Introduction to Signature Transactions
Signature transactions are fundamental actions on the Ethereum Virtual Machine (EVM) blockchain, requiring explicit user approval via cryptographic signatures. These transactions enable:
- Token transfers
- Smart contract interactions
- State changes on the blockchain
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Transaction Types and Parameters
Traditional Transactions
| Parameter | Description |
|---|---|
| Gas Price | User-defined fee per gas unit (measured in Gwei) |
| Gas Limit | Maximum gas units allocated for the transaction |
| To Address | Recipient's Ethereum address (hex format) |
| Value | Amount of native currency to send (in wei) |
| Data Field | Contains encoded contract calls or deployment bytecode |
Key considerations:
- Higher gas prices = faster confirmation
- Unused gas is automatically refunded
EIP-1559 Transactions
Introduced in Ethereum's London upgrade, this fee mechanism includes:
- Base Fee: Dynamically adjusted by network demand (burned)
- Priority Fee: Directly compensates validators
Parameters:
maxPriorityFeePerGas(miner tip)maxFeePerGas(total maximum fee)
Implementation Guide
Browser Extension Integration
// Example using OKX Wallet extension
await okxwallet.request({
method: 'eth_sendTransaction',
params: [{
from: '0x...',
to: '0x...',
value: '0x...',
gasLimit: '0x...',
maxPriorityFeePerGas: '0x...',
maxFeePerGas: '0x...'
}]
});DEX API Considerations
When integrating with decentralized exchanges:
- Always verify contract addresses
- Use proper gas estimation for swaps
- Handle slippage tolerance in transaction parameters
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Frequently Asked Questions
How long do pending transactions stay valid?
Transactions typically expire after 24 hours if not mined. You may need to resubmit with higher fees.
Can I cancel a sent transaction?
Yes, by submitting a new transaction with the same nonce but higher fee before the original is confirmed.
Why would a transaction fail?
Common reasons include:
- Insufficient gas limit
- Low token balance
- Invalid contract call
What's the difference between ETH and token transfers?
ETH transfers only require the 'value' field, while token transfers need encoded contract calls in the 'data' field.
How do I estimate proper gas fees?
Most wallets provide automatic estimation, but you can check current network conditions using block explorers.
Is EIP-1559 mandatory?
While supported by most modern chains, some Layer 2 solutions may use alternative fee mechanisms.
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