Add web3.js-eea reference doc (#1617)

Signed-off-by: Adrian Sutton <adrian.sutton@consensys.net>

docs/Privacy/How-To/eeajs.md

@@ -57,3 +57,7 @@ to get the contract binary.
     ```
 
 The transaction hash is returned. To get the private transaction receipt, use `web3.eea.getTransactionReceipt(txHash)`. 
+
+## Reference 
+
+Refer to [web3.js-eea reference](../../Reference/web3js-eea-Methods.md) for more methods and examples. 

docs/Reference/web3js-eea-Methods.md

@@ -0,0 +1,146 @@
+description: web3js-eea methods reference
+<!--- END of page meta data -->
+
+# web3js-eea 
+
+Use the [web3.js-eea library](https://github.com/PegaSysEng/eeajs) to [create and send 
+private transactions](../Privacy/How-To/Creating-Sending-Private-Transactions.md).
+
+## Options Parameter 
+
+The Options parameter is used by: 
+
+* [`generatePrivacyGroup`](#generateprivacygroup)
+* [`getTransactionCount`](#gettransactioncount)
+* [`sendRawParameter`](#sendrawtransaction)
+
+The Options parameter has the following properties: 
+
+* `privateKey`: Ethereum private key with which to sign the transaction
+* `privateFrom` : Orion public key of the sender
+* `privateFor` : Orion public keys of recipients
+* `nonce` : Optional. If not provided, calculated using [`eea_getTransctionCount`](../Reference/Pantheon-API-Methods.md).
+* `to` : Optional. Contract address to send the transaction to. Do not specify for contract deployment transactions
+* `data` : Transaction data
+
+## generatePrivacyGroup
+    
+Generates the privacy group ID. The privacy group ID is the RLP-encoded `privateFor` and `privateFrom` keys.
+    
+**Parameters**
+    
+[Transaction options](#options-parameter)
+    
+**Returns**
+    
+`string` : Privacy group ID 
+
+!!! example
+    ```bash
+    const privacyGroupId = web3.eea.generatePrivacyGroup({
+      privateFrom: "A1aVtMxLCUHmBVHXoZzzBgPbW/wj5axDpW9X8l91SGo=",
+      privateFor: ["Ko2bVqD+nNlNYL5EE7y3IdOnviftjiizpjRt+HTuFBs="]
+    });
+    ```
+
+## getMarkerTransaction
+
+Gets the [privacy marker transaction](../Privacy/Explanation/Private-Transaction-Processing.md) transaction receipt.
+
+**Parameters**
+
+`txHash` - `string` : Transaction hash of the private transaction
+
+`retries` - `int` : Maximum number of attempts to get the private marker transaction receipt 
+
+`delay` - `int` : Delay between retries in milliseconds
+
+**Returns**
+
+Privacy marker transaction receipt 
+
+!!! example
+    ```bash
+    const privateMarkerTransacion = web3.eea.getMarkerTransaction("0x9c41b3d44ed73511c82a9e2b1ef581eb797475c82f318ca2802358d3ba4a8274", 5, 100);
+    ```
+        
+## getTransactionCount 
+
+Returns the number of transactions sent from the specified address for the privacy group.
+
+**Parameters**
+
+[Transaction options](#options-parameter)
+
+**Returns**
+
+`int` : Transaction count for that account (`privateKey`) and privacy group
+
+!!! example
+    ```bash
+    return web3.eea
+       .getTransactionCount({
+       privateKey: pantheon.node1.privateKey,
+       privateFrom: orion.node1.publicKey,
+       privateFor: [orion.node2.publicKey],
+    })
+    ```
+        
+## getTransactionReceipt 
+
+Gets the private transaction receipt using [`eea_getTransactionReceipt`](../Reference/Pantheon-API-Methods.md#eea_gettransactionreceipt).
+
+**Parameters**
+
+`txHash` - `string` : Transaction hash of the private transaction
+
+`enclavePublicKey` - `string` : [`privateFrom` key for the transaction](#options-parameter) 
+
+`retries` - `int` : Optional. Maximum number of attempts to get the private marker transaction receipt. Default is `300`. 
+
+`delay` - `int` : Optional. Delay between retries in milliseconds. Default is `1000`.
+
+**Returns**
+
+Private transaction receipt 
+
+!!! example
+    ```bash
+    const privateTxReceipt = web3.eea.getTransactionReceipt("0x9c41b3d44ed73511c82a9e2b1ef581eb797475c82f318ca2802358d3ba4a8274", "A1aVtMxLCUHmBVHXoZzzBgPbW/wj5axDpW9X8l91SGo=");
+    ```
+    
+## sendRawTransaction 
+
+Signs and sends a RLP-encoded private transaction to Pantheon using [`eea_sendRawTransaction`](Pantheon-API-Methods.md#eea_sendrawtransaction). 
+
+**Parameters**
+
+[Transaction options](#options-parameter)
+
+**Returns**
+
+`string` : Transaction hash of the [`privacy marker transaction`](../Privacy/Explanation/Private-Transaction-Processing.md)   
+        
+!!! example 
+    ```bash tab="Contract Deployment"
+    const createPrivateEmitterContract = () => {
+      const contractOptions = {
+         data: `0x${binary}`,
+         privateFrom: orion.node1.publicKey,
+         privateFor: [orion.node2.publicKey],
+         privateKey: pantheon.node1.privateKey
+      };
+      return web3.eea.sendRawTransaction(contractOptions);
+    };
+    ```
+            
+    ```bash tab="Contract Invocation"
+    const functionCall = {
+      to: address,
+      data: functionAbi.signature + functionArgs,
+      privateFrom: orion.node1.publicKey,
+      privateFor: [orion.node2.publicKey],
+      privateKey: pantheon.node1.privateKey
+    };
+    return web3.eea.sendRawTransaction(functionCall);
+    ```