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AccountUpdateForest

Class which represents a forest (list of trees) of account updates, in a compressed way which allows iterating and selectively witnessing the account updates.

The (recursive) type signature is:

type AccountUpdateForest = MerkleList<AccountUpdateTree>;
type AccountUpdateTree = {
  accountUpdate: Hashed<AccountUpdate>;
  children: AccountUpdateForest;
};

Extends​

  • MerkleList\<{"accountUpdate": HashedAccountUpdate.provable; "children": MerkleListBase\<AccountUpdateTreeBase>; "id": RandomId; }, this>

Constructors​

new AccountUpdateForest()​

new AccountUpdateForest(__namedParameters: MerkleListBase<{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
 }>): AccountUpdateForest

Parameters​

• __namedParameters: MerkleListBase\<{ "accountUpdate": HashedAccountUpdate.provable; "children": MerkleListBase\<AccountUpdateTreeBase>; "id": RandomId; }>

Returns​

AccountUpdateForest

Inherited from​

MerkleList.constructor

Source​

lib/provable/merkle-list.ts:83

Properties​

data​

data: Unconstrained<WithHash<{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}>[]>;

Inherited from​

MerkleList.data

Source​

lib/provable/merkle-list.ts:81

hash​

hash: Field;

Inherited from​

MerkleList.hash

Source​

lib/provable/merkle-list.ts:80

_emptyHash​

static _emptyHash: undefined | Field;

Inherited from​

MerkleList._emptyHash

Source​

lib/provable/merkle-list.ts:274

_innerProvable​

static _innerProvable: undefined | ProvableHashable<any>;

Inherited from​

MerkleList._innerProvable

Source​

lib/provable/merkle-list.ts:277

_nextHash​

static _nextHash: undefined | (hash: Field, t: any) => Field;

Inherited from​

MerkleList._nextHash

Source​

lib/provable/merkle-list.ts:273

_provable​

static _provable: undefined | ProvableHashable<MerkleList<any>>;

Inherited from​

MerkleList._provable

Source​

lib/provable/merkle-list.ts:276

empty()​

static empty: () => MerkleList<{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}>;

Returns​

MerkleList\<{ "accountUpdate": HashedAccountUpdate.provable; "children": MerkleListBase\<AccountUpdateTreeBase>; "id": RandomId; }>

accountUpdate​
accountUpdate: Hashed<AccountUpdate> = HashedAccountUpdate.provable;
children​
children: MerkleListBase<AccountUpdateTreeBase>;
id​
id: number = RandomId;

Inherited from​

MerkleList.create( AccountUpdateTreeBase, merkleListHash ).empty

Source​

lib/provable/merkle-list.ts:222

from()​

static from: (array: {
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
 }[]) => MerkleList<{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}>;

Parameters​

• array: { "accountUpdate": HashedAccountUpdate.provable; "children": MerkleListBase\<AccountUpdateTreeBase>; "id": RandomId; }[]

Returns​

MerkleList\<{ "accountUpdate": HashedAccountUpdate.provable; "children": MerkleListBase\<AccountUpdateTreeBase>; "id": RandomId; }>

accountUpdate​
accountUpdate: Hashed<AccountUpdate> = HashedAccountUpdate.provable;
children​
children: MerkleListBase<AccountUpdateTreeBase>;
id​
id: number = RandomId;

Inherited from​

MerkleList.create( AccountUpdateTreeBase, merkleListHash ).from

Source​

lib/provable/merkle-list.ts:223

fromReverse()​

static fromReverse: (array: {
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
 }[]) => MerkleList<{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}>;

Parameters​

• array: { "accountUpdate": HashedAccountUpdate.provable; "children": MerkleListBase\<AccountUpdateTreeBase>; "id": RandomId; }[]

Returns​

MerkleList\<{ "accountUpdate": HashedAccountUpdate.provable; "children": MerkleListBase\<AccountUpdateTreeBase>; "id": RandomId; }>

accountUpdate​
accountUpdate: Hashed<AccountUpdate> = HashedAccountUpdate.provable;
children​
children: MerkleListBase<AccountUpdateTreeBase>;
id​
id: number = RandomId;

Inherited from​

MerkleList.create( AccountUpdateTreeBase, merkleListHash ).fromReverse

Source​

lib/provable/merkle-list.ts:224

provable​

static provable: ProvableHashable<MerkleList<{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}>>;

Inherited from​

MerkleList.create( AccountUpdateTreeBase, merkleListHash ).provable

Source​

lib/provable/merkle-list.ts:225

Accessors​

Constructor​

get Constructor(): typeof MerkleList

Returns​

typeof MerkleList

Source​

lib/provable/merkle-list.ts:279

innerProvable​

get innerProvable(): ProvableHashable<T>

Returns​

ProvableHashable\<T>

Source​

lib/provable/merkle-list.ts:296

emptyHash​

get static emptyHash(): Field

Returns​

Field

Source​

lib/provable/merkle-list.ts:291

Methods​

clone()​

clone(): MerkleList<{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}>

Returns​

MerkleList\<{ "accountUpdate": HashedAccountUpdate.provable; "children": MerkleListBase\<AccountUpdateTreeBase>; "id": RandomId; }>

accountUpdate​
accountUpdate: Hashed<AccountUpdate> = HashedAccountUpdate.provable;
children​
children: MerkleListBase<AccountUpdateTreeBase>;
id​
id: number = RandomId;

Inherited from​

MerkleList.clone

Source​

lib/provable/merkle-list.ts:189

isEmpty()​

isEmpty(): Bool

Returns​

Bool

Inherited from​

MerkleList.isEmpty

Source​

lib/provable/merkle-list.ts:88

nextHash()​

nextHash(hash: Field, value: {
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
 }): Field

Parameters​

• hash: Field

• value

• value.accountUpdate: Hashed\<AccountUpdate>= HashedAccountUpdate.provable

• value.children: MerkleListBase\<AccountUpdateTreeBase>= undefined

• value.id: number= RandomId

Returns​

Field

Inherited from​

MerkleList.nextHash

Source​

lib/provable/merkle-list.ts:283

pop()​

pop(): {
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}

Remove the last element from the list and return it.

If the list is empty, returns a dummy element.

Returns​

{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}
accountUpdate​
accountUpdate: Hashed<AccountUpdate> = HashedAccountUpdate.provable;
children​
children: MerkleListBase<AccountUpdateTreeBase>;
id​
id: number = RandomId;

Inherited from​

MerkleList.pop

Source​

lib/provable/merkle-list.ts:154

popExn()​

popExn(): {
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}

Remove the last element from the list and return it.

This proves that the list is non-empty, and fails otherwise.

Returns​

{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}
accountUpdate​
accountUpdate: Hashed<AccountUpdate> = HashedAccountUpdate.provable;
children​
children: MerkleListBase<AccountUpdateTreeBase>;
id​
id: number = RandomId;

Inherited from​

MerkleList.popExn

Source​

lib/provable/merkle-list.ts:139

popIf()​

popIf(condition: Bool): {
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}

Return the last element, but only remove it if condition is true.

If the list is empty, returns a dummy element.

Parameters​

• condition: Bool

Returns​

{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}
accountUpdate​
accountUpdate: Hashed<AccountUpdate> = HashedAccountUpdate.provable;
children​
children: MerkleListBase<AccountUpdateTreeBase>;
id​
id: number = RandomId;

Inherited from​

MerkleList.popIf

Source​

lib/provable/merkle-list.ts:173

push()​

push(element: {
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
 }): void

Push a new element to the list.

Parameters​

• element

• element.accountUpdate: Hashed\<AccountUpdate>= HashedAccountUpdate.provable

• element.children: MerkleListBase\<AccountUpdateTreeBase>= undefined

• element.id: number= RandomId

Returns​

void

Inherited from​

MerkleList.push

Source​

lib/provable/merkle-list.ts:95

pushIf()​

pushIf(condition: Bool, element: {
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
 }): void

Push a new element to the list, if the condition is true.

Parameters​

• condition: Bool

• element

• element.accountUpdate: Hashed\<AccountUpdate>= HashedAccountUpdate.provable

• element.children: MerkleListBase\<AccountUpdateTreeBase>= undefined

• element.id: number= RandomId

Returns​

void

Inherited from​

MerkleList.pushIf

Source​

lib/provable/merkle-list.ts:107

startIterating()​

startIterating(): MerkleListIterator<{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}>

Returns​

MerkleListIterator\<{ "accountUpdate": HashedAccountUpdate.provable; "children": MerkleListBase\<AccountUpdateTreeBase>; "id": RandomId; }>

accountUpdate​
accountUpdate: Hashed<AccountUpdate> = HashedAccountUpdate.provable;
children​
children: MerkleListBase<AccountUpdateTreeBase>;
id​
id: number = RandomId;

Inherited from​

MerkleList.startIterating

Source​

lib/provable/merkle-list.ts:194

startIteratingFromLast()​

startIteratingFromLast(): MerkleListIterator<{
  "accountUpdate": HashedAccountUpdate.provable;
  "children": MerkleListBase<AccountUpdateTreeBase>;
  "id": RandomId;
}>

Returns​

MerkleListIterator\<{ "accountUpdate": HashedAccountUpdate.provable; "children": MerkleListBase\<AccountUpdateTreeBase>; "id": RandomId; }>

accountUpdate​
accountUpdate: Hashed<AccountUpdate> = HashedAccountUpdate.provable;
children​
children: MerkleListBase<AccountUpdateTreeBase>;
id​
id: number = RandomId;

Inherited from​

MerkleList.startIteratingFromLast

Source​

lib/provable/merkle-list.ts:199

assertConstant()​

static assertConstant(forest: AccountUpdateForestBase): void

Parameters​

• forest: AccountUpdateForestBase

Returns​

void

Source​

lib/mina/account-update.ts:1296

create()​

static create<T>(
   type: ProvableHashable<T>, 
   nextHash: (hash: Field, value: T) => Field, 
   emptyHash_: Field): typeof MerkleList & {
  "empty": () => MerkleList<T>;
  "from": (array: T[]) => MerkleList<T>;
  "fromReverse": (array: T[]) => MerkleList<T>;
  "provable": ProvableHashable<MerkleList<T>>;
}

Create a Merkle list type

Optionally, you can tell create() how to do the hash that pushes a new list element, by passing a nextHash function.

Type parameters​

• T

Parameters​

• type: ProvableHashable\<T>

• nextHash= undefined

• emptyHash_: Field= emptyHash

Returns​

typeof MerkleList & { "empty": () => MerkleList\<T>; "from": (array: T[]) => MerkleList\<T>; "fromReverse": (array: T[]) => MerkleList\<T>; "provable": ProvableHashable\<MerkleList\<T>>; }

Inherited from​

MerkleList.create

Example​

class MyList extends MerkleList.create(Field, (hash, x) =>
  Poseidon.hashWithPrefix('custom', [hash, x])
) {}

Source​

lib/provable/merkle-list.ts:216

fromFlatArray()​

static fromFlatArray(updates: AccountUpdate[]): AccountUpdateForest

Parameters​

• updates: AccountUpdate[]

Returns​

AccountUpdateForest

Source​

lib/mina/account-update.ts:1265

toFlatArray()​

static toFlatArray(
   forest: AccountUpdateForestBase, 
   mutate: boolean, 
   depth: number): AccountUpdate[]

Parameters​

• forest: AccountUpdateForestBase

• mutate: boolean= true

• depth: number= 0

Returns​

AccountUpdate[]

Source​

lib/mina/account-update.ts:1269