add AgentResolver #40
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| package resolvers | ||
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| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "io" | ||
| "net/http" | ||
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| "github.com/gofrs/uuid/v5" | ||
| "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 | ||
| } | ||
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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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| 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.NewV4() | ||
|
There was a problem hiding this comment. use github.com/google/uuid to generate uuid |
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| if err != nil { | ||
| return out, err | ||
| } | ||
| threadUUID, err := uuid.NewV4() | ||
| if err != nil { | ||
| return out, err | ||
| } | ||
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| 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) | ||
| } | ||
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| iden3commMsg, err := r.config.PackageManager.Pack(packers.MediaTypePlainMessage, bytesMsg, nil) | ||
| if err != nil { | ||
| return out, errors.WithStack(err) | ||
| } | ||
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| resp, err := http.DefaultClient.Post(status.ID, "application/json", bytes.NewBuffer(iden3commMsg)) | ||
|
There was a problem hiding this comment. pass the http client as option |
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| if err != nil { | ||
| return out, errors.WithStack(err) | ||
| } | ||
| defer func() { | ||
| err2 := resp.Body.Close() | ||
| if err != nil { | ||
|
There was a problem hiding this comment. if err2 != nil? There was a problem hiding this comment. just return revocationStatus.RevocationStatus, err in the end of the function |
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| err = errors.WithStack(err2) | ||
| } | ||
| }() | ||
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| if resp.StatusCode != http.StatusOK { | ||
|
There was a problem hiding this comment. Accept range of 2xx codes. There was a problem hiding this comment. 200 is expected on all other clients. |
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| 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, nil | ||
| } | ||
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Can we use an options pattern? Or if it required field pass the PackageManager directly to
NewAgentResolverconstructor?There was a problem hiding this comment.
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no, it looks like you missed our discussions