THORChain Dev Docs
Aggreator Memos

Swap Memo (from here)

In order to support SwapOut DEX Aggregation feature , a few more field added into swap memo.
The whitelisted aggregator contract.
Can use the last x characters of the address to fuzz match it.
The final token (must be on 1INCH Whitelist)
Can be shortened
The parameter to pass into AmountOutMin in AMM contracts.
Handled by the aggregator, so:
1) Can be 0 (no protection). 2) Can be in any decimals. 3) Can be in % or BasisPoints, then converted to a price at the time of swap by the aggregator.

Additional ObserveTxIn field

In order to support SwapOut Dex Aggregation feature safely , a few more fields have been added into tx out item
"chain": "ETH",
"to_address": "0x3fd2d4ce97b082d4bce3f9fee2a3d60668d2f473",
"vault_pub_key": "tthorpub1addwnpepq02wq8hwgmwge6p9yzwscyfp0kjv823kres7l7tcv89nn2zfu3jguu5s4qa",
"coin": {
"asset": "ETH.ETH",
"amount": "19053206"
"memo": "OUT:EA7D80B3EB709319A6577AF6CF4DEFF67975D4F5A93CD8817E7FF04A048D1C5C",
"max_gas": [
"asset": "ETH.ETH",
"amount": "240000",
"decimals": 8
"gas_rate": 3,
"in_hash": "EA7D80B3EB709319A6577AF6CF4DEFF67975D4F5A93CD8817E7FF04A048D1C5C",
"aggregator": "0x69800327b38A4CeF30367Dec3f64c2f2386f3848", <-------------------- NEW
"aggregator_target_asset": "0x0a44986b70527154e9F4290eC14e5f0D1C861822", <-------------------- NEW
"aggregator_target_limit": "1000" <-------------------- NEW , but optional
Also the same fields have been added to ObservedTx so THORNode can verify that bifrost did send out the transaction per instruction, use the aggregator per instructed , and pass target asset and target limit to the aggregator correctly

How to swap out with dex aggregator?

If i want to swap RUNE to random ERC20 asset that is not list on THORChain , but is list on SushiSwap for example
thornode tx thorchain deposit 200000000000 RUNE '=:ETH.ETH:0x3fd2d4ce97b082d4bce3f9fee2a3d60668d2f473::::2386f3848:0x0a44986b70527154e9F4290eC14e5f0D1C861822' --chain-id thorchain --node tcp://$THORNODE_IP:26657 --from {from user} --keyring-backend=file --yes --gas 20000000
  1. 1.
    Swap asset is ETH.ETH
  2. 2.
    2386f3848 is the last nine characters of the aggregator contract address
  3. 3.
    0x0a44986b70527154e9F4290eC14e5f0D1C861822 is the final asset address
  4. 4.
    Keep in mind SwapOut is best effort, when aggregator contract failed to perform the requested swap , then user will get ETH.ETH instead of the final asset it request
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How to swap out with dex aggregator?