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fix(transaction): use eth_gasPrice RPC for Legacy transaction gas estimation 

- Changed getGasPrice() to use eth_gasPrice RPC method instead of calculating
  from baseFeePerGas (which is for EIP-1559 transactions)
- Added 10% buffer to gas price to ensure transaction gets included
- Updated Home.tsx to use gasPrice instead of maxFeePerGas for display

KAVA doesn't support EIP-1559, so we must use Legacy (Type 0) transactions
with gasPrice from eth_gasPrice RPC.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
hailin 2025-12-31 12:48:41 -08:00
parent 0f8e9cf228
commit c0229a1139
2 changed files with 20 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
backend/mpc-system/services/service-party-app/src/pages/Home.tsx
View File

@ -317,8 +317,8 @@ export default function Home() {
}; };
// 格式化 gas 费用显示 // 格式化 gas 费用显示
const formatGasFee = (gasLimit: bigint, maxFeePerGas: bigint): string => { const formatGasFee = (gasLimit: bigint, gasPrice: bigint): string => {
const maxFee = gasLimit * maxFeePerGas; const maxFee = gasLimit * gasPrice;
const feeKava = Number(maxFee) / 1e18; const feeKava = Number(maxFee) / 1e18;
return feeKava.toFixed(8).replace(/\.?0+$/, ''); return feeKava.toFixed(8).replace(/\.?0+$/, '');
}; };
@ -583,7 +583,7 @@ export default function Home() {
<div className={styles.confirmRow}> <div className={styles.confirmRow}>
<span className={styles.confirmLabel}>预估 Gas 费</span> <span className={styles.confirmLabel}>预估 Gas 费</span>
<span className={styles.confirmValue}> <span className={styles.confirmValue}>
~{formatGasFee(preparedTx.gasLimit, preparedTx.maxFeePerGas)} KAVA ~{formatGasFee(preparedTx.gasLimit, preparedTx.gasPrice)} KAVA
</span> </span>
</div> </div>
<div className={styles.confirmRow}> <div className={styles.confirmRow}>

30
backend/mpc-system/services/service-party-app/src/utils/transaction.ts
View File

@ -335,33 +335,37 @@ export async function getNonce(address: string): Promise<number> {
/** /**
* 通过 RPC 获取当前 gas 价格 * 通过 RPC 获取当前 gas 价格
* 使用 eth_gasPrice 方法获取 Legacy 交易的 gasPrice
*/ */
export async function getGasPrice(): Promise<{ maxFeePerGas: bigint; maxPriorityFeePerGas: bigint }> { export async function getGasPrice(): Promise<{ maxFeePerGas: bigint; maxPriorityFeePerGas: bigint }> {
const rpcUrl = getCurrentRpcUrl(); const rpcUrl = getCurrentRpcUrl();
// 获取基础费用 // 使用 eth_gasPrice 获取建议的 gas 价格
const blockResponse = await fetch(rpcUrl, { const response = await fetch(rpcUrl, {
method: 'POST', method: 'POST',
headers: { 'Content-Type': 'application/json' }, headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ body: JSON.stringify({
jsonrpc: '2.0', jsonrpc: '2.0',
method: 'eth_getBlockByNumber', method: 'eth_gasPrice',
params: ['latest', false], params: [],
id: 1, id: 1,
}), }),
}); });
const blockData = await blockResponse.json(); const data = await response.json();
const baseFeePerGas = blockData.result?.baseFeePerGas let gasPrice: bigint;
? BigInt(blockData.result.baseFeePerGas)
: BigInt(1000000000); // 默认 1 gwei
// 优先费用设为 1 gwei if (data.result) {
const maxPriorityFeePerGas = BigInt(1000000000); gasPrice = BigInt(data.result);
// 最大费用 = 基础费用 * 2 + 优先费用 // 增加 10% 以确保交易能被打包
const maxFeePerGas = baseFeePerGas * 2n + maxPriorityFeePerGas; gasPrice = gasPrice * 110n / 100n;
} else {
// 默认 1 gwei
gasPrice = BigInt(1000000000);
}
return { maxFeePerGas, maxPriorityFeePerGas }; // 为了兼容性，同时返回 maxFeePerGas (实际上用作 gasPrice)
return { maxFeePerGas: gasPrice, maxPriorityFeePerGas: gasPrice };
} }
/** /**