diff --git a/keyserver/src/scripts/generate-converter-from-validator.js b/keyserver/src/scripts/generate-converter-from-validator.js
new file mode 100644
--- /dev/null
+++ b/keyserver/src/scripts/generate-converter-from-validator.js
@@ -0,0 +1,201 @@
+// @flow
+
+import { type TInterface, type TType, type TUnion } from 'tcomb';
+
+import { nativeMediaSelectionValidator } from 'lib/types/media-types.js';
+import { threadPermissionInfoValidator } from 'lib/types/thread-permission-types.js';
+import { rawThreadInfoValidator } from 'lib/types/thread-types.js';
+import { keyserverPrefixID, tID } from 'lib/utils/validation-utils.js';
+
+import { main } from './utils.js';
+
+function getDiscriminatorFieldForUnionValidator(validator: TType<mixed>) {
+  if (validator === threadPermissionInfoValidator) {
+    return 'value';
+  }
+  if (validator === nativeMediaSelectionValidator) {
+    return 'step';
+  }
+  return 'type';
+}
+
+function flattenInnerUnionValidators<T>(
+  unionValidator: TUnion<T>,
+): TInterface<{ +[string]: mixed }>[] {
+  let innerValidators = [];
+  for (const innerValidator of unionValidator.meta.types) {
+    if (innerValidator.meta.kind === 'interface') {
+      const innerInterfaceValidator: TInterface<{ +[string]: mixed }> =
+        (innerValidator: any);
+      innerValidators.push(innerInterfaceValidator);
+    } else if (innerValidator.meta.kind === 'union') {
+      const innerUnionValidator: TUnion<mixed> = (innerValidator: any);
+      innerValidators = [
+        ...innerValidators,
+        ...flattenInnerUnionValidators(innerUnionValidator),
+      ];
+    } else {
+      throw new Error(
+        `Validator not supported in union: ${innerValidator.displayName}`,
+      );
+    }
+  }
+  return innerValidators;
+}
+
+// `null` is returned if there is no conversion needed in T or any
+// of it's inner types
+function generateConverterFromValidator<T, C>(
+  validator: TType<T>,
+  inputName: string,
+  validatorToBeConverted: TType<C>,
+  conversionExpressionString: (inputName: string) => string,
+): ?string {
+  if (validator === validatorToBeConverted) {
+    return `(${conversionExpressionString(inputName)})`;
+  }
+
+  if (validator.meta.kind === 'maybe') {
+    const inner = generateConverterFromValidator(
+      validator.meta.type,
+      inputName,
+      validatorToBeConverted,
+      conversionExpressionString,
+    );
+    if (!inner) {
+      return null;
+    }
+    return `((${inputName} !== null && ${inputName} !== undefined) ? (${inner}) : (${inputName}))`;
+  }
+  if (validator.meta.kind === 'subtype') {
+    return generateConverterFromValidator(
+      validator.meta.type,
+      inputName,
+      validatorToBeConverted,
+      conversionExpressionString,
+    );
+  }
+  if (validator.meta.kind === 'interface') {
+    const recastValidator: TInterface<{ +[string]: mixed }> = (validator: any);
+    const fieldConverters = [];
+    for (const key in recastValidator.meta.props) {
+      const inner = generateConverterFromValidator(
+        recastValidator.meta.props[key],
+        `${inputName}.${key}`,
+        validatorToBeConverted,
+        conversionExpressionString,
+      );
+      if (inner) {
+        fieldConverters.push(`${key}:${inner}`);
+      }
+    }
+    if (fieldConverters.length === 0) {
+      return null;
+    }
+
+    return `({...${inputName}, ${fieldConverters.join(',')}})`;
+  }
+  if (validator.meta.kind === 'union') {
+    const unionValidator: TUnion<T> = (validator: any);
+    let flattenedInnerValidators = null;
+    flattenedInnerValidators = flattenInnerUnionValidators(unionValidator);
+
+    const variantConverters = [];
+    for (const innerValidator of flattenedInnerValidators) {
+      const discriminatorField =
+        getDiscriminatorFieldForUnionValidator(validator);
+      const discriminatorValidator: TType<mixed> =
+        innerValidator.meta.props[discriminatorField];
+
+      if (!discriminatorValidator) {
+        throw new Error(
+          'Union should have a discriminator ' + validator.displayName,
+        );
+      }
+
+      const discriminator = discriminatorValidator.meta.name;
+
+      const inner = generateConverterFromValidator(
+        innerValidator,
+        inputName,
+        validatorToBeConverted,
+        conversionExpressionString,
+      );
+
+      if (inner) {
+        variantConverters.push(
+          `(${inputName}.${discriminatorField} === ${discriminator}) ? (${inner})`,
+        );
+      }
+    }
+    if (variantConverters.length === 0) {
+      return null;
+    }
+    variantConverters.push(`(${inputName})`);
+    return `(${variantConverters.join(':')})`;
+  }
+  if (validator.meta.kind === 'list') {
+    const inner = generateConverterFromValidator(
+      validator.meta.type,
+      'elem',
+      validatorToBeConverted,
+      conversionExpressionString,
+    );
+    if (!inner) {
+      return inputName;
+    }
+    return `(${inputName}.map(elem => ${inner}))`;
+  }
+  if (validator.meta.kind === 'dict') {
+    const domainValidator = validator.meta.domain;
+    const codomainValidator = validator.meta.codomain;
+
+    let domainConverter = null;
+    if (domainValidator === validatorToBeConverted) {
+      domainConverter = conversionExpressionString('key');
+    }
+
+    let codomainConverter = generateConverterFromValidator(
+      codomainValidator,
+      'value',
+      validatorToBeConverted,
+      conversionExpressionString,
+    );
+
+    if (!domainConverter && !codomainConverter) {
+      return null;
+    }
+
+    domainConverter = domainConverter ?? 'key';
+    codomainConverter = codomainConverter ?? 'value';
+
+    return `(Object.fromEntries(
+          entries(${inputName}).map(
+            ([key, value]) => [${domainConverter}, ${codomainConverter}]
+          )
+        ))`;
+  }
+
+  return null;
+}
+
+// Input arguments:
+const validator = rawThreadInfoValidator;
+const typeName = 'RawThreadInfo';
+const validatorToBeConverted = tID;
+const conversionExpressionString = inputName =>
+  `'${keyserverPrefixID}|' + ${inputName}`;
+main([
+  async () => {
+    console.log(
+      `export function convert${typeName}ToNewIDSchema(input: ${typeName}): ${typeName} { return`,
+      generateConverterFromValidator(
+        validator,
+        'input',
+        validatorToBeConverted,
+        conversionExpressionString,
+      ) ?? 'input',
+      ';}',
+    );
+  },
+]);
diff --git a/lib/_generated/migration-utils.js b/lib/_generated/migration-utils.js
new file mode 100644
--- /dev/null
+++ b/lib/_generated/migration-utils.js
@@ -0,0 +1,880 @@
+// @flow
+
+import type { EntryStore } from '../types/entry-types.js';
+import type { InviteLinksStore } from '../types/link-types.js';
+import type { MessageStore, RawMessageInfo } from '../types/message-types.js';
+import type { RawThreadInfo } from '../types/thread-types.js';
+import { entries } from '../utils/objects.js';
+
+export function convertRawMessageInfoToNewIDSchema(
+  input: RawMessageInfo,
+): RawMessageInfo {
+  return input.type === 0
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        id:
+          input.id !== null && input.id !== undefined
+            ? '256|' + input.id
+            : input.id,
+      }
+    : input.type === 14
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        media: input.media.map(elem => ({ ...elem, id: '256|' + elem.id })),
+        id:
+          input.id !== null && input.id !== undefined
+            ? '256|' + input.id
+            : input.id,
+      }
+    : input.type === 15
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        media: input.media.map(elem =>
+          elem.type === 'photo'
+            ? { ...elem, id: '256|' + elem.id }
+            : elem.type === 'video'
+            ? {
+                ...elem,
+                id: '256|' + elem.id,
+                thumbnailID: '256|' + elem.thumbnailID,
+              }
+            : elem.type === 'encrypted_photo'
+            ? { ...elem, id: '256|' + elem.id }
+            : elem.type === 'encrypted_video'
+            ? {
+                ...elem,
+                id: '256|' + elem.id,
+                thumbnailID: '256|' + elem.thumbnailID,
+              }
+            : elem,
+        ),
+        id:
+          input.id !== null && input.id !== undefined
+            ? '256|' + input.id
+            : input.id,
+      }
+    : input.type === 1
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        initialThreadState: {
+          ...input.initialThreadState,
+          parentThreadID:
+            input.initialThreadState.parentThreadID !== null &&
+            input.initialThreadState.parentThreadID !== undefined
+              ? '256|' + input.initialThreadState.parentThreadID
+              : input.initialThreadState.parentThreadID,
+          memberIDs: input.initialThreadState.memberIDs,
+        },
+        id: '256|' + input.id,
+      }
+    : input.type === 2
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        addedUserIDs: input.addedUserIDs,
+        id: '256|' + input.id,
+      }
+    : input.type === 3
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        childThreadID: '256|' + input.childThreadID,
+        id: '256|' + input.id,
+      }
+    : input.type === 4
+    ? { ...input, threadID: '256|' + input.threadID, id: '256|' + input.id }
+    : input.type === 5
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        removedUserIDs: input.removedUserIDs,
+        id: '256|' + input.id,
+      }
+    : input.type === 6
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        userIDs: input.userIDs,
+        newRole: '256|' + input.newRole,
+        id: '256|' + input.id,
+      }
+    : input.type === 7
+    ? { ...input, threadID: '256|' + input.threadID, id: '256|' + input.id }
+    : input.type === 8
+    ? { ...input, threadID: '256|' + input.threadID, id: '256|' + input.id }
+    : input.type === 9
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        entryID: '256|' + input.entryID,
+        id: '256|' + input.id,
+      }
+    : input.type === 10
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        entryID: '256|' + input.entryID,
+        id: '256|' + input.id,
+      }
+    : input.type === 11
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        entryID: '256|' + input.entryID,
+        id: '256|' + input.id,
+      }
+    : input.type === 12
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        entryID: '256|' + input.entryID,
+        id: '256|' + input.id,
+      }
+    : input.type === 16
+    ? { ...input, threadID: '256|' + input.threadID, id: '256|' + input.id }
+    : input.type === 18
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        initialThreadState: {
+          ...input.initialThreadState,
+          parentThreadID: '256|' + input.initialThreadState.parentThreadID,
+          memberIDs: input.initialThreadState.memberIDs,
+        },
+        id: '256|' + input.id,
+      }
+    : input.type === 13
+    ? { ...input, id: '256|' + input.id, threadID: '256|' + input.threadID }
+    : input.type === 21
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        targetMessageID: '256|' + input.targetMessageID,
+        id: '256|' + input.id,
+      }
+    : input.type === 17
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        sourceMessage:
+          input.sourceMessage !== null && input.sourceMessage !== undefined
+            ? input.sourceMessage.type === 0
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  id:
+                    input.sourceMessage.id !== null &&
+                    input.sourceMessage.id !== undefined
+                      ? '256|' + input.sourceMessage.id
+                      : input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 14
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  id:
+                    input.sourceMessage.id !== null &&
+                    input.sourceMessage.id !== undefined
+                      ? '256|' + input.sourceMessage.id
+                      : input.sourceMessage.id,
+                  media: input.sourceMessage.media.map(elem => ({
+                    ...elem,
+                    id: '256|' + elem.id,
+                  })),
+                }
+              : input.sourceMessage.type === 15
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  id:
+                    input.sourceMessage.id !== null &&
+                    input.sourceMessage.id !== undefined
+                      ? '256|' + input.sourceMessage.id
+                      : input.sourceMessage.id,
+                  media: input.sourceMessage.media.map(elem =>
+                    elem.type === 'photo'
+                      ? { ...elem, id: '256|' + elem.id }
+                      : elem.type === 'video'
+                      ? {
+                          ...elem,
+                          id: '256|' + elem.id,
+                          thumbnailID: '256|' + elem.thumbnailID,
+                        }
+                      : elem.type === 'encrypted_photo'
+                      ? { ...elem, id: '256|' + elem.id }
+                      : elem.type === 'encrypted_video'
+                      ? {
+                          ...elem,
+                          id: '256|' + elem.id,
+                          thumbnailID: '256|' + elem.thumbnailID,
+                        }
+                      : elem,
+                  ),
+                }
+              : input.sourceMessage.type === 1
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  initialThreadState: {
+                    ...input.sourceMessage.initialThreadState,
+                    parentThreadID:
+                      input.sourceMessage.initialThreadState.parentThreadID !==
+                        null &&
+                      input.sourceMessage.initialThreadState.parentThreadID !==
+                        undefined
+                        ? '256|' +
+                          input.sourceMessage.initialThreadState.parentThreadID
+                        : input.sourceMessage.initialThreadState.parentThreadID,
+                    memberIDs: input.sourceMessage.initialThreadState.memberIDs,
+                  },
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 2
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  addedUserIDs: input.sourceMessage.addedUserIDs,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 3
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  childThreadID: '256|' + input.sourceMessage.childThreadID,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 4
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 5
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  removedUserIDs: input.sourceMessage.removedUserIDs,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 6
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  userIDs: input.sourceMessage.userIDs,
+                  newRole: '256|' + input.sourceMessage.newRole,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 7
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 8
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 9
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  entryID: '256|' + input.sourceMessage.entryID,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 10
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  entryID: '256|' + input.sourceMessage.entryID,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 11
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  entryID: '256|' + input.sourceMessage.entryID,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 12
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  entryID: '256|' + input.sourceMessage.entryID,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 16
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 18
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  initialThreadState: {
+                    ...input.sourceMessage.initialThreadState,
+                    parentThreadID:
+                      '256|' +
+                      input.sourceMessage.initialThreadState.parentThreadID,
+                    memberIDs: input.sourceMessage.initialThreadState.memberIDs,
+                  },
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage.type === 13
+              ? {
+                  ...input.sourceMessage,
+                  id: '256|' + input.sourceMessage.id,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                }
+              : input.sourceMessage.type === 21
+              ? {
+                  ...input.sourceMessage,
+                  threadID: '256|' + input.sourceMessage.threadID,
+                  targetMessageID: '256|' + input.sourceMessage.targetMessageID,
+                  id: '256|' + input.sourceMessage.id,
+                }
+              : input.sourceMessage
+            : input.sourceMessage,
+        id: '256|' + input.id,
+      }
+    : input.type === 19
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        targetMessageID: '256|' + input.targetMessageID,
+        id:
+          input.id !== null && input.id !== undefined
+            ? '256|' + input.id
+            : input.id,
+      }
+    : input.type === 20
+    ? {
+        ...input,
+        threadID: '256|' + input.threadID,
+        targetMessageID: '256|' + input.targetMessageID,
+        id: '256|' + input.id,
+      }
+    : input;
+}
+
+export function convertRawThreadInfoToNewIDSchema(
+  input: RawThreadInfo,
+): RawThreadInfo {
+  return {
+    ...input,
+    id: '256|' + input.id,
+    parentThreadID:
+      input.parentThreadID !== null && input.parentThreadID !== undefined
+        ? '256|' + input.parentThreadID
+        : input.parentThreadID,
+    containingThreadID:
+      input.containingThreadID !== null &&
+      input.containingThreadID !== undefined
+        ? '256|' + input.containingThreadID
+        : input.containingThreadID,
+    community:
+      input.community !== null && input.community !== undefined
+        ? '256|' + input.community
+        : input.community,
+    members: input.members.map(elem => ({
+      ...elem,
+      role:
+        elem.role !== null && elem.role !== undefined
+          ? '256|' + elem.role
+          : elem.role,
+      permissions: Object.fromEntries(
+        entries(elem.permissions).map(([key, value]) => [
+          key,
+          value.value === true
+            ? { ...value, source: '256|' + value.source }
+            : value,
+        ]),
+      ),
+    })),
+    roles: Object.fromEntries(
+      entries(input.roles).map(([key, value]) => [
+        '256|' + key,
+        { ...value, id: '256|' + value.id },
+      ]),
+    ),
+    currentUser: {
+      ...input.currentUser,
+      role:
+        input.currentUser.role !== null && input.currentUser.role !== undefined
+          ? '256|' + input.currentUser.role
+          : input.currentUser.role,
+      permissions: Object.fromEntries(
+        entries(input.currentUser.permissions).map(([key, value]) => [
+          key,
+          value.value === true
+            ? { ...value, source: '256|' + value.source }
+            : value,
+        ]),
+      ),
+    },
+    sourceMessageID:
+      input.sourceMessageID !== null && input.sourceMessageID !== undefined
+        ? '256|' + input.sourceMessageID
+        : input.sourceMessageID,
+  };
+}
+
+export function convertMessageStoreToNewIDSchema(
+  input: MessageStore,
+): MessageStore {
+  return {
+    ...input,
+    messages: Object.fromEntries(
+      entries(input.messages).map(([key, value]) => [
+        '256|' + key,
+        value.type === 0
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              id:
+                value.id !== null && value.id !== undefined
+                  ? '256|' + value.id
+                  : value.id,
+            }
+          : value.type === 14
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              media: value.media.map(elem => ({
+                ...elem,
+                id: '256|' + elem.id,
+              })),
+              id:
+                value.id !== null && value.id !== undefined
+                  ? '256|' + value.id
+                  : value.id,
+            }
+          : value.type === 15
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              media: value.media.map(elem =>
+                elem.type === 'photo'
+                  ? { ...elem, id: '256|' + elem.id }
+                  : elem.type === 'video'
+                  ? {
+                      ...elem,
+                      id: '256|' + elem.id,
+                      thumbnailID: '256|' + elem.thumbnailID,
+                    }
+                  : elem.type === 'encrypted_photo'
+                  ? { ...elem, id: '256|' + elem.id }
+                  : elem.type === 'encrypted_video'
+                  ? {
+                      ...elem,
+                      id: '256|' + elem.id,
+                      thumbnailID: '256|' + elem.thumbnailID,
+                    }
+                  : elem,
+              ),
+              id:
+                value.id !== null && value.id !== undefined
+                  ? '256|' + value.id
+                  : value.id,
+            }
+          : value.type === 1
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              initialThreadState: {
+                ...value.initialThreadState,
+                parentThreadID:
+                  value.initialThreadState.parentThreadID !== null &&
+                  value.initialThreadState.parentThreadID !== undefined
+                    ? '256|' + value.initialThreadState.parentThreadID
+                    : value.initialThreadState.parentThreadID,
+                memberIDs: value.initialThreadState.memberIDs,
+              },
+              id: '256|' + value.id,
+            }
+          : value.type === 2
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              addedUserIDs: value.addedUserIDs,
+              id: '256|' + value.id,
+            }
+          : value.type === 3
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              childThreadID: '256|' + value.childThreadID,
+              id: '256|' + value.id,
+            }
+          : value.type === 4
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              id: '256|' + value.id,
+            }
+          : value.type === 5
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              removedUserIDs: value.removedUserIDs,
+              id: '256|' + value.id,
+            }
+          : value.type === 6
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              userIDs: value.userIDs,
+              newRole: '256|' + value.newRole,
+              id: '256|' + value.id,
+            }
+          : value.type === 7
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              id: '256|' + value.id,
+            }
+          : value.type === 8
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              id: '256|' + value.id,
+            }
+          : value.type === 9
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              entryID: '256|' + value.entryID,
+              id: '256|' + value.id,
+            }
+          : value.type === 10
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              entryID: '256|' + value.entryID,
+              id: '256|' + value.id,
+            }
+          : value.type === 11
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              entryID: '256|' + value.entryID,
+              id: '256|' + value.id,
+            }
+          : value.type === 12
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              entryID: '256|' + value.entryID,
+              id: '256|' + value.id,
+            }
+          : value.type === 16
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              id: '256|' + value.id,
+            }
+          : value.type === 18
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              initialThreadState: {
+                ...value.initialThreadState,
+                parentThreadID:
+                  '256|' + value.initialThreadState.parentThreadID,
+                memberIDs: value.initialThreadState.memberIDs,
+              },
+              id: '256|' + value.id,
+            }
+          : value.type === 13
+          ? {
+              ...value,
+              id: '256|' + value.id,
+              threadID: '256|' + value.threadID,
+            }
+          : value.type === 21
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              targetMessageID: '256|' + value.targetMessageID,
+              id: '256|' + value.id,
+            }
+          : value.type === 17
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              sourceMessage:
+                value.sourceMessage !== null &&
+                value.sourceMessage !== undefined
+                  ? value.sourceMessage.type === 0
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        id:
+                          value.sourceMessage.id !== null &&
+                          value.sourceMessage.id !== undefined
+                            ? '256|' + value.sourceMessage.id
+                            : value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 14
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        id:
+                          value.sourceMessage.id !== null &&
+                          value.sourceMessage.id !== undefined
+                            ? '256|' + value.sourceMessage.id
+                            : value.sourceMessage.id,
+                        media: value.sourceMessage.media.map(elem => ({
+                          ...elem,
+                          id: '256|' + elem.id,
+                        })),
+                      }
+                    : value.sourceMessage.type === 15
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        id:
+                          value.sourceMessage.id !== null &&
+                          value.sourceMessage.id !== undefined
+                            ? '256|' + value.sourceMessage.id
+                            : value.sourceMessage.id,
+                        media: value.sourceMessage.media.map(elem =>
+                          elem.type === 'photo'
+                            ? { ...elem, id: '256|' + elem.id }
+                            : elem.type === 'video'
+                            ? {
+                                ...elem,
+                                id: '256|' + elem.id,
+                                thumbnailID: '256|' + elem.thumbnailID,
+                              }
+                            : elem.type === 'encrypted_photo'
+                            ? { ...elem, id: '256|' + elem.id }
+                            : elem.type === 'encrypted_video'
+                            ? {
+                                ...elem,
+                                id: '256|' + elem.id,
+                                thumbnailID: '256|' + elem.thumbnailID,
+                              }
+                            : elem,
+                        ),
+                      }
+                    : value.sourceMessage.type === 1
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        initialThreadState: {
+                          ...value.sourceMessage.initialThreadState,
+                          parentThreadID:
+                            value.sourceMessage.initialThreadState
+                              .parentThreadID !== null &&
+                            value.sourceMessage.initialThreadState
+                              .parentThreadID !== undefined
+                              ? '256|' +
+                                value.sourceMessage.initialThreadState
+                                  .parentThreadID
+                              : value.sourceMessage.initialThreadState
+                                  .parentThreadID,
+                          memberIDs:
+                            value.sourceMessage.initialThreadState.memberIDs,
+                        },
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 2
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        addedUserIDs: value.sourceMessage.addedUserIDs,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 3
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        childThreadID:
+                          '256|' + value.sourceMessage.childThreadID,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 4
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 5
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        removedUserIDs: value.sourceMessage.removedUserIDs,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 6
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        userIDs: value.sourceMessage.userIDs,
+                        newRole: '256|' + value.sourceMessage.newRole,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 7
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 8
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 9
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        entryID: '256|' + value.sourceMessage.entryID,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 10
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        entryID: '256|' + value.sourceMessage.entryID,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 11
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        entryID: '256|' + value.sourceMessage.entryID,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 12
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        entryID: '256|' + value.sourceMessage.entryID,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 16
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 18
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        initialThreadState: {
+                          ...value.sourceMessage.initialThreadState,
+                          parentThreadID:
+                            '256|' +
+                            value.sourceMessage.initialThreadState
+                              .parentThreadID,
+                          memberIDs:
+                            value.sourceMessage.initialThreadState.memberIDs,
+                        },
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage.type === 13
+                    ? {
+                        ...value.sourceMessage,
+                        id: '256|' + value.sourceMessage.id,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                      }
+                    : value.sourceMessage.type === 21
+                    ? {
+                        ...value.sourceMessage,
+                        threadID: '256|' + value.sourceMessage.threadID,
+                        targetMessageID:
+                          '256|' + value.sourceMessage.targetMessageID,
+                        id: '256|' + value.sourceMessage.id,
+                      }
+                    : value.sourceMessage
+                  : value.sourceMessage,
+              id: '256|' + value.id,
+            }
+          : value.type === 19
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              targetMessageID: '256|' + value.targetMessageID,
+              id:
+                value.id !== null && value.id !== undefined
+                  ? '256|' + value.id
+                  : value.id,
+            }
+          : value.type === 20
+          ? {
+              ...value,
+              threadID: '256|' + value.threadID,
+              targetMessageID: '256|' + value.targetMessageID,
+              id: '256|' + value.id,
+            }
+          : value,
+      ]),
+    ),
+    threads: Object.fromEntries(
+      entries(input.threads).map(([key, value]) => [
+        '256|' + key,
+        { ...value, messageIDs: value.messageIDs.map(elem => '256|' + elem) },
+      ]),
+    ),
+  };
+}
+
+export function convertEntryStoreToNewIDSchema(input: EntryStore): EntryStore {
+  return {
+    ...input,
+    entryInfos: Object.fromEntries(
+      entries(input.entryInfos).map(([key, value]) => [
+        '256|' + key,
+        {
+          ...value,
+          id:
+            value.id !== null && value.id !== undefined
+              ? '256|' + value.id
+              : value.id,
+          threadID: '256|' + value.threadID,
+        },
+      ]),
+    ),
+    daysToEntries: Object.fromEntries(
+      entries(input.daysToEntries).map(([key, value]) => [
+        key,
+        value.map(elem => '256|' + elem),
+      ]),
+    ),
+  };
+}
+
+export function convertInviteLinksStoreToNewIDSchema(
+  input: InviteLinksStore,
+): InviteLinksStore {
+  return {
+    ...input,
+    links: Object.fromEntries(
+      entries(input.links).map(([key, value]) => [
+        '256|' + key,
+        {
+          ...value,
+          primaryLink:
+            value.primaryLink !== null && value.primaryLink !== undefined
+              ? {
+                  ...value.primaryLink,
+                  role: '256|' + value.primaryLink.role,
+                  communityID: '256|' + value.primaryLink.communityID,
+                }
+              : value.primaryLink,
+        },
+      ]),
+    ),
+  };
+}
diff --git a/lib/utils/objects.js b/lib/utils/objects.js
--- a/lib/utils/objects.js
+++ b/lib/utils/objects.js
@@ -50,6 +50,11 @@
   return Object.keys(map);
 }
 
+function entries<K: string, T>(map: ObjectMap<K, T>): [K, T][] {
+  // $FlowFixMe - flow treats the values as mixed, but we know that they are T
+  return Object.entries(map);
+}
+
 function assignValueWithKey<K, T>(
   obj: NestedObjectMap<K, T>,
   key: K,
@@ -116,4 +121,11 @@
   );
 }
 
-export { findMaximumDepth, values, hash, assertObjectsAreEqual, deepDiff };
+export {
+  findMaximumDepth,
+  values,
+  hash,
+  assertObjectsAreEqual,
+  deepDiff,
+  entries,
+};
diff --git a/lib/utils/validation-utils.js b/lib/utils/validation-utils.js
--- a/lib/utils/validation-utils.js
+++ b/lib/utils/validation-utils.js
@@ -27,15 +27,15 @@
 } from '../types/messages/media';
 
 function tBool(value: boolean): TIrreducible<boolean> {
-  return t.irreducible('literal bool', x => x === value);
+  return t.irreducible(value.toString(), x => x === value);
 }
 
 function tString(value: string): TIrreducible<string> {
-  return t.irreducible('literal string', x => x === value);
+  return t.irreducible(`'${value}'`, x => x === value);
 }
 
 function tNumber(value: number): TIrreducible<number> {
-  return t.irreducible('literal number', x => x === value);
+  return t.irreducible(value.toString(), x => x === value);
 }
 
 function tShape<T>(spec: TStructProps<T>): TInterface<T> {