post
https://api.testnet.rise.trade/v1/orders/place
Submit order to on-chain book. Gas sponsored by API service.
Signature: Signer signs VerifySignature with hash = keccak256(encodedOrderData)
Order Encoding (47 bytes):
bytes[0:8] = marketId (uint64, big-endian)
bytes[8:24] = size (uint128, big-endian)
bytes[24:40] = price (uint128, big-endian)
bytes[40] = flags: bit0=side, bit1=postOnly, bit2=reduceOnly, bit3-4=stpMode
bytes[41] = orderType (0=Limit, 1=Market)
bytes[42] = timeInForce (0=GTC, 1=GTT, 2=FOK, 3=IOC)
bytes[43:47] = expiry (uint32, big-endian)