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EIP-712 signed requests for Aster Futures API v3. Nonce, signature payload, request format. Use when calling TRADE, USER_DATA, USER_STREAM, or MARKET_DATA.
Codex 또는 Claude로 설치 이 Prompt를 복사해 Codex, Claude 또는 다른 어시스턴트에 붙여 넣으면 Skill 페이지를 검토하고 설치를 진행할 수 있습니다.
SOC 직업 분류 기준
Deposit funds to Aster from a wallet; private key from env. Use when the user wants to deposit to Aster or fund an Aster account.
Account, balances, user trades, spot–futures transfer, withdraw, API key for Aster Spot API v1. Use when reading/updating spot account or transferring. Signed; see aster-api-spot-auth-v1.
Account, balances, user trades, spot–futures transfer, withdraw, API key for Aster Spot Testnet API v3. Use when reading/updating spot testnet account or transferring. Signed; see aster-api-spot-auth-v3.
HMAC SHA256 signed requests for Aster Spot API v1 (main). Base sapi.asterdex.com, /api/v1/. Use when calling TRADE, USER_DATA, or USER_STREAM. Signed; algorithm same as aster-api-auth-v1.
EIP-712 signed requests for Aster Spot Testnet API v3. Base sapi.asterdex-testnet.com, /api/v3/. Use when calling TRADE, USER_DATA, USER_STREAM, or MARKET_DATA on spot testnet. Algorithm same as aster-api-auth-v3.
Error codes, rate limits, 429/418 handling for Aster Spot API v1. Use when handling spot API errors or building rate-aware clients.
| name | aster-api-auth-v3 |
| description | EIP-712 signed requests for Aster Futures API v3. Nonce, signature payload, request format. Use when calling TRADE, USER_DATA, USER_STREAM, or MARKET_DATA. |
Base: https://fapi.asterdex.com. Signed: send timestamp (ms), signature; optional recvWindow (default 5000, ≤5000).
| Param | Description |
|---|---|
| user | Main account wallet |
| signer | API wallet |
| nonce | Current time, microseconds |
| signature | EIP-712 (hex) |
Nonce: Current system time in µs; invalid if ±~5s. Prefer monotonic (e.g. now_s×1e6 + sequence). Example: see reference.
Signing: (1) Param string: key=value, sort ASCII, all strings; include nonce, user, signer. (2) EIP-712: domain name "AsterSignTransaction", version "1", chainId 1666, verifyingContract "0x0000...0000"; type "Message", field "msg" = param string. (3) Encode typed data, sign with API wallet private key (ECDSA), hex. (4) Add signature to query or body; POST/DELETE: application/x-www-form-urlencoded. Security: Env vars for user, signer, key. GET /fapi/v3/time if clock skew.
Note on chainId 1666 (SEC-08): The chainId 1666 used in the EIP-712 signing domain is an off-chain signing identifier specific to AsterDex. It is NOT the Harmony ONE network chainId, even though Harmony uses the same number. This chainId is used exclusively for API request signing and has no relation to the on-chain deposit chainId (ETH=1, BSC=56, Arbitrum=42161). Do not confuse the two.
Payload shapes: reference.md.
