Fix alignment in README

I am not sure if this will detect when an item failed because a payment is required, but this brings @nitter back online.

README.md

@@ -1,14 +1,11 @@
 # snappy
 
-<div style="text-align: center">
-
+<p align="center">
 <img src="https://stacker.news/favicon.png" width="64" height="64" />
 <img src="https://go.dev/blog/go-brand/Go-Logo/PNG/Go-Logo_Blue.png" width="64" height="64" />
+</p>
 
-[stacker.news](https://stacker.news) API client package for Go
-
-</div>
-
+<p align="center">A Go client for the <a href="https://stacker.news" target="_blank">Stacker News</a> GraphQL API</p>
 
 ## How to use
 

client.go

@@ -23,14 +23,21 @@ func NewClient(options ...func(*Client)) *Client {
 	}
 
 	// set defaults
+	var ok bool
 	if c.BaseUrl == "" {
-		c.BaseUrl = "https://stacker.news"
+		c.BaseUrl, ok = os.LookupEnv("SN_BASE_URL")
+		if !ok {
+			c.BaseUrl = "https://stacker.news"
+		}
 	}
 	if c.ApiKey == "" {
 		c.ApiKey = os.Getenv("SN_API_KEY")
 	}
 	if c.MediaUrl == "" {
-		c.MediaUrl = "https://m.stacker.news"
+		c.MediaUrl, ok = os.LookupEnv("SN_MEDIA_URL")
+		if !ok {
+			c.MediaUrl = "https://m.stacker.news"
+		}
 	}
 	c.ApiUrl = fmt.Sprintf("%s/api/graphql", c.BaseUrl)
 
@@ -100,3 +107,22 @@ func (c *Client) checkForErrors(err []GqlError) error {
 	}
 	return nil
 }
+
+func (c *Client) checkForPayInErrors(payIn PayIn) error {
+	privates := payIn.PayerPrivates
+	if privates.PayInFailureReason != "" {
+		return fmt.Errorf("mutation failed: %s", privates.PayInFailureReason)
+	}
+
+	bolt11 := privates.PayInBolt11
+	if bolt11.Id != 0 {
+		return fmt.Errorf("mutation failed: bolt11 payment required")
+	}
+
+	result := privates.Result
+	if result.Id == 0 {
+		return fmt.Errorf("mutation failed: no result id")
+	}
+
+	return nil
+}

items.go

@@ -61,30 +61,37 @@ type ItemsResponse struct {
 	} `json:"data"`
 }
 
-type ItemPaidAction struct {
-	Result        Item          `json:"result"`
-	Invoice       Invoice       `json:"invoice"`
-	PaymentMethod PaymentMethod `json:"paymentMethod"`
+type PayIn struct {
+	Id            int `json:"id"`
+	PayerPrivates struct {
+		PayInFailureReason string `json:"payInFailureReason"`
+		PayInBolt11        struct {
+			Id int `json:"id"`
+		} `json:"payInBolt11"`
+		Result struct {
+			Id int `json:"id,string"`
+		} `json:"result"`
+	} `json:"payerPrivates"`
 }
 
 type UpsertDiscussionResponse struct {
 	Errors []GqlError `json:"errors"`
 	Data   struct {
-		UpsertDiscussion ItemPaidAction `json:"upsertDiscussion"`
+		UpsertDiscussion PayIn `json:"upsertDiscussion"`
 	} `json:"data"`
 }
 
 type UpsertLinkResponse struct {
 	Errors []GqlError `json:"errors"`
 	Data   struct {
-		UpsertLink ItemPaidAction `json:"upsertLink"`
+		UpsertLink PayIn `json:"upsertLink"`
 	} `json:"data"`
 }
 
 type UpsertCommentResponse struct {
 	Errors []GqlError `json:"errors"`
 	Data   struct {
-		UpsertComment ItemPaidAction `json:"upsertComment"`
+		UpsertComment PayIn `json:"upsertComment"`
 	} `json:"data"`
 }
 
@@ -226,7 +233,18 @@ func (c *Client) PostDiscussion(title string, text string, sub string) (int, err
 		Query: `
 		mutation upsertDiscussion($title: String!, $text: String, $sub: String) {
 			upsertDiscussion(title: $title, text: $text, sub: $sub) {
-				result { id }
+				id
+				payerPrivates {
+					payInFailureReason
+					payInBolt11 {
+						id
+					}
+					result {
+						... on Item {
+							id
+						}
+					}
+				}
 			}
 		}`,
 		Variables: map[string]interface{}{
@@ -254,7 +272,13 @@ func (c *Client) PostDiscussion(title string, text string, sub string) (int, err
 		return -1, err
 	}
 
-	return respBody.Data.UpsertDiscussion.Result.Id, nil
+	payIn := respBody.Data.UpsertDiscussion
+	err = c.checkForPayInErrors(payIn)
+	if err != nil {
+		return -1, err
+	}
+
+	return payIn.PayerPrivates.Result.Id, nil
 }
 
 func (c *Client) PostLink(url string, title string, text string, sub string) (int, error) {
@@ -262,7 +286,18 @@ func (c *Client) PostLink(url string, title string, text string, sub string) (in
 		Query: `
 		mutation upsertLink($url: String!, $title: String!, $text: String, $sub: String!) {
 			upsertLink(url: $url, title: $title, text: $text, sub: $sub) {
-				result { id }
+				id
+				payerPrivates {
+					payInFailureReason
+					payInBolt11 {
+						id
+					}
+					result {
+						... on Item {
+							id
+						}
+					}
+				}
 			}
 		}`,
 		Variables: map[string]interface{}{
@@ -291,7 +326,13 @@ func (c *Client) PostLink(url string, title string, text string, sub string) (in
 		return -1, err
 	}
 
-	return respBody.Data.UpsertLink.Result.Id, nil
+	payIn := respBody.Data.UpsertLink
+	err = c.checkForPayInErrors(payIn)
+	if err != nil {
+		return -1, err
+	}
+
+	return payIn.PayerPrivates.Result.Id, nil
 }
 
 func (c *Client) CreateComment(parentId int, text string) (int, error) {
@@ -299,7 +340,18 @@ func (c *Client) CreateComment(parentId int, text string) (int, error) {
 		Query: `
 		mutation upsertComment($parentId: ID!, $text: String!) {
 			upsertComment(parentId: $parentId, text: $text) {
-				result { id }
+				id
+				payerPrivates {
+					payInFailureReason
+					payInBolt11 {
+						id
+					}
+					result {
+						... on Item {
+							id
+						}
+					}
+				}
 			}
 		}`,
 		Variables: map[string]interface{}{
@@ -326,7 +378,13 @@ func (c *Client) CreateComment(parentId int, text string) (int, error) {
 		return -1, err
 	}
 
-	return respBody.Data.UpsertComment.Result.Id, nil
+	payIn := respBody.Data.UpsertComment
+	err = c.checkForPayInErrors(payIn)
+	if err != nil {
+		return -1, err
+	}
+
+	return payIn.PayerPrivates.Result.Id, nil
 }
 
 func (c *Client) Dupes(url string) (*[]Dupe, error) {