feat(task): add adaptor billing interface and async settlement framework

Add three billing lifecycle methods to the TaskAdaptor interface:
- EstimateBilling: compute OtherRatios from user request before pricing
- AdjustBillingOnSubmit: adjust ratios from upstream submit response
- AdjustBillingOnComplete: determine final quota at task terminal state

Introduce BaseBilling as embeddable no-op default for adaptors without
custom billing. Move Sora/Ali OtherRatios logic from shared validation
into per-adaptor EstimateBilling implementations.

Add TaskBillingContext to persist pricing params (model_price, group_ratio,
other_ratios) in task private data for async polling settlement.

Extract RecalculateTaskQuota as a general-purpose delta settlement
function and unify polling billing via settleTaskBillingOnComplete
(adaptor-first, then token-based fallback).

relay/channel/task/ali/adaptor.go

@@ -13,6 +13,7 @@ import (
 	"github.com/QuantumNous/new-api/logger"
 	"github.com/QuantumNous/new-api/model"
 	"github.com/QuantumNous/new-api/relay/channel"
+	"github.com/QuantumNous/new-api/relay/channel/task/taskcommon"
 	relaycommon "github.com/QuantumNous/new-api/relay/common"
 	"github.com/QuantumNous/new-api/service"
 	"github.com/samber/lo"
@@ -108,10 +109,10 @@ type AliMetadata struct {
 // ============================
 
 type TaskAdaptor struct {
+	taskcommon.BaseBilling
 	ChannelType int
 	apiKey      string
 	baseURL     string
-	aliReq      *AliVideoRequest
 }
 
 func (a *TaskAdaptor) Init(info *relaycommon.RelayInfo) {
@@ -121,17 +122,7 @@ func (a *TaskAdaptor) Init(info *relaycommon.RelayInfo) {
 }
 
 func (a *TaskAdaptor) ValidateRequestAndSetAction(c *gin.Context, info *relaycommon.RelayInfo) (taskErr *dto.TaskError) {
-	// 阿里通义万相支持 JSON 格式，不使用 multipart
-	var taskReq relaycommon.TaskSubmitReq
-	if err := common.UnmarshalBodyReusable(c, &taskReq); err != nil {
-		return service.TaskErrorWrapper(err, "unmarshal_task_request_failed", http.StatusBadRequest)
-	}
-	aliReq, err := a.convertToAliRequest(info, taskReq)
-	if err != nil {
-		return service.TaskErrorWrapper(err, "convert_to_ali_request_failed", http.StatusInternalServerError)
-	}
-	a.aliReq = aliReq
-	logger.LogJson(c, "ali video request body", aliReq)
+	// ValidateMultipartDirect 负责解析并将原始 TaskSubmitReq 存入 context
 	return relaycommon.ValidateMultipartDirect(c, info)
 }
 
@@ -148,11 +139,21 @@ func (a *TaskAdaptor) BuildRequestHeader(c *gin.Context, req *http.Request, info
 }
 
 func (a *TaskAdaptor) BuildRequestBody(c *gin.Context, info *relaycommon.RelayInfo) (io.Reader, error) {
-	bodyBytes, err := common.Marshal(a.aliReq)
+	taskReq, err := relaycommon.GetTaskRequest(c)
+	if err != nil {
+		return nil, errors.Wrap(err, "get_task_request_failed")
+	}
+
+	aliReq, err := a.convertToAliRequest(info, taskReq)
+	if err != nil {
+		return nil, errors.Wrap(err, "convert_to_ali_request_failed")
+	}
+	logger.LogJson(c, "ali video request body", aliReq)
+
+	bodyBytes, err := common.Marshal(aliReq)
 	if err != nil {
 		return nil, errors.Wrap(err, "marshal_ali_request_failed")
 	}
-
 	return bytes.NewReader(bodyBytes), nil
 }
 
@@ -335,19 +336,33 @@ func (a *TaskAdaptor) convertToAliRequest(info *relaycommon.RelayInfo, req relay
 		return nil, errors.New("can't change model with metadata")
 	}
 
-	info.PriceData.OtherRatios = map[string]float64{
+	return aliReq, nil
+}
+
+// EstimateBilling 根据用户请求参数计算 OtherRatios（时长、分辨率等）。
+// 在 ValidateRequestAndSetAction 之后、价格计算之前调用。
+func (a *TaskAdaptor) EstimateBilling(c *gin.Context, info *relaycommon.RelayInfo) map[string]float64 {
+	taskReq, err := relaycommon.GetTaskRequest(c)
+	if err != nil {
+		return nil
+	}
+
+	aliReq, err := a.convertToAliRequest(info, taskReq)
+	if err != nil {
+		return nil
+	}
+
+	otherRatios := map[string]float64{
 		"seconds": float64(aliReq.Parameters.Duration),
 	}
-
 	ratios, err := ProcessAliOtherRatios(aliReq)
 	if err != nil {
-		return nil, err
+		return otherRatios
 	}
-	for s, f := range ratios {
-		info.PriceData.OtherRatios[s] = f
+	for k, v := range ratios {
+		otherRatios[k] = v
 	}
-
-	return aliReq, nil
+	return otherRatios
 }
 
 // DoRequest delegates to common helper

relay/channel/task/doubao/adaptor.go

@@ -89,6 +89,7 @@ type responseTask struct {
 // ============================
 
 type TaskAdaptor struct {
+	taskcommon.BaseBilling
 	ChannelType int
 	apiKey      string
 	baseURL     string

relay/channel/task/gemini/adaptor.go

@@ -85,6 +85,7 @@ type operationResponse struct {
 // ============================
 
 type TaskAdaptor struct {
+	taskcommon.BaseBilling
 	ChannelType int
 	apiKey      string
 	baseURL     string

relay/channel/task/hailuo/adaptor.go

@@ -17,12 +17,14 @@ import (
 	"github.com/QuantumNous/new-api/constant"
 	"github.com/QuantumNous/new-api/dto"
 	"github.com/QuantumNous/new-api/relay/channel"
+	taskcommon "github.com/QuantumNous/new-api/relay/channel/task/taskcommon"
 	relaycommon "github.com/QuantumNous/new-api/relay/common"
 	"github.com/QuantumNous/new-api/service"
 )
 
 // https://platform.minimaxi.com/docs/api-reference/video-generation-intro
 type TaskAdaptor struct {
+	taskcommon.BaseBilling
 	ChannelType int
 	apiKey      string
 	baseURL     string

relay/channel/task/jimeng/adaptor.go

@@ -77,6 +77,7 @@ const (
 // ============================
 
 type TaskAdaptor struct {
+	taskcommon.BaseBilling
 	ChannelType int
 	accessKey   string
 	secretKey   string

relay/channel/task/kling/adaptor.go

@@ -97,6 +97,7 @@ type responsePayload struct {
 // ============================
 
 type TaskAdaptor struct {
+	taskcommon.BaseBilling
 	ChannelType int
 	apiKey      string
 	baseURL     string

relay/channel/task/sora/adaptor.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"strconv"
 	"strings"
 
 	"github.com/QuantumNous/new-api/common"
@@ -11,6 +12,7 @@ import (
 	"github.com/QuantumNous/new-api/dto"
 	"github.com/QuantumNous/new-api/model"
 	"github.com/QuantumNous/new-api/relay/channel"
+	taskcommon "github.com/QuantumNous/new-api/relay/channel/task/taskcommon"
 	relaycommon "github.com/QuantumNous/new-api/relay/common"
 	"github.com/QuantumNous/new-api/service"
 
@@ -56,6 +58,7 @@ type responseTask struct {
 // ============================
 
 type TaskAdaptor struct {
+	taskcommon.BaseBilling
 	ChannelType int
 	apiKey      string
 	baseURL     string
@@ -68,15 +71,15 @@ func (a *TaskAdaptor) Init(info *relaycommon.RelayInfo) {
 }
 
 func validateRemixRequest(c *gin.Context) *dto.TaskError {
-	var req struct {
-		Prompt string `json:"prompt"`
-	}
+	var req relaycommon.TaskSubmitReq
 	if err := common.UnmarshalBodyReusable(c, &req); err != nil {
 		return service.TaskErrorWrapperLocal(err, "invalid_request", http.StatusBadRequest)
 	}
 	if strings.TrimSpace(req.Prompt) == "" {
 		return service.TaskErrorWrapperLocal(fmt.Errorf("field prompt is required"), "invalid_request", http.StatusBadRequest)
 	}
+	// 存储原始请求到 context，与 ValidateMultipartDirect 路径保持一致
+	c.Set("task_request", req)
 	return nil
 }
 
@@ -87,6 +90,41 @@ func (a *TaskAdaptor) ValidateRequestAndSetAction(c *gin.Context, info *relaycom
 	return relaycommon.ValidateMultipartDirect(c, info)
 }
 
+// EstimateBilling 根据用户请求的 seconds 和 size 计算 OtherRatios。
+func (a *TaskAdaptor) EstimateBilling(c *gin.Context, info *relaycommon.RelayInfo) map[string]float64 {
+	// remix 路径的 OtherRatios 已在 ResolveOriginTask 中设置
+	if info.Action == constant.TaskActionRemix {
+		return nil
+	}
+
+	req, err := relaycommon.GetTaskRequest(c)
+	if err != nil {
+		return nil
+	}
+
+	seconds, _ := strconv.Atoi(req.Seconds)
+	if seconds == 0 {
+		seconds = req.Duration
+	}
+	if seconds <= 0 {
+		seconds = 4
+	}
+
+	size := req.Size
+	if size == "" {
+		size = "720x1280"
+	}
+
+	ratios := map[string]float64{
+		"seconds": float64(seconds),
+		"size":    1,
+	}
+	if size == "1792x1024" || size == "1024x1792" {
+		ratios["size"] = 1.666667
+	}
+	return ratios
+}
+
 func (a *TaskAdaptor) BuildRequestURL(info *relaycommon.RelayInfo) (string, error) {
 	if info.Action == constant.TaskActionRemix {
 		return fmt.Sprintf("%s/v1/videos/%s/remix", a.baseURL, info.OriginTaskID), nil

relay/channel/task/suno/adaptor.go

@@ -13,6 +13,7 @@ import (
 	"github.com/QuantumNous/new-api/constant"
 	"github.com/QuantumNous/new-api/dto"
 	"github.com/QuantumNous/new-api/relay/channel"
+	taskcommon "github.com/QuantumNous/new-api/relay/channel/task/taskcommon"
 	relaycommon "github.com/QuantumNous/new-api/relay/common"
 	"github.com/QuantumNous/new-api/service"
 
@@ -20,6 +21,7 @@ import (
 )
 
 type TaskAdaptor struct {
+	taskcommon.BaseBilling
 	ChannelType int
 }
 
@@ -79,10 +81,7 @@ func (a *TaskAdaptor) BuildRequestHeader(c *gin.Context, req *http.Request, info
 func (a *TaskAdaptor) BuildRequestBody(c *gin.Context, info *relaycommon.RelayInfo) (io.Reader, error) {
 	sunoRequest, ok := c.Get("task_request")
 	if !ok {
-		err := common.UnmarshalBodyReusable(c, &sunoRequest)
-		if err != nil {
-			return nil, err
-		}
+		return nil, fmt.Errorf("task_request not found in context")
 	}
 	data, err := common.Marshal(sunoRequest)
 	if err != nil {

relay/channel/task/taskcommon/helpers.go

@@ -5,7 +5,10 @@ import (
 	"fmt"
 
 	"github.com/QuantumNous/new-api/common"
+	"github.com/QuantumNous/new-api/model"
+	relaycommon "github.com/QuantumNous/new-api/relay/common"
 	"github.com/QuantumNous/new-api/setting/system_setting"
+	"github.com/gin-gonic/gin"
 )
 
 // UnmarshalMetadata converts a map[string]any metadata to a typed struct via JSON round-trip.
@@ -68,3 +71,25 @@ const (
 	ProgressInProgress = "30%"
 	ProgressComplete   = "100%"
 )
+
+// ---------------------------------------------------------------------------
+// BaseBilling — embeddable no-op implementations for TaskAdaptor billing methods.
+// Adaptors that do not need custom billing can embed this struct directly.
+// ---------------------------------------------------------------------------
+
+type BaseBilling struct{}
+
+// EstimateBilling returns nil (no extra ratios; use base model price).
+func (BaseBilling) EstimateBilling(_ *gin.Context, _ *relaycommon.RelayInfo) map[string]float64 {
+	return nil
+}
+
+// AdjustBillingOnSubmit returns nil (no submit-time adjustment).
+func (BaseBilling) AdjustBillingOnSubmit(_ *relaycommon.RelayInfo, _ []byte) map[string]float64 {
+	return nil
+}
+
+// AdjustBillingOnComplete returns 0 (keep pre-charged amount).
+func (BaseBilling) AdjustBillingOnComplete(_ *model.Task, _ *relaycommon.TaskInfo) int {
+	return 0
+}

relay/channel/task/vertex/adaptor.go

@@ -62,6 +62,7 @@ type operationResponse struct {
 // ============================
 
 type TaskAdaptor struct {
+	taskcommon.BaseBilling
 	ChannelType int
 	apiKey      string
 	baseURL     string
@@ -133,6 +134,28 @@ func (a *TaskAdaptor) BuildRequestHeader(c *gin.Context, req *http.Request, info
 	return nil
 }
 
+// EstimateBilling 根据用户请求中的 sampleCount 计算 OtherRatios。
+func (a *TaskAdaptor) EstimateBilling(c *gin.Context, _ *relaycommon.RelayInfo) map[string]float64 {
+	sampleCount := 1
+	v, ok := c.Get("task_request")
+	if ok {
+		req := v.(relaycommon.TaskSubmitReq)
+		if req.Metadata != nil {
+			if sc, exists := req.Metadata["sampleCount"]; exists {
+				if i, ok := sc.(int); ok && i > 0 {
+					sampleCount = i
+				}
+				if f, ok := sc.(float64); ok && int(f) > 0 {
+					sampleCount = int(f)
+				}
+			}
+		}
+	}
+	return map[string]float64{
+		"sampleCount": float64(sampleCount),
+	}
+}
+
 // BuildRequestBody converts request into Vertex specific format.
 func (a *TaskAdaptor) BuildRequestBody(c *gin.Context, info *relaycommon.RelayInfo) (io.Reader, error) {
 	v, ok := c.Get("task_request")
@@ -166,24 +189,6 @@ func (a *TaskAdaptor) BuildRequestBody(c *gin.Context, info *relaycommon.RelayIn
 		return nil, fmt.Errorf("sampleCount must be greater than 0")
 	}
 
-	// if req.Duration > 0 {
-	// 	body.Parameters["durationSeconds"] = req.Duration
-	// } else if req.Seconds != "" {
-	// 	seconds, err := strconv.Atoi(req.Seconds)
-	// 	if err != nil {
-	// 		return nil, errors.Wrap(err, "convert seconds to int failed")
-	// 	}
-	// 	body.Parameters["durationSeconds"] = seconds
-	// }
-
-	info.PriceData.OtherRatios = map[string]float64{
-		"sampleCount": float64(body.Parameters["sampleCount"].(int)),
-	}
-
-	// if v, ok := body.Parameters["durationSeconds"]; ok {
-	// 	info.PriceData.OtherRatios["durationSeconds"] = float64(v.(int))
-	// }
-
 	data, err := common.Marshal(body)
 	if err != nil {
 		return nil, err

relay/channel/task/vidu/adaptor.go

@@ -73,6 +73,7 @@ type creation struct {
 // ============================
 
 type TaskAdaptor struct {
+	taskcommon.BaseBilling
 	ChannelType int
 	baseURL     string
 }