ChainStorageContainer.md

# ChainStorageContainer



> ChainStorageContainer



*The Chain Storage Container provides its owner contract with read, write and delete functionality. This provides gas efficiency gains by enabling it to overwrite storage slots which can no longer be used in a fraud proof due to the fraud window having passed, and the associated chain state or transactions being finalized. Three distinct Chain Storage Containers will be deployed on Layer 1: 1. Stores transaction batches for the Canonical Transaction Chain 2. Stores queued transactions for the Canonical Transaction Chain 3. Stores chain state batches for the State Commitment Chain*

## Methods

### deleteElementsAfterInclusive

```solidity
function deleteElementsAfterInclusive(uint256 _index) external nonpayable
```

Removes all objects after and including a given index. Also allows setting the global metadata field.



#### Parameters

| Name | Type | Description |
|---|---|---|
| _index | uint256 | Object index to delete from.

### get

```solidity
function get(uint256 _index) external view returns (bytes32)
```

Retrieves an object from the container.



#### Parameters

| Name | Type | Description |
|---|---|---|
| _index | uint256 | Index of the particular object to access.

#### Returns

| Name | Type | Description |
|---|---|---|
| _0 | bytes32 | 32 byte object value.

### getGlobalMetadata

```solidity
function getGlobalMetadata() external view returns (bytes27)
```

Retrieves the container's global metadata field.




#### Returns

| Name | Type | Description |
|---|---|---|
| _0 | bytes27 | Container global metadata field.

### length

```solidity
function length() external view returns (uint256)
```

Retrieves the number of objects stored in the container.




#### Returns

| Name | Type | Description |
|---|---|---|
| _0 | uint256 | Number of objects in the container.

### libAddressManager

```solidity
function libAddressManager() external view returns (contract Lib_AddressManager)
```






#### Returns

| Name | Type | Description |
|---|---|---|
| _0 | contract Lib_AddressManager | undefined

### owner

```solidity
function owner() external view returns (string)
```






#### Returns

| Name | Type | Description |
|---|---|---|
| _0 | string | undefined

### push

```solidity
function push(bytes32 _object) external nonpayable
```

Pushes an object into the container. Function allows setting the global metadata since we'll need to touch the "length" storage slot anyway, which also contains the global metadata (it's an optimization).



#### Parameters

| Name | Type | Description |
|---|---|---|
| _object | bytes32 | A 32 byte value to insert into the container.

### resolve

```solidity
function resolve(string _name) external view returns (address)
```

Resolves the address associated with a given name.



#### Parameters

| Name | Type | Description |
|---|---|---|
| _name | string | Name to resolve an address for.

#### Returns

| Name | Type | Description |
|---|---|---|
| _0 | address | Address associated with the given name.

### setGlobalMetadata

```solidity
function setGlobalMetadata(bytes27 _globalMetadata) external nonpayable
```

Sets the container's global metadata field. We're using `bytes27` here because we use five bytes to maintain the length of the underlying data structure, meaning we have an extra 27 bytes to store arbitrary data.



#### Parameters

| Name | Type | Description |
|---|---|---|
| _globalMetadata | bytes27 | New global metadata to set.