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client: api-types: Add exact output amount specifiers in external ord…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "math/big" | ||
| "os" | ||
|
|
||
| "github.com/renegade-fi/golang-sdk/client/api_types" | ||
| external_match_client "github.com/renegade-fi/golang-sdk/client/external_match_client" | ||
| "github.com/renegade-fi/golang-sdk/wallet" | ||
| ) | ||
|
|
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| func main() { | ||
| // Get API credentials from environment | ||
| apiKey := os.Getenv("EXTERNAL_MATCH_KEY") | ||
| apiSecret := os.Getenv("EXTERNAL_MATCH_SECRET") | ||
| if apiKey == "" || apiSecret == "" { | ||
| panic("EXTERNAL_MATCH_KEY and EXTERNAL_MATCH_SECRET must be set") | ||
| } | ||
|
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| apiSecretKey, err := new(wallet.HmacKey).FromBase64String(apiSecret) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
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| externalMatchClient := external_match_client.NewTestnetExternalMatchClient(apiKey, &apiSecretKey) | ||
|
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| // Fetch token mappings from the relayer | ||
| quoteMint, err := findTokenAddr("USDC", externalMatchClient) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| baseMint, err := findTokenAddr("WETH", externalMatchClient) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
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| // Create an order that specifies we want exactly 0.1 WETH out, net of fees | ||
| // We're willing to spend up to 200 USDC for this amount | ||
| quoteAmountOut := new(big.Int).SetUint64(20_000_000) // $200 USDC max spend | ||
|
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| order, err := api_types.NewExternalOrderBuilder(). | ||
| WithQuoteMint(quoteMint). | ||
| WithBaseMint(baseMint). | ||
| WithExactQuoteAmountOutput(api_types.Amount(*quoteAmountOut)). | ||
| WithSide("Sell"). | ||
| Build() | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
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| if err := getQuoteWithExactAmount(order, externalMatchClient); err != nil { | ||
| panic(err) | ||
| } | ||
| } | ||
|
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| // getQuoteAndSubmit gets a quote, assembles it, then submits the bundle | ||
| func getQuoteWithExactAmount(order *api_types.ApiExternalOrder, client *external_match_client.ExternalMatchClient) error { | ||
| // 1. Get a quote from the relayer | ||
| fmt.Println("Getting quote...") | ||
| quote, err := client.GetExternalMatchQuote(order) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if quote == nil { | ||
| fmt.Println("No quote found") | ||
| return nil | ||
| } | ||
|
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| // Print the quote details | ||
| fmt.Printf("Quote found!\n") | ||
| fmt.Printf("You will send: %v %s\n", quote.Quote.Send.Amount, quote.Quote.Send.Mint) | ||
| fmt.Printf("You will receive (net of fees): %v %s\n", quote.Quote.Receive.Amount, quote.Quote.Receive.Mint) | ||
| fmt.Printf("Total fees: %v\n", quote.Quote.Fees.Total()) | ||
|
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| // You can now assemble the quote and submit a bundle, see `01_external_match` for an example | ||
| return nil | ||
| } | ||
|
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| // ----------- | ||
| // | Helpers | | ||
| // ----------- | ||
|
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| func findTokenAddr(symbol string, client *external_match_client.ExternalMatchClient) (string, error) { | ||
| tokens, err := client.GetSupportedTokens() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
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| for _, token := range tokens { | ||
| if token.Symbol == symbol { | ||
| return token.Address, nil | ||
| } | ||
| } | ||
|
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| return "", fmt.Errorf("token not found") | ||
| } |