fix(go): improve error handling when fetching anchor feeds

examples/developer-hub-go/flare/fetch_anchor_feeds.go

@@ -5,20 +5,20 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"log"
 	"net/http"
 )
 
 const (
 	BaseURL = "https://flr-data-availability.flare.network/"
-	APIKey  = "api-key"
+	ApiKey  = "<your-api-key>"
 )
 
-var FeedIDs = []string{
+var FeedIds = []string{
 	"0x01464c522f55534400000000000000000000000000", // FLR/USD
 	"0x014254432f55534400000000000000000000000000", // BTC/USD
 	"0x014554482f55534400000000000000000000000000", // ETH/USD
 }
+var VotingRoundId = ""
 
 type AnchorFeed struct {
 	Body struct {
@@ -31,46 +31,28 @@ type AnchorFeed struct {
 	Proof []string `json:"proof"`
 }
 
-func anchorFeeds(feedIds []string, votingRoundId string) ([]AnchorFeed, error) {
+func FetchAnchorFeeds() ([]AnchorFeed, error) {
 	url := BaseURL + "api/v0/ftso/anchor-feeds-with-proof"
-	if votingRoundId != "" {
-		url += "?voting_round_id=" + votingRoundId
+	if VotingRoundId != "" {
+		url += "?voting_round_id=" + VotingRoundId
 	}
 
-	payload, _ := json.Marshal(map[string]interface{}{"feed_ids": feedIds})
-
+	payload, _ := json.Marshal(map[string]interface{}{"feed_ids": FeedIds})
 	req, _ := http.NewRequest("POST", url, bytes.NewBuffer(payload))
-
-	req.Header.Set("X-API-KEY", APIKey)
+	req.Header.Set("X-API-KEY", ApiKey)
 	req.Header.Set("Content-Type", "application/json")
 
 	resp, err := http.DefaultClient.Do(req)
-	if err != nil {
-		return nil, fmt.Errorf("failed to perform HTTP request: %w", err)
+	if err != nil || resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("request failed: %v (status: %d)", err, resp.StatusCode)
 	}
 	defer resp.Body.Close()
 
-	if resp.StatusCode != http.StatusOK {
-		body, _ := io.ReadAll(resp.Body)
-		return nil, fmt.Errorf("unexpected status code %d: %s", resp.StatusCode, string(body))
-	}
-
-	responseBody, _ := io.ReadAll(resp.Body)
-
-	var feeds []AnchorFeed
-	if err := json.Unmarshal(responseBody, &feeds); err != nil {
-		return nil, fmt.Errorf("failed to unmarshal JSON response: %w", err)
-	}
-
-	return feeds, nil
-
-}
-
-func FetchAnchorFeeds() {
-	feeds, err := anchorFeeds(FeedIDs, "")
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
-		log.Fatalf("Error fetching anchor feeds: %v", err)
+		return nil, fmt.Errorf("failed to read response: %w", err)
 	}
-	fmt.Printf("%+v\n", feeds)
 
+	var feeds []AnchorFeed
+	return feeds, json.Unmarshal(body, &feeds)
 }

examples/developer-hub-go/go.mod

@@ -7,7 +7,6 @@ require github.com/ethereum/go-ethereum v1.14.12
 require (
 	github.com/Microsoft/go-winio v0.6.2 // indirect
 	github.com/bits-and-blooms/bitset v1.20.0 // indirect
-	github.com/btcsuite/btcd/btcec/v2 v2.3.4 // indirect
 	github.com/consensys/bavard v0.1.24 // indirect
 	github.com/consensys/gnark-crypto v0.14.0 // indirect
 	github.com/crate-crypto/go-ipa v0.0.0-20240724233137-53bbb0ceb27a // indirect

examples/developer-hub-go/go.sum

@@ -6,14 +6,8 @@ github.com/VictoriaMetrics/fastcache v1.12.2 h1:N0y9ASrJ0F6h0QaC3o6uJb3NIZ9VKLjC
 github.com/VictoriaMetrics/fastcache v1.12.2/go.mod h1:AmC+Nzz1+3G2eCPapF6UcsnkThDcMsQicp4xDukwJYI=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/bits-and-blooms/bitset v1.14.3 h1:Gd2c8lSNf9pKXom5JtD7AaKO8o7fGQ2LtFj1436qilA=
-github.com/bits-and-blooms/bitset v1.14.3/go.mod h1:7hO7Gc7Pp1vODcmWvKMRA9BNmbv6a/7QIWpPxHddWR8=
 github.com/bits-and-blooms/bitset v1.20.0 h1:2F+rfL86jE2d/bmw7OhqUg2Sj/1rURkBn3MdfoPyRVU=
 github.com/bits-and-blooms/bitset v1.20.0/go.mod h1:7hO7Gc7Pp1vODcmWvKMRA9BNmbv6a/7QIWpPxHddWR8=
-github.com/btcsuite/btcd/btcec/v2 v2.3.4 h1:3EJjcN70HCu/mwqlUsGK8GcNVyLVxFDlWurTXGPFfiQ=
-github.com/btcsuite/btcd/btcec/v2 v2.3.4/go.mod h1:zYzJ8etWJQIv1Ogk7OzpWjowwOdXY1W/17j2MW85J04=
-github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 h1:q0rUy8C/TYNBQS1+CGKw68tLOFYSNEs0TFnxxnS9+4U=
-github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
 github.com/cespare/cp v0.1.0 h1:SE+dxFebS7Iik5LK0tsi1k9ZCxEaFX4AjQmoyA+1dJk=
 github.com/cespare/cp v0.1.0/go.mod h1:SOGHArjBr4JWaSDEVpWpo/hNg6RoKrls6Oh40hiwW+s=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
@@ -30,8 +24,6 @@ github.com/cockroachdb/redact v1.1.5 h1:u1PMllDkdFfPWaNGMyLD1+so+aq3uUItthCFqzwP
 github.com/cockroachdb/redact v1.1.5/go.mod h1:BVNblN9mBWFyMyqK1k3AAiSxhvhfK2oOZZ2lK+dpvRg=
 github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06 h1:zuQyyAKVxetITBuuhv3BI9cMrmStnpT18zmgmTxunpo=
 github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06/go.mod h1:7nc4anLGjupUW/PeY5qiNYsdNXj7zopG+eqsS7To5IQ=
-github.com/consensys/bavard v0.1.22 h1:Uw2CGvbXSZWhqK59X0VG/zOjpTFuOMcPLStrp1ihI0A=
-github.com/consensys/bavard v0.1.22/go.mod h1:k/zVjHHC4B+PQy1Pg7fgvG3ALicQw540Crag8qx+dZs=
 github.com/consensys/bavard v0.1.24 h1:Lfe+bjYbpaoT7K5JTFoMi5wo9V4REGLvQQbHmatoN2I=
 github.com/consensys/bavard v0.1.24/go.mod h1:k/zVjHHC4B+PQy1Pg7fgvG3ALicQw540Crag8qx+dZs=
 github.com/consensys/gnark-crypto v0.14.0 h1:DDBdl4HaBtdQsq/wfMwJvZNE80sHidrK3Nfrefatm0E=
@@ -44,8 +36,6 @@ github.com/crate-crypto/go-kzg-4844 v1.1.0 h1:EN/u9k2TF6OWSHrCCDBBU6GLNMq88OspHH
 github.com/crate-crypto/go-kzg-4844 v1.1.0/go.mod h1:JolLjpSff1tCCJKaJx4psrlEdlXuJEC996PL3tTAFks=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/deckarep/golang-set/v2 v2.6.0 h1:XfcQbWM1LlMB8BsJ8N9vW5ehnnPVIw0je80NsVHagjM=
-github.com/deckarep/golang-set/v2 v2.6.0/go.mod h1:VAky9rY/yGXJOLEDv3OMci+7wtDpOF4IN+y82NBOac4=
 github.com/deckarep/golang-set/v2 v2.7.0 h1:gIloKvD7yH2oip4VLhsv3JyLLFnC0Y2mlusgcvJYW5k=
 github.com/deckarep/golang-set/v2 v2.7.0/go.mod h1:VAky9rY/yGXJOLEDv3OMci+7wtDpOF4IN+y82NBOac4=
 github.com/decred/dcrd/crypto/blake256 v1.0.1 h1:7PltbUIQB7u/FfZ39+DGa/ShuMyJ5ilcvdfma9wOH6Y=
@@ -54,20 +44,12 @@ github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0 h1:rpfIENRNNilwHwZeG5+P150SMrnN
 github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0/go.mod h1:v57UDF4pDQJcEfFUCRop3lJL149eHGSe9Jvczhzjo/0=
 github.com/ethereum/c-kzg-4844 v1.0.3 h1:IEnbOHwjixW2cTvKRUlAAUOeleV7nNM/umJR+qy4WDs=
 github.com/ethereum/c-kzg-4844 v1.0.3/go.mod h1:VewdlzQmpT5QSrVhbBuGoCdFJkpaJlO1aQputP83wc0=
-github.com/ethereum/go-ethereum v1.14.11 h1:8nFDCUUE67rPc6AKxFj7JKaOa2W/W1Rse3oS6LvvxEY=
-github.com/ethereum/go-ethereum v1.14.11/go.mod h1:+l/fr42Mma+xBnhefL/+z11/hcmJ2egl+ScIVPjhc7E=
 github.com/ethereum/go-ethereum v1.14.12 h1:8hl57x77HSUo+cXExrURjU/w1VhL+ShCTJrTwcCQSe4=
 github.com/ethereum/go-ethereum v1.14.12/go.mod h1:RAC2gVMWJ6FkxSPESfbshrcKpIokgQKsVKmAuqdekDY=
-github.com/ethereum/go-verkle v0.1.1-0.20240829091221-dffa7562dbe9 h1:8NfxH2iXvJ60YRB8ChToFTUzl8awsc3cJ8CbLjGIl/A=
-github.com/ethereum/go-verkle v0.1.1-0.20240829091221-dffa7562dbe9/go.mod h1:M3b90YRnzqKyyzBEWJGqj8Qff4IDeXnzFw0P9bFw3uk=
 github.com/ethereum/go-verkle v0.2.2 h1:I2W0WjnrFUIzzVPwm8ykY+7pL2d4VhlsePn4j7cnFk8=
 github.com/ethereum/go-verkle v0.2.2/go.mod h1:M3b90YRnzqKyyzBEWJGqj8Qff4IDeXnzFw0P9bFw3uk=
-github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
-github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
 github.com/fsnotify/fsnotify v1.8.0 h1:dAwr6QBTBZIkG8roQaJjGof0pp0EeF+tNV7YBP3F/8M=
 github.com/fsnotify/fsnotify v1.8.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
-github.com/gballet/go-libpcsclite v0.0.0-20190607065134-2772fd86a8ff h1:tY80oXqGNY4FhTFhk+o9oFHGINQ/+vhlm8HFzi6znCI=
-github.com/gballet/go-libpcsclite v0.0.0-20190607065134-2772fd86a8ff/go.mod h1:x7DCsMOv1taUwEWCzT4cmDeAkigA5/QCwUodaVOe8Ww=
 github.com/getsentry/sentry-go v0.27.0 h1:Pv98CIbtB3LkMWmXi4Joa5OOcwbmnX88sF5qbK3r3Ps=
 github.com/getsentry/sentry-go v0.27.0/go.mod h1:lc76E2QywIyW8WuBnwl8Lc4bkmQH4+w1gwTf25trprY=
 github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
@@ -77,9 +59,8 @@ github.com/gofrs/flock v0.8.1 h1:+gYjHKf32LDeiEEFhQaotPbLuUXjY5ZqxKgXy7n59aw=
 github.com/gofrs/flock v0.8.1/go.mod h1:F1TvTiK9OcQqauNUHlbJvyl9Qa1QvF/gOUDKA14jxHU=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
-github.com/golang-jwt/jwt/v4 v4.5.0 h1:7cYmW1XlMY7h7ii7UhUyChSgS5wUJEnm9uZVTGqOWzg=
-github.com/golang-jwt/jwt/v4 v4.5.0/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w39/MY0Ch0=
 github.com/golang-jwt/jwt/v4 v4.5.1 h1:JdqV9zKUdtaa9gdPlywC3aeoEsR681PlKC+4F5gQgeo=
+github.com/golang-jwt/jwt/v4 v4.5.1/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w39/MY0Ch0=
 github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
 github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/golang/snappy v0.0.5-0.20220116011046-fa5810519dcb h1:PBC98N2aIaM3XXiurYmW7fx4GZkL8feAMVq7nEjURHk=
@@ -97,8 +78,6 @@ github.com/holiman/billy v0.0.0-20240216141850-2abb0c79d3c4 h1:X4egAf/gcS1zATw6w
 github.com/holiman/billy v0.0.0-20240216141850-2abb0c79d3c4/go.mod h1:5GuXa7vkL8u9FkFuWdVvfR5ix8hRB7DbOAaYULamFpc=
 github.com/holiman/bloomfilter/v2 v2.0.3 h1:73e0e/V0tCydx14a0SCYS/EWCxgwLZ18CZcZKVu0fao=
 github.com/holiman/bloomfilter/v2 v2.0.3/go.mod h1:zpoh+gs7qcpqrHr3dB55AMiJwo0iURXE7ZOP9L9hSkA=
-github.com/holiman/uint256 v1.3.1 h1:JfTzmih28bittyHM8z360dCjIA9dbPIBlcTI6lmctQs=
-github.com/holiman/uint256 v1.3.1/go.mod h1:EOMSn4q6Nyt9P6efbI3bueV4e1b3dGlUCXeiRV4ng7E=
 github.com/holiman/uint256 v1.3.2 h1:a9EgMPSC1AAaj1SZL5zIQD3WbwTuHrMGOerLjGmM/TA=
 github.com/holiman/uint256 v1.3.2/go.mod h1:EOMSn4q6Nyt9P6efbI3bueV4e1b3dGlUCXeiRV4ng7E=
 github.com/huin/goupnp v1.3.0 h1:UvLUlWDNpoUdYzb2TCn+MuTWtcjXKSza2n6CBdQ0xXc=
@@ -154,8 +133,6 @@ github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/shirou/gopsutil v3.21.11+incompatible h1:+1+c1VGhc88SSonWP6foOcLhvnKlUeu/erjjvaPEYiI=
 github.com/shirou/gopsutil v3.21.11+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
-github.com/status-im/keycard-go v0.2.0 h1:QDLFswOQu1r5jsycloeQh3bVU8n/NatHHaZobtDnDzA=
-github.com/status-im/keycard-go v0.2.0/go.mod h1:wlp8ZLbsmrF6g6WjugPAx+IzoLrkdf9+mHxBEeo3Hbg=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/supranational/blst v0.3.13 h1:AYeSxdOMacwu7FBmpfloBz5pbFXDmJL33RuwnKtmTjk=
@@ -166,35 +143,24 @@ github.com/tklauser/go-sysconf v0.3.14 h1:g5vzr9iPFFz24v2KZXs/pvpvh8/V9Fw6vQK5ZZ
 github.com/tklauser/go-sysconf v0.3.14/go.mod h1:1ym4lWMLUOhuBOPGtRcJm7tEGX4SCYNEEEtghGG/8uY=
 github.com/tklauser/numcpus v0.9.0 h1:lmyCHtANi8aRUgkckBgoDk1nHCux3n2cgkJLXdQGPDo=
 github.com/tklauser/numcpus v0.9.0/go.mod h1:SN6Nq1O3VychhC1npsWostA+oW+VOQTxZrS604NSRyI=
-github.com/tyler-smith/go-bip39 v1.1.0 h1:5eUemwrMargf3BSLRRCalXT93Ns6pQJIjYQN2nyfOP8=
-github.com/tyler-smith/go-bip39 v1.1.0/go.mod h1:gUYDtqQw1JS3ZJ8UWVcGTGqqr6YIN3CWg+kkNaLt55U=
 github.com/urfave/cli/v2 v2.25.7 h1:VAzn5oq403l5pHjc4OhD54+XGO9cdKVL/7lDjF+iKUs=
 github.com/urfave/cli/v2 v2.25.7/go.mod h1:8qnjx1vcq5s2/wpsqoZFndg2CE5tNFyrTvS6SinrnYQ=
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
 github.com/yusufpapurcu/wmi v1.2.4 h1:zFUKzehAFReQwLys1b/iSMl+JQGSCSjtVqQn9bBrPo0=
 github.com/yusufpapurcu/wmi v1.2.4/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
-golang.org/x/crypto v0.28.0 h1:GBDwsMXVQi34v5CCYUm2jkJvu4cbtru2U4TN2PSyQnw=
-golang.org/x/crypto v0.28.0/go.mod h1:rmgy+3RHxRZMyY0jjAJShp2zgEdOqj2AO7U0pYmeQ7U=
 golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
 golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
-golang.org/x/exp v0.0.0-20241009180824-f66d83c29e7c h1:7dEasQXItcW1xKJ2+gg5VOiBnqWrJc+rq0DPKyvvdbY=
-golang.org/x/exp v0.0.0-20241009180824-f66d83c29e7c/go.mod h1:NQtJDoLvd6faHhE7m4T/1IY708gDefGGjR/iUW8yQQ8=
 golang.org/x/exp v0.0.0-20241217172543-b2144cdd0a67 h1:1UoZQm6f0P/ZO0w1Ri+f+ifG/gXhegadRdwBIXEFWDo=
 golang.org/x/exp v0.0.0-20241217172543-b2144cdd0a67/go.mod h1:qj5a5QZpwLU2NLQudwIN5koi3beDhSAlJwa67PuM98c=
-golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
-golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
 golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
-golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
 golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.19.0 h1:kTxAhCbGbxhK0IwgSKiMO5awPoDQ0RpfiVYBfK860YM=
-golang.org/x/text v0.19.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
 golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
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 golang.org/x/time v0.5.0 h1:o7cqy6amK/52YcAKIPlM3a+Fpj35zvRj2TP+e1xFSfk=
 golang.org/x/time v0.5.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
 google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=