Proposal open contract

Trading

Auth Required

Get open contract details. The loginid parameter removed, response field types changed, and several display fields removed.

8 breaking changes - code updates required

Critical changes:

The loginid parameter has been removed from the request
Multiple response fields changed from number to string | number
The payout field changed from number to string
Several display and deprecated fields have been removed

Quick comparison

Aspect	Legacy	New	Action required
Endpoint ✅ Same	proposal_open_contract	proposal_open_contract	None
Auth Required ✅ Same	Yes	Yes	None
loginid Parameter ⚠️ Changed	Optional	Removed	Remove from requests
subscribe Values ⚠️ Changed	1 only	0 or 1	None (expanded)
Response Required Fields ⚠️ Changed	echo_req only	contract_id, contract_type, currency	Update type expectations

Breaking changes

1. loginid parameter removed

What changed: The loginid parameter has been removed from the request schema. This parameter was previously used when multiple tokens were provided during authorize.

Migration action: Remove the loginid parameter from your requests. Account selection is now handled differently.

2. subscribe parameter enum expanded

What changed: The subscribe parameter now accepts both 0 and 1, whereas legacy only accepted 1.

Migration action: No action required. This is a non-breaking expansion that allows explicitly disabling subscription.

3. Response field types changed

What changed: Several numeric fields now return string | number instead of just number:

bid_price: number → string | number
buy_price: number → string | number
current_spot: number → string | number
profit: number → string | number
payout: number → string (always string now)
sell_price: number → null | string
selected_spot: number → null | string

Migration action: Update your type definitions and parsing logic to handle both string and number values.

4. Required fields in response

What changed: The proposal_open_contract response object now has required fields: contract_id, contract_type, and currency.

Migration action: You can now rely on these fields always being present, simplifying null checks.

5. Display fields removed

What changed: Several display-specific fields have been removed:

display_value - the bid_price with correct precision
exit_tick_display_value
sell_spot_display_value (was already deprecated)

Migration action: Format numeric values on the client side using the currency precision.

6. Deprecated and display fields

What changed: The display-only field sell_spot_display_value has been removed. The sell_spot and sell_spot_time fields remain in v4 but are marked as deprecated and will be removed in a future API version.

sell_spot_display_value - removed in v4
sell_spot and sell_spot_time - still present in v4 but deprecated; migrate to exit_spot and exit_spot_time

7. is_forward_starting field removed

What changed: The is_forward_starting boolean flag has been removed.

Migration action: Determine forward-starting status by comparing purchase_time and date_start.

8. Snowball contract fields removed

What changed: Snowball contract-specific fields have been removed:

caution_price
profit_price
coupon_rate
coupon_collection_epochs
num_of_coupons
trade_risk_profile

New fields in v4

The following new fields are available in the v4 response:

exit_spot - Exit spot price (replaces deprecated sell_spot)
exit_spot_time - Epoch time of the exit spot (replaces deprecated sell_spot_time)
entry_spot_time - Epoch time of the entry spot
underlying_symbol - The underlying symbol code (alternative to underlying)

Request structure

Legacy Request Example

1{
2  "proposal_open_contract": 1,
3  "contract_id": 123456789,
4  "subscribe": 1,
5  "loginid": "CR90000001"
6}

New Request Example

1{
2  "proposal_open_contract": 1,
3  "contract_id": 123456789,
4  "subscribe": 1
5}

Note: The loginid parameter is no longer accepted in v4.

Response structure

Legacy Response Example

1{
2  "proposal_open_contract": {
3    "contract_id": 123456789,
4    "contract_type": "CALL",
5    "currency": "USD",
6    "buy_price": 10.50,
7    "bid_price": 15.50,
8    "current_spot": 1.0850,
9    "display_value": "15.50",
10    "display_name": "EUR/USD",
11    "is_forward_starting": 0,
12    "is_expired": 0,
13    "is_sold": 0,
14    "payout": 20.00,
15    "profit": 5.00,
16    "sell_spot": 1.0852,
17    "sell_spot_display_value": "1.0852",
18    "status": "open"
19  },
20  "msg_type": "proposal_open_contract"
21}

New Response Example

1{
2  "proposal_open_contract": {
3    "contract_id": 123456789,
4    "contract_type": "CALL",
5    "currency": "USD",
6    "buy_price": "10.50",
7    "bid_price": "15.50",
8    "current_spot": "1.0850",
9    "display_name": "EUR/USD",
10    "is_expired": 0,
11    "is_sold": 0,
12    "payout": "20.00",
13    "profit": "5.00",
14    "exit_spot": "1.0852",
15    "exit_spot_time": 1446629000,
16    "status": "open"
17  },
18  "msg_type": "proposal_open_contract"
19}

Note: Fields like display_value, is_forward_starting, and sell_spot_display_value are removed. sell_spot and sell_spot_time remain in v4 but are deprecated. Numeric fields may now return strings. display_name is still available.

Code examples

Legacy Implementation

1async function getOpenContract(contractId, loginId) {
2  const request = {
3    proposal_open_contract: 1,
4    contract_id: contractId,
5    subscribe: 1,
6    loginid: loginId // Optional for multi-token
7  };
8
9  ws.send(JSON.stringify(request));
10
11  ws.onmessage = (event) => {
12    const response = JSON.parse(event.data);
13    if (response.msg_type === 'proposal_open_contract') {
14      const contract = response.proposal_open_contract;
15      
16      // Numeric fields are always numbers
17      const profit = contract.profit;
18      const payout = contract.payout;
19      
20      // Display value available
21      const displayValue = contract.display_value;
22      
23      // Sell spot for sold contracts
24      const sellSpot = contract.sell_spot;
25    }
26  };
27}

New Implementation

1async function getOpenContract(contractId) {
2  const request = {
3    proposal_open_contract: 1,
4    contract_id: contractId,
5    subscribe: 1
6    // loginid no longer supported
7  };
8
9  ws.send(JSON.stringify(request));
10
11  ws.onmessage = (event) => {
12    const response = JSON.parse(event.data);
13    if (response.msg_type === 'proposal_open_contract') {
14      const contract = response.proposal_open_contract;
15      
16      // Handle string or number types
17      const profit = Number(contract.profit);
18      const payout = Number(contract.payout);
19      
20      // display_value removed - format manually
21      const displayValue = payout.toFixed(2);
22      
23      // Use exit_spot instead of sell_spot
24      const exitSpot = contract.exit_spot;
25    }
26  };
27}

TypeScript type handling

Legacy Types

1interface ProposalOpenContract {
2  contract_id: number;
3  contract_type: string;
4  currency: string;
5  buy_price: number;
6  bid_price: number;
7  current_spot: number;
8  payout: number;
9  profit: number;
10  sell_spot?: number;
11  display_value?: string;
12  is_forward_starting?: 0 | 1;
13  // ... other fields
14}

New Types

1interface ProposalOpenContract {
2  // Now required fields
3  contract_id: number;
4  contract_type: string;
5  currency: string;
6  
7  // Fields can be string or number
8  buy_price: string | number;
9  bid_price: string | number;
10  current_spot: string | number;
11  payout: string; // Always string now
12  profit: string | number;
13  
14  // New fields replace deprecated ones
15  exit_spot?: string | null;
16  exit_spot_time?: number | null;
17  entry_spot_time?: number | null;
18  underlying_symbol?: string;
19  // ... other fields
20}
21
22// Helper to safely parse numeric fields
23function toNumber(value: string | number): number {
24  return typeof value === 'string' 
25    ? parseFloat(value) 
26    : value;
27}

Proposal Sell