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\fix: snippets
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‎.chain-interactions/send-transactions/calculate-transaction-fees.md‎

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@@ -53,54 +53,7 @@ This command downloads the latest Polkadot metadata and generates TypeScript des
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Create a file named `papi-fee-calculator.ts`:
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```typescript title="papi-fee-calculator.ts"
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import { createClient } from "polkadot-api";
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import { withPolkadotSdkCompat } from "polkadot-api/polkadot-sdk-compat";
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import { polkadotTestNet } from "@polkadot-api/descriptors";
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import { getWsProvider } from "polkadot-api/ws-provider";
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async function calculateFees() {
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// Connect to chain
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const client = createClient(
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withPolkadotSdkCompat(getWsProvider("INSERT_WS_ENDPOINT"))
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);
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// Get typed API
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const api = client.getTypedApi(polkadotTestNet);
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// Define sender and recipient addresses
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const aliceAddress = "INSERT_ALICE_ADDRESS";
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const bobAddress = "INSERT_BOB_ADDRESS";
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// Amount to transfer (1 DOT = 10^10 plancks)
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const amount = 1_000_000_000_000n; // 1 DOT
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try {
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// Create the transaction
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const tx = api.tx.Balances.transfer_keep_alive({
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dest: {
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type: "Id",
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value: bobAddress,
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},
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value: amount,
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});
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// Estimate fees
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const estimatedFees = await tx.getEstimatedFees(aliceAddress);
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console.log(`Estimated fee: ${Number(estimatedFees) / 1e10} DOT`);
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console.log(`Transaction amount: ${Number(amount) / 1e10} DOT`);
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console.log(
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`Total deducted: ${Number(estimatedFees + amount) / 1e10} DOT`
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);
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} catch (error) {
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console.error("Error calculating fees:", error);
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} finally {
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// Clean up
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client.destroy();
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}
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}
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calculateFees();
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--8<-- 'code/chain-interactions/send-transactions/calculate-transaction-fees/papi-fee-calculator.ts'
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```
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Ensure to replace `INSERT_WS_ENDPOINT` with your WebSocket endpoint, `INSERT_ALICE_ADDRESS` with the sender's address, and `INSERT_BOB_ADDRESS` with the recipient's address.
@@ -120,13 +73,7 @@ npx tsx papi-fee-calculator.ts
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You should see output similar to:
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<div class="termynal" data-termynal>
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<span data-ty="input"><span class="file-path"></span>npx tsx papi-fee-calculator.ts</span>
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<span data-ty="progress"></span>
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<span data-ty>Estimated fee: 0.0014668864 DOT</span>
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<span data-ty>Transaction amount: 100 DOT</span>
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<span data-ty>Total deducted: 100.0014668864 DOT</span>
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</div>
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--8<-- 'code/chain-interactions/send-transactions/calculate-transaction-fees/papi-fee-calculator-output.html'
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## Polkadot.js API
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@@ -141,44 +88,7 @@ npm install @polkadot/api
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Create a file named `polkadotjs-fee-calculator.ts`:
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```typescript title="polkadotjs-fee-calculator.ts"
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import { ApiPromise, WsProvider } from "@polkadot/api";
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async function calculateFees() {
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// Connect to chain
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const wsProvider = new WsProvider("INSERT_WS_ENDPOINT");
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const api = await ApiPromise.create({ provider: wsProvider });
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// Wait for API to be ready
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await api.isReady;
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// Define sender and recipient addresses
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const aliceAddress = "INSERT_ALICE_ADDRESS";
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const bobAddress = "INSERT_BOB_ADDRESS";
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// Amount to transfer (1 DOT = 10^10 plancks)
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const amount = 1_000_000_000_000n; // 1 DOT
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try {
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// Create the transaction
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const tx = api.tx.balances.transferKeepAlive(bobAddress, amount);
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// Get payment information
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const paymentInfo = await tx.paymentInfo(aliceAddress);
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console.log(`Estimated fee: ${Number(paymentInfo.partialFee.toBigInt()) / 1e10} DOT`);
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console.log(`Transaction amount: ${Number(amount) / 1e10} DOT`);
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console.log(
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`Total deducted: ${Number(paymentInfo.partialFee.toBigInt() + amount) / 1e10} DOT`
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);
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} catch (error) {
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console.error("Error calculating fees:", error);
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} finally {
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// Clean up
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await api.disconnect();
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}
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}
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calculateFees();
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--8<-- 'code/chain-interactions/send-transactions/calculate-transaction-fees/polkadotjs-fee-calculator.ts'
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```
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Ensure to replace `INSERT_WS_ENDPOINT` with your WebSocket endpoint, `INSERT_ALICE_ADDRESS` with the sender's address, and `INSERT_BOB_ADDRESS` with the recipient's address.
@@ -197,13 +107,7 @@ npx tsx polkadotjs-fee-calculator.ts
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198108
You should see output similar to:
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<div class="termynal" data-termynal>
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<span data-ty="input"><span class="file-path"></span>npx tsx polkadotjs-fee-calculator.ts</span>
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<span data-ty="progress"></span>
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<span data-ty>Estimated fee: 0.0014668864 DOT</span>
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<span data-ty>Transaction amount: 100 DOT</span>
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<span data-ty>Total deducted: 100.0014668864 DOT</span>
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</div>
110+
--8<-- 'code/chain-interactions/send-transactions/calculate-transaction-fees/polkadotjs-fee-calculator-output.html'
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## Polkadot-JS Apps Interface
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‎.snippets/code/chain-interactions/send-transactions/calculate-transaction-fees/papi-fee-calculator-output.html‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,7 @@
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<div class="termynal" data-termynal>
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<span data-ty="input"><span class="file-path"></span>npx tsx papi-fee-calculator.ts</span>
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<span data-ty="progress"></span>
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<span data-ty>Estimated fee: 0.0014668864 DOT</span>
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<span data-ty>Transaction amount: 100 DOT</span>
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<span data-ty>Total deducted: 100.0014668864 DOT</span>
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</div>

‎.snippets/code/chain-interactions/send-transactions/calculate-transaction-fees/papi-fee-calculator.ts‎

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import { createClient } from "polkadot-api";
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import { withPolkadotSdkCompat } from "polkadot-api/polkadot-sdk-compat";
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import { polkadotTestNet } from "@polkadot-api/descriptors";
4+
import { getWsProvider } from "polkadot-api/ws-provider";
5+
6+
async function calculateFees() {
7+
// Connect to chain
8+
const client = createClient(
9+
withPolkadotSdkCompat(getWsProvider("INSERT_WS_ENDPOINT"))
10+
);
11+
12+
// Get typed API
13+
const api = client.getTypedApi(polkadotTestNet);
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15+
// Define sender and recipient addresses
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const aliceAddress = "INSERT_ALICE_ADDRESS";
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const bobAddress = "INSERT_BOB_ADDRESS";
18+
19+
// Amount to transfer (1 DOT = 10^10 plancks)
20+
const amount = 1_000_000_000_000n; // 1 DOT
21+
22+
try {
23+
// Create the transaction
24+
const tx = api.tx.Balances.transfer_keep_alive({
25+
dest: {
26+
type: "Id",
27+
value: bobAddress,
28+
},
29+
value: amount,
30+
});
31+
32+
// Estimate fees
33+
const estimatedFees = await tx.getEstimatedFees(aliceAddress);
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console.log(`Estimated fee: ${Number(estimatedFees) / 1e10} DOT`);
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console.log(`Transaction amount: ${Number(amount) / 1e10} DOT`);
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console.log(
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`Total deducted: ${Number(estimatedFees + amount) / 1e10} DOT`
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);
40+
} catch (error) {
41+
console.error("Error calculating fees:", error);
42+
} finally {
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// Clean up
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client.destroy();
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}
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}
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calculateFees();

‎.snippets/code/chain-interactions/send-transactions/calculate-transaction-fees/polkadotjs-fee-calculator-output.html‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,7 @@
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<div class="termynal" data-termynal>
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<span data-ty="input"><span class="file-path"></span>npx tsx polkadotjs-fee-calculator.ts</span>
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<span data-ty="progress"></span>
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<span data-ty>Estimated fee: 0.0014668864 DOT</span>
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<span data-ty>Transaction amount: 100 DOT</span>
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<span data-ty>Total deducted: 100.0014668864 DOT</span>
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</div>

‎.snippets/code/chain-interactions/send-transactions/calculate-transaction-fees/polkadotjs-fee-calculator.ts‎

Lines changed: 38 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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import { ApiPromise, WsProvider } from "@polkadot/api";
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3+
async function calculateFees() {
4+
// Connect to chain
5+
const wsProvider = new WsProvider("INSERT_WS_ENDPOINT");
6+
const api = await ApiPromise.create({ provider: wsProvider });
7+
8+
// Wait for API to be ready
9+
await api.isReady;
10+
11+
// Define sender and recipient addresses
12+
const aliceAddress = "INSERT_ALICE_ADDRESS";
13+
const bobAddress = "INSERT_BOB_ADDRESS";
14+
15+
// Amount to transfer (1 DOT = 10^10 plancks)
16+
const amount = 1_000_000_000_000n; // 1 DOT
17+
18+
try {
19+
// Create the transaction
20+
const tx = api.tx.balances.transferKeepAlive(bobAddress, amount);
21+
22+
// Get payment information
23+
const paymentInfo = await tx.paymentInfo(aliceAddress);
24+
25+
console.log(`Estimated fee: ${Number(paymentInfo.partialFee.toBigInt()) / 1e10} DOT`);
26+
console.log(`Transaction amount: ${Number(amount) / 1e10} DOT`);
27+
console.log(
28+
`Total deducted: ${Number(paymentInfo.partialFee.toBigInt() + amount) / 1e10} DOT`
29+
);
30+
} catch (error) {
31+
console.error("Error calculating fees:", error);
32+
} finally {
33+
// Clean up
34+
await api.disconnect();
35+
}
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}
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calculateFees();

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