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Split USDC into outcome positions

Splitting collateral produces a pair of ERC-1155 outcome tokens that represent the possible answers to a market question. On Polygon Amoy, this flow mirrors production so you can rehearse every allowance and signature step before promoting to mainnet.

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Prerequisites

  1. Hold testnet USDC on Amoy. You can mint from the official faucet.
  2. Approve the ConditionalTokens contract for the total amount you plan to split.
  3. Know the conditionId and the integer index set for the outcome you want to mint.

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Contract call

Call splitPosition(collateralToken, conditionId, partition, amount) where:
  • collateralToken is Amoy USDC.
  • conditionId is the 32-byte identifier you created via the oracle.
  • partition is [1, 2] for binary markets (yes/no). Multisided markets should pass more index sets.
  • amount is the collateral (in wei) to convert.
uint256[] memory partition = new uint256[](2);
partition[0] = 1; // yes
partition[1] = 2; // no

conditionalTokens.splitPosition(
  address(USDC),
  bytes32(conditionId),
  partition,
  amount
);
After the transaction confirms, you now hold ERC-1155 balances for each positionId. These balances can be deposited into the Forkast CLOB or pooled inside an FPMM.

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Operational tips

  • Always log the ConditionCreated and PositionSplit events emitted on Amoy so your backend remains in lockstep with on-chain IDs.
  • When batching multiple splits, increment allowances rather than re-approving for every call; Polygon gas costs favor fewer approvals.
  • Splitting is reversible: you can mergePositions at any time before resolution to recover the original collateral 1:1 (minus gas).