Re-send funding ETH tx if not executed in long time

[boqiu]

This change is 

[Copilot]

Pull request overview

Adds resilience to the TokenPay sponsorship flow by monitoring the funding ETH transaction and re-sending it with a higher gas price if it isn’t executed for an extended period, plus factoring common tx utilities into TxSender.

Changes:

• Introduce TxSender.SendRawTransactionWithRetry and TxSender.WaitForReceipt to centralize raw-tx send retry and receipt polling logic.
• Update TokenPay monitoring to wait for funding tx completion via waitForFundingTx, including periodic re-send with increased gas price.
• Improve TokenPay logging consistency by reusing a module-scoped logger entry across the async monitor flow.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
service/tx_sender.go	Adds reusable raw-tx retry send and receipt polling helpers used by services.
service/token_pay.go	Adds funding-tx monitoring with gas-price bump re-send strategy and updates monitor flow to use shared TxSender helpers.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

Comments suppressed due to low confidence (1)

service/token_pay.go:273

• After the nonce advances, the code does a single pass over TransactionReceipt for each hash and immediately fails if receipts aren’t available yet. On some nodes there can be a short lag between the nonce updating (tx mined) and the receipt being retrievable, which can cause false failures even though the funding tx succeeded.

	for _, v := range txs {
		if receipt, err = tp.client.Eth.TransactionReceipt(v); err != nil {
			logger.WithError(err).WithField("txHash", v).Info("Failed to get receipt of funding ETH tx")
		} else if receipt != nil {
			break