create log scale market, validation

common/new-contract.ts

@@ -28,7 +28,8 @@ export function getNewContract(
   // used for numeric markets
   bucketCount: number,
   min: number,
-  max: number
+  max: number,
+  isLogScale: boolean
 ) {
   const tags = parseTags(
     `${question} ${description} ${extraTags.map((tag) => `#${tag}`).join(' ')}`
@@ -39,7 +40,7 @@ export function getNewContract(
     outcomeType === 'BINARY'
       ? getBinaryCpmmProps(initialProb, ante) // getBinaryDpmProps(initialProb, ante)
       : outcomeType === 'PSEUDO_NUMERIC'
-      ? getPseudoNumericCpmmProps(initialProb, ante, min, max, false)
+      ? getPseudoNumericCpmmProps(initialProb, ante, min, max, isLogScale)
       : outcomeType === 'NUMERIC'
       ? getNumericProps(ante, bucketCount, min, max)
       : getFreeAnswerProps(ante)

functions/src/create-contract.ts

@@ -49,21 +49,25 @@ const numericSchema = z.object({
   min: z.number(),
   max: z.number(),
   initialValue: z.number(),
+  isLogScale: z.boolean().optional(),
 })
 
 export const createmarket = newEndpoint(['POST'], async (req, auth) => {
   const { question, description, tags, closeTime, outcomeType, groupId } =
     validate(bodySchema, req.body)
 
-  let min, max, initialProb
+  let min, max, initialProb, isLogScale
 
   if (outcomeType === 'PSEUDO_NUMERIC' || outcomeType === 'NUMERIC') {
     let initialValue
-    ;({ min, max, initialValue } = validate(numericSchema, req.body))
+    ;({ min, max, initialValue, isLogScale } = validate(
+      numericSchema,
+      req.body
+    ))
     if (max - min <= 0.01 || initialValue < min || initialValue > max)
       throw new APIError(400, 'Invalid range.')
 
-    initialProb = (initialValue - min) / (max - min) * 100
+    initialProb = ((initialValue - min) / (max - min)) * 100
   }
   if (outcomeType === 'BINARY') {
     ;({ initialProb } = validate(binarySchema, req.body))
@@ -127,7 +131,8 @@ export const createmarket = newEndpoint(['POST'], async (req, auth) => {
     tags ?? [],
     NUMERIC_BUCKET_COUNT,
     min ?? 0,
-    max ?? 0
+    max ?? 0,
+    isLogScale ?? false
   )
 
   if (ante) await chargeUser(user.id, ante, true)

web/pages/create.tsx

@@ -76,9 +76,12 @@ export function NewContract(props: { question: string; groupId?: string }) {
 
   const [outcomeType, setOutcomeType] = useState<outcomeType>('BINARY')
   const [initialProb] = useState(50)
+
   const [minString, setMinString] = useState('')
   const [maxString, setMaxString] = useState('')
+  const [isLogScale, setIsLogScale] = useState(false)
   const [initialValueString, setInitialValueString] = useState('')
+
   const [description, setDescription] = useState('')
   // const [tagText, setTagText] = useState<string>(tag ?? '')
   // const tags = parseWordsAsTags(tagText)
@@ -174,6 +177,7 @@ export function NewContract(props: { question: string; groupId?: string }) {
           min,
           max,
           initialValue,
+          isLogScale,
           groupId: selectedGroup?.id,
           tags: category ? [category] : undefined,
         })
@@ -260,12 +264,36 @@ export function NewContract(props: { question: string; groupId?: string }) {
                 placeholder="MAX"
                 onClick={(e) => e.stopPropagation()}
                 onChange={(e) => setMaxString(e.target.value)}
+                onBlur={() => {
+                  if (min === undefined || max === undefined) return
+                  const lengthDiff = Math.abs(
+                    maxString.length - minString.length
+                  )
+                  if (lengthDiff > 2) {
+                    setIsLogScale(true)
+                  }
+                }}
                 min={Number.MIN_SAFE_INTEGER}
                 max={Number.MAX_SAFE_INTEGER}
                 disabled={isSubmitting}
                 value={maxString}
               />
             </Row>
+
+            <Row className="mt-1 ml-2 mb-2 items-center">
+              <span className="mr-2 text-sm">Log scale</span>{' '}
+              <input
+                type="checkbox"
+                checked={isLogScale}
+                onChange={() => setIsLogScale(!isLogScale)}
+              />
+            </Row>
+
+            {min !== undefined && max !== undefined && min >= max && (
+              <div className="mt-2 mb-2 text-sm text-red-500">
+                The maximum value must be greater than the minimum.
+              </div>
+            )}
           </div>
           <div className="form-control mb-2 items-start">
             <label className="label gap-2">
@@ -285,6 +313,16 @@ export function NewContract(props: { question: string; groupId?: string }) {
                 value={initialValueString ?? ''}
               />
             </Row>
+
+            {initialValue !== undefined &&
+              min !== undefined &&
+              max !== undefined &&
+              min < max &&
+              (initialValue < min || initialValue > max) && (
+                <div className="mt-2 mb-2 text-sm text-red-500">
+                  Initial value must be in between {min} and {max}.{' '}
+                </div>
+              )}
           </div>
         </>
       )}