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  • Read precompiles (testnet only)
  • Write system contract (testnet only)
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Interacting with HyperCore

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Last updated 13 days ago

Read precompiles (testnet only)

The testnet EVM provides read precompiles that allows querying HyperCore information. The precompile addresses start at 0x0000000000000000000000000000000000000800 and have methods for querying information such as perps positions, spot balances, vault equity, staking delegations, oracle prices, and the L1 block number.

The values are guaranteed to match the latest HyperCore state at the time the EVM block is constructed.

Attached is a Solidity file L1Read.sol describing the read precompiles. As an example, this call queries the third perp oracle price on testnet:

cast call 0x0000000000000000000000000000000000000807 0x0000000000000000000000000000000000000000000000000000000000000003 --rpc-url https://rpc.hyperliquid-testnet.xyz/evm

To convert to floating point numbers, divide the returned price by 10^(6 - szDecimals)for perps and 10^(8 - base asset szDecimals) for spot.

Precompiles called on invalid inputs such as invalid assets or vault address will return an error and consume all gas passed into the precompile call frame. Precompiles have a gas cost of 2000 + 65 * output_len.

Write system contract (testnet only)

A system contract is available at 0x3333333333333333333333333333333333333333 for sending transactions from the HyperEVM to HyperCore. It supports sending IOC orders, vault transfers, staking, sending spot, and transferring between spot and perps. A solidity file L1Write.sol for the write system contract is attached.

Happy building. Any feedback is appreciated.

6KB
L1Read.sol
2KB
L1Write.sol