UpdateGlobalVar

Parameter Encode

feeAccount

Name	Rule
type	1 byte, 0x00
feeAccount	4 byte

5 bytes in total

insuranceFundAccount

Name	Rule
type	1 byte, 0x01
accountId	4 bytes

5 bytes in total

marginInfo

Name	Rule
type	1 byte, 0x02
marginId	1 bytes
tokenId	2 bytes, downcast to u16, then encode in big endian
ratio	1 byte

contractInfo

Name	Rule
type	1 byte, 0x03
pariId	1 bytes, downcast to u8 as 1 byte
symbol	15 bytes, expand to 15 bytes with 0x00 at the beginning
initialMarginRate	2 bytes
maintenanceMarginRate	2 bytes

fundingInfos

Name	Rule
type	1 byte, 0x04
infos	18 bytes * the length of fundingRates, encode fundingInfo in order

where fundingInfo encode rule is:

Name	Rule
pariId	1 bytes, downcast to u8 as 1 byte
price	15 bytes, refer to the Rust SDK pad_front method
fundingRate	2 bytes

18 bytes in total, where fundingRate encode is as following:

• Get the absolute result as u16 type，then encode as 2 bytes in big endian.

• If fundingRate < 0: bytes[0] |= 0b1000_0000

UpdateGlobalVar Encode

Name	Rule
type	1 byte, 0x0c
fromChainId	1 byte
subAccountId	4 bytes
parameter	refer to the Parameter encode
serialId	8 bytes

Example

With FundingInfo encode:

{
  "fromChainId": 1,
  "subAccountId": 1,
  "parameter": {
    "fundingInfos": {
      "infos": [
        {
          "pairId": 0,
          "price": "1000000000000000000",
          "fundingRate": 32767
        },
        {
          "pairId": 1,
          "price": "1000000000000000",
          "fundingRate": 0
        },
        {
          "pairId": 2,
          "price": "1000000000000",
          "fundingRate": -1
        },
        {
          "pairId": 3,
          "price": "1000000000",
          "fundingRate": 1
        }
      ]
    }
  },
  "serialId": 0
}
encode_bytes = [12, 1, 1, 4, 0, 0, 0, 0, 0, 0, 0, 0, 13, 224, 182, 179, 167, 100, 0, 0, 127, 255, 1, 0, 0, 0, 0, 0, 0, 0, 0, 3, 141, 126, 164, 198, 128, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 232, 212, 165, 16, 0, 128, 1, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 59, 154, 202, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0]

With FeeAccount encode:

{
  "fromChainId": 1,
  "subAccountId": 1,
  "parameter": {
    "feeAccount": {
      "accountId": 10
    }
  },
  "serialId": 0
}
encode_bytes = [12, 1, 1, 0, 0, 0, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0]

with insuranceFundAccount encode:

{
  "fromChainId": 1,
  "subAccountId": 1,
  "parameter": {
    "insuranceFundAccount": {
      "accountId": 9
    }
  },
  "serialId": 0
}
encode_bytes = [12, 1, 1, 1, 0, 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0]

With MarginInfo encode:

{
  "fromChainId": 1,
  "subAccountId": 1,
  "parameter": {
    "marginInfo": {
      "marginId": 1,
      "tokenId": 9,
      "ratio": 0
    }
  },
  "serialId": 0
}
encode_bytes = [12, 1, 1, 2, 1, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0]

With ContractInfo encode:

{
  "fromChainId": 1,
  "subAccountId": 1,
  "parameter": {
    "contractInfo": {
      "pairId": 2,
      "symbol": "BTCUSDC",
      "initialMarginRate": 6,
      "maintenanceMarginRate": 8
    }
  },
  "serialId": 0
}
encode_bytes = [12, 1, 1, 3, 2, 0, 0, 0, 0, 0, 0, 0, 0, 66, 84, 67, 85, 83, 68, 67, 0, 6, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0]