eth_estimateGas is not supplied the gasPrice parameter

[wjmelements]

Because Ethereum transactions can call the GASPRICE opcode (3a) and branch on it, eth_estimateGas without a gasPrice parameter can return inaccurate results. Transactions that do not supply enough gasLimit will revert.

You can test this by estimating gas on a TrueUSD transfer. The gasLimit required is approximately 21k higher for a 40 gwei tx than for a 1 wei tx.

A discussion of this issue for another project is here.

TrueUSD is the rank 4 ERC20 token by market cap. Please prioritize this issue so your users can use TrueUSD.

[wjmelements]

We have temporarily lowered the refund threshold in order to alleviate the issue. The lower gasPrice to test with is now 1 wei.

You can also use the contract at 0x28a958cD020efeA3734a0bb36DDdc5F9B872cEa8 to test your estimateGas fix.

[shamatar]

@wjmelements Great point. I’ve totally forgot it when was making the original implementation. @BaldyAsh can you quickly fix this?

[BaldyAsh]

@wjmelements hi! Think I've fixed it, but need some tusd for test . Could you provide some? If yes, then my address: 0x4fd693F57e63714591A07A73A4D7AD84e5cCdE10

[BaldyAsh]

@wjmelements Tested on contract you've posted to this discussion. Closed by #199.
If there will be some problems just re-open this issue