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* add Agent resolver * upgrade go-schema-processor/v2 to 2.3.0 * rm gofrs package --------- Co-authored-by: Oleg Lomaka <oleg.lomaka@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| package resolvers | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "io" | ||
| "net/http" | ||
|
|
||
| "github.com/google/uuid" | ||
| "github.com/iden3/go-iden3-core/v2/w3c" | ||
| "github.com/iden3/go-schema-processor/v2/verifiable" | ||
| "github.com/iden3/iden3comm/v2" | ||
| "github.com/iden3/iden3comm/v2/packers" | ||
| "github.com/iden3/iden3comm/v2/protocol" | ||
| "github.com/pkg/errors" | ||
| ) | ||
|
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| type ctxKeySenderDID struct{} | ||
|
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| // WithSenderDID puts the user DID in the context | ||
| func WithSenderDID(ctx context.Context, userDID *w3c.DID) context.Context { | ||
| return context.WithValue(ctx, ctxKeySenderDID{}, userDID) | ||
| } | ||
|
|
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| // GetSenderDID extract the sender's DID from the context. | ||
| // Returns nil if nothing is found. | ||
| func GetSenderDID(ctx context.Context) *w3c.DID { | ||
| v := ctx.Value(ctxKeySenderDID{}) | ||
| if v == nil { | ||
| return nil | ||
| } | ||
| return v.(*w3c.DID) | ||
| } | ||
|
|
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| // AgentResolverConfig options for credential status verification | ||
| type AgentResolverConfig struct { | ||
| PackageManager *iden3comm.PackageManager | ||
| CustomHTTPClient *http.Client | ||
| } | ||
|
|
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| // AgentResolver is a struct that allows to interact with the issuer's agent to get revocation status. | ||
| type AgentResolver struct { | ||
| config AgentResolverConfig | ||
| } | ||
|
|
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| // NewAgentResolver returns new agent resolver | ||
| func NewAgentResolver(config AgentResolverConfig) *AgentResolver { | ||
| return &AgentResolver{config} | ||
| } | ||
|
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| // Resolve is a method to resolve a credential status from an agent. | ||
| func (r AgentResolver) Resolve(ctx context.Context, | ||
| status verifiable.CredentialStatus) (out verifiable.RevocationStatus, err error) { | ||
|
|
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| if status.Type != verifiable.Iden3commRevocationStatusV1 { | ||
| return out, errors.New("invalid status type") | ||
| } | ||
| revocationBody := protocol.RevocationStatusRequestMessageBody{ | ||
| RevocationNonce: status.RevocationNonce, | ||
| } | ||
| rawBody, err := json.Marshal(revocationBody) | ||
| if err != nil { | ||
| return out, errors.WithStack(err) | ||
| } | ||
|
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| idUUID, err := uuid.NewV7() | ||
| if err != nil { | ||
| return out, errors.WithStack(err) | ||
| } | ||
| threadUUID, err := uuid.NewV7() | ||
| if err != nil { | ||
| return out, errors.WithStack(err) | ||
| } | ||
|
|
||
| senderDID := GetSenderDID(ctx) | ||
| if senderDID == nil { | ||
| return out, errors.New("sender DID not found in the context") | ||
| } | ||
| issuerDID := verifiable.GetIssuerDID(ctx) | ||
| if issuerDID == nil { | ||
| return out, errors.New("issuer DID not found in the context") | ||
| } | ||
| msg := iden3comm.BasicMessage{ | ||
| ID: idUUID.String(), | ||
| ThreadID: threadUUID.String(), | ||
| From: senderDID.String(), | ||
| To: issuerDID.String(), | ||
| Type: protocol.RevocationStatusRequestMessageType, | ||
| Body: rawBody, | ||
| } | ||
| bytesMsg, err := json.Marshal(msg) | ||
| if err != nil { | ||
| return out, errors.WithStack(err) | ||
| } | ||
|
|
||
| iden3commMsg, err := r.config.PackageManager.Pack(packers.MediaTypePlainMessage, bytesMsg, nil) | ||
| if err != nil { | ||
| return out, errors.WithStack(err) | ||
| } | ||
|
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| httpClient := http.DefaultClient | ||
| if r.config.CustomHTTPClient != nil { | ||
| httpClient = r.config.CustomHTTPClient | ||
| } | ||
|
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| resp, err := httpClient.Post(status.ID, "application/json", bytes.NewBuffer(iden3commMsg)) | ||
| if err != nil { | ||
| return out, errors.WithStack(err) | ||
| } | ||
| defer func() { | ||
| err2 := resp.Body.Close() | ||
| if err == nil { | ||
| err = errors.WithStack(err2) | ||
| } | ||
| }() | ||
|
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| statusOK := resp.StatusCode >= 200 && resp.StatusCode < 300 | ||
| if !statusOK { | ||
| return out, errors.Errorf("bad status code: %d", resp.StatusCode) | ||
| } | ||
|
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| b, err := io.ReadAll(resp.Body) | ||
| if err != nil { | ||
| return out, errors.WithStack(err) | ||
| } | ||
|
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| basicMessage, _, err := r.config.PackageManager.Unpack(b) | ||
| if err != nil { | ||
| return out, errors.WithStack(err) | ||
| } | ||
|
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| if basicMessage.Type != protocol.RevocationStatusResponseMessageType { | ||
| return out, errors.Errorf("unexpected message type: %s", basicMessage.Type) | ||
| } | ||
|
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| var revocationStatus protocol.RevocationStatusResponseMessageBody | ||
| if err = json.Unmarshal(basicMessage.Body, &revocationStatus); err != nil { | ||
| return out, errors.WithStack(err) | ||
| } | ||
|
|
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| return revocationStatus.RevocationStatus, err | ||
| } |
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