Add Links to Gas Estimation Docs

Author: danforbes

docs/docs/guides/04_transactions/gas-and-fees.md

@@ -85,7 +85,9 @@ const transaction: Transaction = {
 };
 ```
 
-The following example demonstrates creating an access list for a transaction that invokes a smart contract function:
+## Smart Contract Fees
+
+The following example demonstrates specifying fee data and creating an access list for a transaction that invokes a [smart contract](/guides/smart_contracts/smart_contracts_guide) function:
 
 ```ts
 const transfer: NonPayableMethodObject = erc20.methods.transfer(receiver.address, 1);
@@ -94,9 +96,15 @@ const transferOpts: NonPayableCallOptions = { from: sender.address };
 const accessListResult: AccessListResult = await transfer.createAccessList(transferOpts);
 const transactionDraft: Transaction = transfer.populateTransaction(transferOpts);
 
+const feeData: FeeData = await web3.eth.calculateFeeData();
+
 const transferTxn: Transaction = {
 	...transactionDraft,
+	maxFeePerGas: feeData.maxFeePerGas,
+	maxPriorityFeePerGas: feeData.maxPriorityFeePerGas,
 	accessList: accessListResult.accessList,
 	gas: accessListResult.gasUsed,
 };
+
+const receipt: TransactionReceipt = await web3.eth.sendTransaction(transferTxn);
 ```

docs/docs/guides/04_transactions/transactions.md

@@ -231,6 +231,10 @@ Final receiver balance: 100n
 
 Note that the sender's balance has decreased by more than the amount that was transferred to the receiver. This is because the sender's balance is also used to pay for the transaction's [gas fees](https://ethereum.org/en/developers/docs/gas/). The transaction receipt specifies the amount of gas that was used (`cumulativeGasUsed`) and the gas price in wei (`effectiveGasPrice`). The total amount deducted from the sender's balance is equal to the amount transferred plus the cost of the gas fees (`cumulativeGasUsed` multiplied by `effectiveGasPrice`).
 
+:::info
+Gas and other fees are important topics for Ethereum developers to understand. Refer to the [Gas and Priority Fees guide](/guides/transactions/gas-and-fees) to learn more.
+:::
+
 ## Step 5: Send a Transaction and Subscribe to Its Events
 
 In the previous example, the `transaction-receipt.js` script demonstrates sending a transaction to the network and reviewing the results after it has been successfully received. However, there are more stages to the [transaction lifecycle](https://ethereum.org/en/developers/docs/transactions/#transaction-lifecycle) and Web3.js makes it easy to subscribe to these lifecycle stages and create custom handlers for each one. Web3.js supports subscriptions for the following transaction lifecycle events:

docs/docs/guides/05_smart_contracts/mastering_smart_contracts.md

@@ -200,6 +200,10 @@ contract.methods.METHOD_NAME(METHOD_PARAMETERS).send({ from: '0x...' });
 contract.methods.METHOD_NAME(METHOD_PARAMETERS).call();
 ```
 
+:::tip
+Refer to the [Gas and Priority Fees guide](/guides/transactions/gas-and-fees#smart-contract-fees) to learn how to control and optimize fees when using Web3.js to interact with smart contracts.
+:::
+
 -   **events**: An object mapping your contract's events, allowing you to subscribe to them.
 
     And here is an example on how to use it:

docs/docs/guides/05_smart_contracts/smart_contracts_guide.md

@@ -362,6 +362,10 @@ interact();
 
 This code uses the previously generated ABI and contract address to instantiate a [`Contract`](/api/web3-eth-contract/class/Contract) object for interacting with the `MyContract` smart contract. It gets the current value of `myNumber` from `MyContract`, logs it, updates it, and gets its updated value. It logs the updated `myNumber` value and the [transaction hash](https://help.coinbase.com/en-au/coinbase/getting-started/crypto-education/what-is-a-transaction-hash-hash-id) to the console.
 
+:::info
+For the purposes of this tutorial, the above script uses relatively arbitrary values for `gas` and `gasPrice` when demonstrating how to interact with a smart contract. Refer to the [Gas and Priority Fees guide](/guides/transactions/gas-and-fees#smart-contract-fees) to learn how to properly set these values.
+:::
+
 Run the following command to interact with the smart contract:
 
 ```bash