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A decentralized mining pool protocol on Ergo. Miners build their own blocks; contracts pay them for proven work.

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© 2026 Lithos Protocol. Open source under the MIT licence.λίθος — stone
Docs/Client API/Lithos Dex

Execute a swap

post/dex/swapapi_key

Sign and submit a swap that spends the pool directly. minOutput is required and rejects the trade if the pool has moved against you; send expectedPoolBoxId from the quote to get a 409 instead of a re-quote. POST /dex/orders/swap places the same swap as an order.

Request body

LDSwapExecuteRequest · application/json
  • amountInstringrequired

    Total handed to the pool, fees included. Decimal string.

  • ergInbooleanrequired
  • minOutputstringrequired

    Floor below which the swap must be rejected. Required, and must not be negative — a negative floor is no floor. Decimal string.

  • expectedPoolBoxIdstring

    Pool box the quote was made against. Returns 409 instead of re-quoting if it moved.

Responses

200Result of the swap transactionLDSwapResult▶
  • outcomestringrequired

    Node submission outcome; uncertain retains the known transaction ID and input ownership.

    one ofacceptedrejecteduncertain
  • amountOutstringrequired

    Amount received. Decimal string.

  • txIdstringrequired
400Malformed body, a non-positive `amountIn`, or a negative `minOutput`.ApiError▶
  • errorintegerrequired

    Error code

  • reasonstringrequired

    Error message explaining the reason of the error

  • detailstringrequirednullable

    Detailed error description

409The pool moved. Re-read and quote again.LDStateChangedResponse▶
  • errorintegerrequired
  • reasonstringrequired
  • detailstringrequired

    What moved, and what it moved to

  • poolBoxIdstring

    Current pool box id

  • vaultBoxIdstring

    Current vault box id

  • provisionBoxIdstring

    Current provision box id

422The pool cannot fill this swap, or the wallet cannot cover it.ApiError▶
  • errorintegerrequired

    Error code

  • reasonstringrequired

    Error message explaining the reason of the error

  • detailstringrequirednullable

    Detailed error description

503Node or wallet unavailable. Retry.ApiError▶
  • errorintegerrequired

    Error code

  • reasonstringrequired

    Error message explaining the reason of the error

  • detailstringrequirednullable

    Detailed error description

defaultErrorApiError▶
  • errorintegerrequired

    Error code

  • reasonstringrequired

    Error message explaining the reason of the error

  • detailstringrequirednullable

    Detailed error description

← PreviousQuote a swap by desired outputNext →Quote a liquidity deposit
Request
curl -X POST "http://localhost:9000/dex/swap" \
  -H "api_key: $LITHOS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "amountIn": "1000000000", "ergIn": true, "minOutput": "29974258", "expectedPoolBoxId": "a1f4c2e8b7d93052416fbc8e07d21935a8c4f60b2e91d7385c06a4b1f2e83d97" }'
Response
{
  "outcome": "accepted",
  "amountOut": "30124883",
  "txId": "40b7d045a858d537cdbf072e46ffbb86c0c9f6b0e93c369c1ffcba76797636d7"
}