}

Field	Description
type	Must be "approveBuilderFee"
hyperliquidChain	"Mainnet" or "Testnet"
signatureChainId	"0xa4b1" (Arbitrum)
maxFeeRate	Maximum fee rate the builder can charge (e.g. "0.01%")
builder	Pear Protocol builder address
nonce	Current timestamp in milliseconds

Reference

See the Hyperliquid docs for full details on the exchange endpoint and builder fee approval: https://hyperliquid.gitbook.io/hyperliquid-docs/for-developers/api/exchange-endpoint#approve-a-builder-fee