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Splitting converts USDC.e collateral into a full (position) set of outcome tokens. For every $1 USDC.e you split, you receive 1 Yes token and 1 No token. 
$100 USDC.e → 100 Yes tokens + 100 No tokens

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Prerequisites

Before splitting, ensure you have:
  1. USDC.e balance on Polygon
  2. USDC.e approval for the CTF contract to spend your tokens
  3. Condition ID of the market — the condition must already be prepared on the CTF contract (via prepareCondition)
If the partition is trivial, invalid, or refers to more slots than the condition is prepared with, the transaction will revert.

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How It Works

  1. You approve the CTF contract to spend your USDC.e
  2. You call splitPosition() with the amount and market details
  3. The CTF contract transfers USDC.e from your wallet and mints both outcome tokens
The operation is atomic — if any step fails, the entire transaction reverts.

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Function Parameters

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collateralToken
IERC20
USDC.e (Bridged USDC) contract address: 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174
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parentCollectionId
bytes32
Always 0x0000...0000 (32 zero bytes) for Polymarket markets
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conditionId
bytes32
The market’s condition ID, available from the Markets API
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partition
uint[]
Array of index sets: [1, 2] for binary markets (Yes = 1, No = 2)
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amount
uint256
The amount of collateral or stake to split. Also the number of full sets to receive.

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Next Steps

Merge Tokens

Convert token pairs back to USDC.e

Trade on Orderbook

Place orders using your newly split tokens