diff --git a/src/components/earn/EarnForm.tsx b/src/components/earn/EarnForm.tsx
index 3c03f3d7..6b1fffa8 100644
--- a/src/components/earn/EarnForm.tsx
+++ b/src/components/earn/EarnForm.tsx
@@ -13,6 +13,7 @@ import { Tabs, TabsContent } from '@/components/ui/tabs'
 import * as JAM from '@/constants/jam'
 import type { OfferType } from '@/constants/jm'
 import { cn, factorToPercentage } from '@/lib/utils'
+import type { AmountSats } from '@/types/global'
 import { SatSymbol } from '../CurrencySymbol'
 
 const FieldPrefixSatSymbol = (
@@ -30,9 +31,9 @@ const OFFERTYPE_REL: OfferType = 'sw0reloffer'
 
 export interface EarnFormValues {
   offerType: OfferType
-  offerAbsoluteFee?: number
+  offerAbsoluteFee?: AmountSats
   offerRelativeFeeInPercent?: number
-  offerMinAmount: number
+  offerMinAmount: AmountSats
 }
 
 const FORM_INPUT_DEFAULT_VALUES: Required<EarnFormValues> = {
@@ -99,7 +100,7 @@ interface EarnFormProps {
   isWaitingMakerStart: boolean
   onSubmit: SubmitHandler<EarnFormValues>
   /* TODO: make offerMinsizeMax mandatory */
-  offerMinsizeMax?: number
+  offerMinsizeMax?: AmountSats
   disabled?: boolean
 }
 
diff --git a/src/constants/jam.ts b/src/constants/jam.ts
index c1933bd5..ef40f5aa 100644
--- a/src/constants/jam.ts
+++ b/src/constants/jam.ts
@@ -1,4 +1,5 @@
 import { percentageToFactor } from '@/lib/utils'
+import type { AmountSats, Milliseconds } from '@/types/global'
 import { JM_API_AUTH_TOKEN_EXPIRY, JM_DUST_THRESHOLD } from './jm'
 
 export const TX_FEES_FACTOR_MIN = 0 // 0%
@@ -10,8 +11,8 @@ export const TX_FEES_FACTOR_MIN = 0 // 0%
  * Once resolved, this can be set to 100% again.
  */
 export const TX_FEES_FACTOR_MAX = percentageToFactor(50) // 50%
-export const CJ_FEE_ABS_MIN = 1
-export const CJ_FEE_ABS_MAX = 1_000_000 // 0.01 BTC - no enforcement by JM - this should be a "sane" max value
+export const CJ_FEE_ABS_MIN: AmountSats = 1
+export const CJ_FEE_ABS_MAX: AmountSats = 1_000_000 // 0.01 BTC - no enforcement by JM - this should be a "sane" max value
 export const CJ_FEE_REL_MIN = percentageToFactor(0.0001)
 export const CJ_FEE_REL_MAX = percentageToFactor(5) // no enforcement by JM - this should be a "sane" max value
 export const MAX_SWEEP_FEE_CHANGE_MIN = percentageToFactor(50)
@@ -22,30 +23,30 @@ export const OFFER_FEE_REL_MAX = percentageToFactor(10)
 export const OFFER_FEE_REL_STEP = percentageToFactor(0.0001)
 export const OFFER_FEE_REL_DEFAULT = percentageToFactor(0.0021)
 
-export const OFFER_FEE_ABS_MIN = 0
-export const OFFER_FEE_ABS_DEFAULT = 21
+export const OFFER_FEE_ABS_MIN: AmountSats = 0
+export const OFFER_FEE_ABS_DEFAULT: AmountSats = 21
 
-export const OFFER_MINSIZE_MIN = JM_DUST_THRESHOLD
-export const OFFER_MINSIZE_DEFAULT = 100_000
+export const OFFER_MINSIZE_MIN: AmountSats = JM_DUST_THRESHOLD
+export const OFFER_MINSIZE_DEFAULT: AmountSats = 100_000
 
-export const JAM_JM_SESSION_REFRESH_MIN_INTERVAL = 5_000
-export const JAM_JM_SESSION_REFRESH_DEFAULT_INTERVAL = 30_000
-export const JAM_JM_SESSION_REFRESH_INTERVAL = Math.max(
+export const JAM_JM_SESSION_REFRESH_MIN_INTERVAL: Milliseconds = 5_000
+export const JAM_JM_SESSION_REFRESH_DEFAULT_INTERVAL: Milliseconds = 30_000
+export const JAM_JM_SESSION_REFRESH_INTERVAL: Milliseconds = Math.max(
   import.meta.env.VITE_JAM_JM_SESSION_REFRESH_INTERVAL ?? JAM_JM_SESSION_REFRESH_DEFAULT_INTERVAL,
   JAM_JM_SESSION_REFRESH_MIN_INTERVAL,
 )
-export const JAM_API_AUTH_TOKEN_RENEW_INTERVAL = Math.round(JM_API_AUTH_TOKEN_EXPIRY * 0.75)
+export const JAM_API_AUTH_TOKEN_RENEW_INTERVAL: Milliseconds = Math.round(JM_API_AUTH_TOKEN_EXPIRY * 0.75)
 
-export const JAM_RESCAN_PROGRESS_MIN_INTERVAL = 5_000
-export const JAM_RESCAN_PROGRESS_DEFAULT_INTERVAL = 21_000
-export const JAM_RESCAN_PROGRESS_INTERVAL = Math.max(
+export const JAM_RESCAN_PROGRESS_MIN_INTERVAL: Milliseconds = 5_000
+export const JAM_RESCAN_PROGRESS_DEFAULT_INTERVAL: Milliseconds = 21_000
+export const JAM_RESCAN_PROGRESS_INTERVAL: Milliseconds = Math.max(
   import.meta.env.VITE_JAM_RESCAN_PROGRESS_INTERVAL ?? JAM_RESCAN_PROGRESS_DEFAULT_INTERVAL,
   JAM_RESCAN_PROGRESS_MIN_INTERVAL,
 )
 
-const JAM_SEED_MODAL_MIN_TIMEOUT = 5_000
-const JAM_SEED_MODAL_DEFAULT_TIMEOUT = 21_000
-export const JAM_SEED_MODAL_TIMEOUT = Math.max(
+const JAM_SEED_MODAL_MIN_TIMEOUT: Milliseconds = 5_000
+const JAM_SEED_MODAL_DEFAULT_TIMEOUT: Milliseconds = 21_000
+export const JAM_SEED_MODAL_TIMEOUT: Milliseconds = Math.max(
   import.meta.env.VITE_JAM_SEED_MODAL_TIMEOUT ?? JAM_SEED_MODAL_DEFAULT_TIMEOUT,
   JAM_SEED_MODAL_MIN_TIMEOUT,
 )
diff --git a/src/types/global.d.ts b/src/types/global.d.ts
index f61adc35..ec8bab4a 100644
--- a/src/types/global.d.ts
+++ b/src/types/global.d.ts
@@ -1,4 +1,5 @@
 export type Currency = 'sats' | 'btc'
+export type AmountSats = number
 
 export type Milliseconds = number
 export type Seconds = number