> For the complete documentation index, see [llms.txt](https://docs.ticko.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ticko.xyz/api-documentation/authentication/examples.md).

# Examples

### Placing Order Signing Example

This example signs `POST /v1/trade/orders` with Signing Type A. It uses Ticko Mainnet `domain.chainId = 84256` and omits `target_address`.

{% stepper %}
{% step %}

### Prepare the unsigned request body

```json
{
  "symbol_id": 100001,
  "is_buy": true,
  "order_type": "limit",
  "time_in_force": "gtc",
  "quantity": "1.0",
  "price": "67500.00",
  "position_side": "both",
  "margin_mode": "cross",
  "signer_address": "0xabc000000000000000000000000000000000def0",
  "nonce": 1719500000000,
  "expires_after": 1719500600000
}
```

{% endstep %}

{% step %}

### Build `business_fields` and `canonical_json`

For this endpoint, `business_fields` are the documented order fields:

```json
{
  "symbol_id": 100001,
  "is_buy": true,
  "order_type": "limit",
  "time_in_force": "gtc",
  "quantity": "1.0",
  "price": "67500.00",
  "position_side": "both",
  "margin_mode": "cross"
}
```

Sort keys alphabetically and serialize as compact JSON:

```json
{"is_buy":true,"margin_mode":"cross","order_type":"limit","position_side":"both","price":"67500.00","quantity":"1.0","symbol_id":100001,"time_in_force":"gtc"}
```

This string is `canonical_json`.
{% endstep %}

{% step %}

### Compute `actionHash`

`POST /v1/trade/orders` uses action tag `7`:

```
actionHash = keccak256(concat(uint8(7), utf8_bytes(canonical_json)))
```

{% endstep %}

{% step %}

### Build the Type A EIP-712 inputs

Because this request omits `target_address`, the `Agent` message does not include `targetAddress`.

```
domain = {
  name: "Ticko",
  version: "1",
  chainId: 84256,
  verifyingContract: "0x0000000000000000000000000000000000000000"
}

encodeType = "Agent(address signerAddress,bytes32 actionHash,uint64 nonce,uint64 expiresAfter)"

messageFields = [
  signerAddress = "0xabc000000000000000000000000000000000def0",
  actionHash = actionHash,
  nonce = 1719500000000,
  expiresAfter = 1719500600000
]
```

{% endstep %}

{% step %}

### Compute `signing_hash`

Apply the EIP-712 hashing rules to the Type A inputs:

```
domainType = "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"

domainSeparator = keccak256(concat(
  keccak256(utf8_bytes(domainType)),
  keccak256(utf8_bytes("Ticko")),
  keccak256(utf8_bytes("1")),
  pad32(84256),
  pad32(0x0000000000000000000000000000000000000000)
))

typeHash = keccak256(utf8_bytes(encodeType))

structHash = keccak256(concat(
  typeHash,
  pad32(0xabc000000000000000000000000000000000def0),
  actionHash,
  pad32(1719500000000),
  pad32(1719500600000)
))

signing_hash = keccak256(concat(
  "\x19\x01",
  domainSeparator,
  structHash
))
```

{% endstep %}

{% step %}

### Sign `signing_hash`

```
(v, r, s) = ecdsaSign(signing_hash, privateKey)
```

Use the private key for `signer_address`. Add the resulting values as `signature: { r, s, v }`.
{% endstep %}

{% step %}

### Submit the signed request

```json
{
  "symbol_id": 100001,
  "is_buy": true,
  "order_type": "limit",
  "time_in_force": "gtc",
  "quantity": "1.0",
  "price": "67500.00",
  "position_side": "both",
  "margin_mode": "cross",
  "signer_address": "0xabc000000000000000000000000000000000def0",
  "nonce": 1719500000000,
  "expires_after": 1719500600000,
  "signature": { "r": "0x...", "s": "0x...", "v": 28 }
}
```

{% endstep %}
{% endstepper %}

### Create Agent Key Signing Example

This example signs `POST /v1/account/approve-agent` with Signing Type B. Type B uses the wallet private key for `signer_address`; Agent keys cannot sign this request. `signature_chain_id` is `1`, so the EIP-712 domain uses `chainId = 1`.

{% stepper %}
{% step %}

### Prepare the unsigned request body

```json
{
  "ticko_chain": "Mainnet",
  "signature_chain_id": 1,
  "agent_address": "0x1111111111111111111111111111111111111111",
  "authorized_address": "0xabc000000000000000000000000000000000def0",
  "valid_days": 30,
  "label": "mm-bot-prod",
  "signer_address": "0xabc000000000000000000000000000000000def0",
  "nonce": 1719500000000,
  "expires_after": 1719500600000
}
```

{% endstep %}

{% step %}

### Build the Type B EIP-712 inputs

Use the `approve-agent` row in the Type B operation structs table:

```
domain = {
  name: "Ticko",
  version: "1",
  chainId: 1,
  verifyingContract: "0x0000000000000000000000000000000000000000"
}

encodeType = "ApproveAgent(address signerAddress,string tickoChain,address agentAddress,address authorizedAddress,uint32 validDays,string label,uint64 nonce,uint64 expiresAfter)"

messageFields = [
  signerAddress = "0xabc000000000000000000000000000000000def0",
  tickoChain = "Mainnet",
  agentAddress = "0x1111111111111111111111111111111111111111",
  authorizedAddress = "0xabc000000000000000000000000000000000def0",
  validDays = 30,
  label = "mm-bot-prod",
  nonce = 1719500000000,
  expiresAfter = 1719500600000
]
```

{% endstep %}

{% step %}

### Compute `signing_hash`

Apply the EIP-712 hashing rules to the Type B inputs:

```
domainType = "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"

domainSeparator = keccak256(concat(
  keccak256(utf8_bytes(domainType)),
  keccak256(utf8_bytes("Ticko")),
  keccak256(utf8_bytes("1")),
  pad32(1),
  pad32(0x0000000000000000000000000000000000000000)
))

typeHash = keccak256(utf8_bytes(encodeType))

structHash = keccak256(concat(
  typeHash,
  pad32(0xabc000000000000000000000000000000000def0),
  keccak256(utf8_bytes("Mainnet")),
  pad32(0x1111111111111111111111111111111111111111),
  pad32(0xabc000000000000000000000000000000000def0),
  pad32(30),
  keccak256(utf8_bytes("mm-bot-prod")),
  pad32(1719500000000),
  pad32(1719500600000)
))

signing_hash = keccak256(concat(
  "\x19\x01",
  domainSeparator,
  structHash
))
```

{% endstep %}

{% step %}

### Sign `signing_hash`

```
(v, r, s) = ecdsaSign(signing_hash, privateKey)
```

Use the wallet private key for `signer_address`. Add the resulting values as `signature: { r, s, v }`.
{% endstep %}

{% step %}

### Submit the signed request

```json
{
  "ticko_chain": "Mainnet",
  "signature_chain_id": 1,
  "agent_address": "0x1111111111111111111111111111111111111111",
  "authorized_address": "0xabc000000000000000000000000000000000def0",
  "valid_days": 30,
  "label": "mm-bot-prod",
  "signer_address": "0xabc000000000000000000000000000000000def0",
  "nonce": 1719500000000,
  "expires_after": 1719500600000,
  "signature": { "r": "0x...", "s": "0x...", "v": 28 }
}
```

{% endstep %}
{% endstepper %}


---

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