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Requesting Bitcoin-specific information via the API

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Chains

curl --request GET \
     --url 'https://li.quest/v1/chains?chainTypes=UTXO' \
     --header 'accept: application/json'

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Tools

curl --request GET \
  --url 'https://li.quest/v1/tools?chains=20000000000001' \
  --header 'accept: application/json'

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Tokens

curl --request GET \
     --url 'https://li.quest/v1/tokens?chains=BTC' \
     --header 'accept: application/json'

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Token details

curl --request GET \
     --url 'https://li.quest/v1/token?chain=20000000000001&token=bitcoin' \
     --header 'accept: application/json'

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Requesting a Quote

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Bitcoin to Ethereum

The quote and route request to LI.FI API is the same structure with respective variables for chain and token address 
curl --request GET \
     --url 'https://li.quest/v1/quote?fromAddress=bc1qmdpxhzarlxrygtvlxrkkl0eqguszkzqdgg4py5&fromAmount=500000&fromChain=BTC&fromToken=bitcoin&toAddress=0x39333638696578786b61393361726b63717a6773&toChain=1&toToken=0x0000000000000000000000000000000000000000' \
     --header 'accept: application/json'

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Ethereum to Bitcoin

curl --request GET \
     --url 'https://li.quest/v1/quote?fromChain=1&toChain=20000000000001&fromToken=0x0000000000000000000000000000000000000000&toToken=bitcoin&fromAddress=0x552008c0f6870c2f77e5cC1d2eb9bdff03e30Ea0&toAddress=bc1qmdpxhzarlxrygtvlxrkkl0eqguszkzqdgg4py5&fromAmount=500000000000000000' \
     --header 'accept: application/json'

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Executing the transaction

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Transaction Data

BTC to Ethereum, Avalanche, or BNB Smart Chain (BSC) After retrieving the quote, the funds need to be sent to the BTC vault address provided in the response, along with a memo. Memo Functionality: Similar to Thorchain, LI.FI uses memos for BTC to EVM swaps. The memo in the BTC transaction specifies the swap’s destination address and chain. Transaction Handling: The transaction that leaves BTC and goes to EVM needs to be sent to an EVM address. The memo ensures that the swap details are correctly processed by the validators.
NOTE: Only send tx n a timely manner (30min), it is always recommended to request an up-to-date quote to ensure to get the latest information.
The following is an example of transaction data 
"transactionRequest": {
    "to": "bc1qawcdxplxprc64fh38ryy4crndmfgwrffpac743", //thorswap vault to send BTC to
    "data": "=:ETH.USDC:0x29DaCdF7cCaDf4eE67c923b4C22255A4B2494eD7::lifi:0|0x4977d81c2a5d6bd8",
    "value": "500000"
  }