# Chainlink

| Syntax                                                    | Type    | Description                                        | Default |
| --------------------------------------------------------- | ------- | -------------------------------------------------- | ------- |
| [ethereumChainId](#ethereumchainid)                       | number  | Ethereum chain id                                  |         |
| [linkContractAddress](#linkcontractaddress)               | string  | Link contract address                              |         |
| [ethereumWsEndpoint](#ethereumwsendpoint)                 | string  | Ethereum node WebSocket server endpoint            |         |
| [ethereumHttpEndpoints](#ethereumhttpendpoints)           | array   | Ethereum HTTP endpoints                            |         |
| [databaseURL](#databaseurl)                               | string  | Postgres database connection URL                   |         |
| [keystorePasswordSecretName](#keystorepasswordsecretname) | string  | k8s secret name that holds keystore password       |         |
| [apiCredentials](#apicredentials)                         | object  | API credentials                                    |         |
| [corsDomains](#corsdomains)                               | array   | Domains from which to accept cross origin requests | \*      |
| [certSecretName](#certsecretname)                         | string  | k8s secret name that holds tls.key and tls.crt     |         |
| [apiPort](#apiport)                                       | number  | Port used for node API and GUI                     | 6688    |
| [tlsPort](#tlsport)                                       | number  | Port used for HTTPS connections                    | 6689    |
| [p2pPort](#p2pport)                                       | number  | Port used for p2p communcations                    | 30303   |
| [secureCookies](#securecookies)                           | boolean | Enable secure cookies for authentication           | false   |
| [logging](#logging)                                       | string  | Logging verbosity level                            | info    |
| [resources](#resources)                                   | object  | node compute and storage resources to alloacte     |         |

## ethereumChainId

`ethereumChainId` is ethereum chain id.

## linkContractAddress

`linkContractAddress` is Link contract address.

## ethereumWsEndpoint

`ethereumWsEndpoint` is Ethereum node's WebSocket server endpoint.

## ethereumHttpEndpoints

`ethereumHttpEndpoints` is array of Ethereum HTTP endpoints used for heavy requests and as fallback in case of Ethereum node bug or failure.

## databaseURL

`databaseURL` is Postgres database connection URL.

## keystorePasswordSecretName

`keystorePasswordSecretName` is k8s secret name that holds keystore (wallet) password in data field called `password`.

## apiCredentials

`apiCredentials` is the credetials used to access Chainlink node UI:

| Syntax             | Type   | Description                                                         |
| ------------------ | ------ | ------------------------------------------------------------------- |
| email              | string | User email                                                          |
| passwordSecretName | string | k8s secret name that holds password in data field called `password` |

## corsDomains

`corsDomains` is a list of domains from which to accept cross origin requests.

## certSecretName

`certSecretName` is k8s secret name that holds TLS private key in `tls.key` data field and TLS certificate in `tls.crt` data field.

## apiPort

`apiPort` is the port used for node API and GUI.

## tlsPort

`tlsPort` is the port used for HTTPS connections.

## p2pPort

`p2pPort` is the port used for p2p communcations.

## secureCookies

`secureCookies` enables secure cookies for authentication.

## logging

`logging` is logging verbosity level. Possible values are `debug`, `info`, `warn`, `error`, and `panic`.

## resources

`resources` allocates compute and storage resources to the node.

| Syntax       | Type   | Description                                 | Default                                                                                    |
| ------------ | ------ | ------------------------------------------- | ------------------------------------------------------------------------------------------ |
| cpu          | string | number of cpu cores this node requires      | `2`                                                                                        |
| cpuLimit     | string | number of cpu cores this node is limited to | `4`                                                                                        |
| memory       | string | memory this node requires                   | `2Gi`                                                                                      |
| memoryLimit  | string | memory this node is limited to              | `4Gi`                                                                                      |
| storage      | string | disk space this node requires               | `20Gi`                                                                                     |
| storageClass | string | Node volume storage class                   | Cluster's default storage class will be used as defined by cluster admin or cloud provider |

memory and storage requests and limits must use the pattern `^[1-9][0-9]*[KMGTPE]i$` for example `1500Mi`, `30Gi`, and `1Ti`.

cpu requests and limits must use the pattern `^[1-9][0-9]*m?$` for example `1000m` (which is equal to `1`), `1500m`, `2`, and `4.`

`cpuLimit` can't be less than `cpu`.

`memoryLimit` can't be less than or equal to `memory`.

`storageClass` field is immutable, it cannot be changed after creation.