diff --git a/backend/src/graphql/enum/ContributionCycleType.ts b/backend/src/graphql/enum/ContributionCycleType.ts
index a3c55aa68..abcb6a477 100644
--- a/backend/src/graphql/enum/ContributionCycleType.ts
+++ b/backend/src/graphql/enum/ContributionCycleType.ts
@@ -1,27 +1,5 @@
 import { registerEnumType } from 'type-graphql'
-
-// lowercase values are not implemented yet
-export enum ContributionCycleType {
-  ONCE = 'ONCE',
-  HOUR = 'hour',
-  TWO_HOURS = 'two_hours',
-  FOUR_HOURS = 'four_hours',
-  EIGHT_HOURS = 'eight_hours',
-  HALF_DAY = 'half_day',
-  DAILY = 'DAILY',
-  TWO_DAYS = 'two_days',
-  THREE_DAYS = 'three_days',
-  FOUR_DAYS = 'four_days',
-  FIVE_DAYS = 'five_days',
-  SIX_DAYS = 'six_days',
-  WEEK = 'week',
-  TWO_WEEKS = 'two_weeks',
-  MONTH = 'month',
-  TWO_MONTH = 'two_month',
-  QUARTER = 'quarter',
-  HALF_YEAR = 'half_year',
-  YEAR = 'year',
-}
+import { ContributionCycleType } from 'database'
 
 registerEnumType(ContributionCycleType, {
   name: 'ContributionCycleType', // this one is mandatory
diff --git a/backend/src/graphql/enum/ContributionStatus.ts b/backend/src/graphql/enum/ContributionStatus.ts
index 67cdf5398..74b1cba47 100644
--- a/backend/src/graphql/enum/ContributionStatus.ts
+++ b/backend/src/graphql/enum/ContributionStatus.ts
@@ -1,12 +1,5 @@
 import { registerEnumType } from 'type-graphql'
-
-export enum ContributionStatus {
-  PENDING = 'PENDING',
-  DELETED = 'DELETED',
-  IN_PROGRESS = 'IN_PROGRESS',
-  DENIED = 'DENIED',
-  CONFIRMED = 'CONFIRMED',
-}
+import { ContributionStatus } from 'database'
 
 registerEnumType(ContributionStatus, {
   name: 'ContributionStatus',
diff --git a/backend/src/graphql/enum/ContributionType.ts b/backend/src/graphql/enum/ContributionType.ts
index e8529edc4..3be0b7595 100644
--- a/backend/src/graphql/enum/ContributionType.ts
+++ b/backend/src/graphql/enum/ContributionType.ts
@@ -1,10 +1,5 @@
 import { registerEnumType } from 'type-graphql'
-
-export enum ContributionType {
-  ADMIN = 'ADMIN',
-  USER = 'USER',
-  LINK = 'LINK',
-}
+import { ContributionType } from 'database'
 
 registerEnumType(ContributionType, {
   name: 'ContributionType',
diff --git a/database/src/enum/ContributionCycleType.ts b/database/src/enum/ContributionCycleType.ts
new file mode 100644
index 000000000..6974cb563
--- /dev/null
+++ b/database/src/enum/ContributionCycleType.ts
@@ -0,0 +1,22 @@
+// lowercase values are not implemented yet
+export enum ContributionCycleType {
+  ONCE = 'ONCE',
+  HOUR = 'hour',
+  TWO_HOURS = 'two_hours',
+  FOUR_HOURS = 'four_hours',
+  EIGHT_HOURS = 'eight_hours',
+  HALF_DAY = 'half_day',
+  DAILY = 'DAILY',
+  TWO_DAYS = 'two_days',
+  THREE_DAYS = 'three_days',
+  FOUR_DAYS = 'four_days',
+  FIVE_DAYS = 'five_days',
+  SIX_DAYS = 'six_days',
+  WEEK = 'week',
+  TWO_WEEKS = 'two_weeks',
+  MONTH = 'month',
+  TWO_MONTH = 'two_month',
+  QUARTER = 'quarter',
+  HALF_YEAR = 'half_year',
+  YEAR = 'year',
+}
diff --git a/database/src/enum/ContributionStatus.ts b/database/src/enum/ContributionStatus.ts
new file mode 100644
index 000000000..a4bbc55f3
--- /dev/null
+++ b/database/src/enum/ContributionStatus.ts
@@ -0,0 +1,7 @@
+export enum ContributionStatus {
+  PENDING = 'PENDING',
+  DELETED = 'DELETED',
+  IN_PROGRESS = 'IN_PROGRESS',
+  DENIED = 'DENIED',
+  CONFIRMED = 'CONFIRMED',
+}
diff --git a/database/src/enum/ContributionType.ts b/database/src/enum/ContributionType.ts
new file mode 100644
index 000000000..3cc15c94c
--- /dev/null
+++ b/database/src/enum/ContributionType.ts
@@ -0,0 +1,5 @@
+export enum ContributionType {
+  ADMIN = 'ADMIN',
+  USER = 'USER',
+  LINK = 'LINK',
+}
diff --git a/database/src/enum/TransactionTypeId.ts b/database/src/enum/TransactionTypeId.ts
new file mode 100644
index 000000000..dc5fc25e0
--- /dev/null
+++ b/database/src/enum/TransactionTypeId.ts
@@ -0,0 +1,8 @@
+export enum TransactionTypeId {
+  CREATION = 1,
+  SEND = 2,
+  RECEIVE = 3,
+  // This is a virtual property, never occurring on the database
+  DECAY = 4,
+  LINK_SUMMARY = 5,
+}
diff --git a/database/src/enum/index.ts b/database/src/enum/index.ts
index c1d445299..ed629db22 100644
--- a/database/src/enum/index.ts
+++ b/database/src/enum/index.ts
@@ -1 +1,5 @@
-export * from './CommunityHandshakeStateType'
\ No newline at end of file
+export * from './CommunityHandshakeStateType'
+export * from './ContributionType'
+export * from './ContributionStatus'
+export * from './TransactionTypeId'
+export * from './ContributionCycleType'
\ No newline at end of file