71 lines
2.3 KiB
Go
71 lines
2.3 KiB
Go
package graphql
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import (
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"context"
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"errors"
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"fmt"
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"time"
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"github.com/evcc-io/evcc/util"
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"github.com/evcc-io/evcc/util/request"
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"github.com/golang-jwt/jwt/v5"
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"github.com/hasura/go-graphql-client"
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"golang.org/x/oauth2"
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)
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// ErrAuthFailed indicates the Kraken API rejected the supplied credentials.
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// Callers should treat this as permanent and stop retrying to avoid account lockouts.
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var ErrAuthFailed = errors.New("authentication failed")
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type tokenSource struct {
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log *util.Logger
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baseURI string
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email, password string
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}
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var _ oauth2.TokenSource = (*tokenSource)(nil)
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// RefreshToken implements oauth.TokenRefresher to obtain a new JWT token.
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// It parses the JWT to extract the actual expiry time from the token claims.
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func (ts *tokenSource) Token() (*oauth2.Token, error) {
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ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
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defer cancel()
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// Create a temporary client without authentication for the token request
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cli := request.NewClient(ts.log)
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tempClient := graphql.NewClient(ts.baseURI, cli)
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var q krakenTokenAuthentication
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if err := tempClient.Mutate(ctx, &q, map[string]any{
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"email": ts.email,
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"password": ts.password,
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}); err != nil {
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// Any GraphQL error response from obtainKrakenToken is an application-level
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// rejection (bad credentials, account locked, etc.) — repeating the request
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// will not change the outcome and continued retries can lock the account.
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// Network/transport failures don't surface as graphql.Errors and stay
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// transient via the wrapped path below.
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if _, ok := errors.AsType[graphql.Errors](err); ok {
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return nil, fmt.Errorf("%w: %v", ErrAuthFailed, err)
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}
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return nil, fmt.Errorf("authentication failed: %w", err)
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}
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// Parse JWT to extract expiry time using RegisteredClaims
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// We use ParseUnverified since we don't have the signing key and trust the token from the API
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var claims jwt.RegisteredClaims
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if _, _, err := jwt.NewParser(jwt.WithoutClaimsValidation()).ParseUnverified(q.ObtainKrakenToken.Token, &claims); err != nil {
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return nil, fmt.Errorf("failed to parse JWT: %w", err)
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}
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// Extract expiry from JWT claims
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expiry := time.Now().Add(time.Hour)
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if claims.ExpiresAt != nil {
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expiry = claims.ExpiresAt.Time
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}
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return &oauth2.Token{
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AccessToken: q.ObtainKrakenToken.Token,
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Expiry: expiry,
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}, nil
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}
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