Etherdrake
0b425ae5d2
- 249 files updated to match live docs.polymarket.com - 14 URLs now return 404 (removed from live docs, local copies retained) - New changelog entry: GET /markets and /events keyset pagination (Apr 10, 2026)
62 lines
1.9 KiB
Markdown
62 lines
1.9 KiB
Markdown
# Merge Tokens
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> Convert outcome token pairs back to USDC.e
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**Merging** is the inverse of splitting — it converts a full set of outcome tokens back into USDC.e collateral. For every 1 Yes token and 1 No token you merge, you receive \$1 USDC.e. The condition must already be prepared on the CTF contract (via `prepareCondition`).
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```
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100 Yes tokens + 100 No tokens → $100 USDC.e
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```
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## Prerequisites
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Before merging, you need:
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1. **Equal amounts** of both Yes and No tokens
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2. **Condition ID** of the market
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3. **Sufficient gas** for the transaction
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## How It Works
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1. You call `mergePositions()` with the amount and market details
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2. One unit of each position in a full set is burned in return for 1 collateral unit
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3. The CTF contract releases USDC.e back to your wallet
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The operation is atomic — if you don't have enough of both tokens, the transaction reverts.
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## Function Parameters
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<ResponseField name="collateralToken" type="IERC20">
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USDC.e (Bridged USDC) contract address: `0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174`
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</ResponseField>
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<ResponseField name="parentCollectionId" type="bytes32">
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Always `0x0000...0000` (32 zero bytes) for Polymarket markets
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</ResponseField>
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<ResponseField name="conditionId" type="bytes32">
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The market's condition ID, available from the Markets API
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</ResponseField>
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<ResponseField name="partition" type="uint[]">
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Array of index sets: `[1, 2]` for binary markets
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</ResponseField>
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<ResponseField name="amount" type="uint256">
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The number of full sets to merge. Also the amount of collateral to receive.
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</ResponseField>
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## Next Steps
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<CardGroup cols={2}>
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<Card title="Redeem Tokens" icon="hand-holding-dollar" href="/trading/ctf/redeem">
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Exchange winning tokens for USDC.e after resolution
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</Card>
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<Card title="CTF Overview" icon="book" href="/trading/ctf/overview">
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Learn more about the Conditional Token Framework
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</Card>
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</CardGroup>
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