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Merge pull request #1530 from blocknative/release/2.20.1
Release 2.20.1
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124 changes: 124 additions & 0 deletions
124
docs/src/lib/components/TransactionPreviewButton.svelte
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| <script> | ||
| import { onMount } from 'svelte' | ||
| import { ethers } from 'ethers' | ||
| let transactionPreview | ||
| let blocknativeSdk | ||
| const buildTransaction = async () => { | ||
| const addressFrom = '0xab5801a7d398351b8be11c439e05c5b3259aec9b' | ||
| const CONTRACT_ADDRESS = '0x7a250d5630b4cf539739df2c5dacb4c659f2488d' | ||
| const erc20_interface = [ | ||
| 'function approve(address _spender, uint256 _value) public returns (bool success)', | ||
| 'function transferFrom(address sender, address recipient, uint256 amount) external returns (bool)', | ||
| 'function balanceOf(address owner) view returns (uint256)' | ||
| ] | ||
| const uniswapV2router_interface = [ | ||
| 'function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts)' | ||
| ] | ||
| const weth = '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2' | ||
| const uni = '0x1f9840a85d5af5bf1d1762f925bdaddc4201f984' | ||
| let swapTxData | ||
| let approveTxData | ||
| const createTransaction = async () => { | ||
| const swapContract = new ethers.Contract(CONTRACT_ADDRESS, uniswapV2router_interface) | ||
| const erc20_contract = new ethers.Contract(weth, erc20_interface) | ||
| const oneHundredUni = ethers.BigNumber.from('100000000000000000000') | ||
| approveTxData = await erc20_contract.populateTransaction.approve( | ||
| CONTRACT_ADDRESS, | ||
| oneHundredUni | ||
| ) | ||
| const amountOutMin = 0 | ||
| const amountOutMinHex = ethers.BigNumber.from(amountOutMin.toString())._hex | ||
| const path = [uni, weth] | ||
| const deadline = Math.floor(Date.now() / 1000) + 60 * 1 // 1 minutes from the current Unix time | ||
| const inputAmountHex = oneHundredUni.toHexString() | ||
| swapTxData = await swapContract.populateTransaction.swapExactTokensForETH( | ||
| inputAmountHex, | ||
| amountOutMinHex, | ||
| path, | ||
| addressFrom, | ||
| deadline | ||
| ) | ||
| } | ||
| await createTransaction() | ||
| const account_address = '0xab5801a7d398351b8be11c439e05c5b3259aec9b' | ||
| const uniswapV2Router = '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D' | ||
| return [ | ||
| { | ||
| from: account_address, | ||
| to: uni, | ||
| input: approveTxData.data, | ||
| gas: 1000000, | ||
| gasPrice: 48000000000, | ||
| value: 0 | ||
| }, | ||
| { | ||
| from: account_address, | ||
| to: uniswapV2Router, | ||
| input: swapTxData.data, | ||
| gas: 1000000, | ||
| gasPrice: 48000000000, | ||
| value: 0 | ||
| } | ||
| ] | ||
| } | ||
| const handlePreview = async () => { | ||
| await transactionPreview.init({ | ||
| apiKey: '133a026b-c7a0-419c-a00b-66255b3cd487', | ||
| sdk: blocknativeSdk, | ||
| containerElement: '#tp-container' | ||
| }) | ||
| const stubTrans = await buildTransaction() | ||
| await transactionPreview.previewTransaction(stubTrans) | ||
| } | ||
| onMount(async () => { | ||
| const { default: Blocknative } = await import('bnc-sdk') | ||
| const { default: transactionPreviewModule } = await import('@web3-onboard/transaction-preview') | ||
| blocknativeSdk = new Blocknative({ | ||
| dappId: '133a026b-c7a0-419c-a00b-66255b3cd487', | ||
| networkId: 1 | ||
| }) | ||
| transactionPreview = transactionPreviewModule({ | ||
| requireTransactionApproval: true | ||
| }) | ||
| }) | ||
| </script> | ||
|
|
||
| <div> | ||
| {#await blocknativeSdk && transactionPreview then Preview} | ||
| {#if Preview} | ||
| <button | ||
| class="rounded-lg bg-gray-inverse hover:bg-gray-hover hover:text-gray-inverse transition-all px-4 h-10 text-base text-gray-current" | ||
| on:click={() => handlePreview()} | ||
| > | ||
| Preview Transaction | ||
| </button> | ||
|
|
||
| <div id="tp-container" /> | ||
| {/if} | ||
| {/await} | ||
| </div> | ||
|
|
||
| <style> | ||
| #tp-container { | ||
| height: auto; | ||
| width: 316px; | ||
| margin-top: 12px; | ||
| } | ||
| </style> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,4 @@ | ||
| export * from './examples' | ||
| export * from './gas' | ||
| export { default as ThemeCustomizer } from './ThemeCustomizer.svelte' | ||
| export { default as TransactionPreviewButton } from './TransactionPreviewButton.svelte' |
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