Snowbridge: Update Bridge Pricing Parameters to Lower Transfer Fees

When Snowbridge was launched the transfer fees were calculated based on the following parameters which reflected market conditions at the time:

Worst Case Gas price: 60 Gwei
ETH:DOT exchange rate: 1:450

This resulted in price in the following prices:

11.456568 DOT to transfer from Polkadot to Ethereum.
0.000399 ETH to transfer from Ethereum to Polkadot.

This proposal will change the pricing parameters to:

Worst Case Gas price: 25 Gwei
ETH:DOT exchange rate: 1:566

Resulting in the following fees:

6.1278015332 DOT to transfer from Polkadot to Ethereum.
0.000317 ETH to transfer from Ethereum to Polkadot.

Old Pricing Params:

setPricingParameters({
    exchangeRate: 2,222,222,222,222,222
    rewards: {
        local: 100,000,000
        remote: 250,000,000,000,000
    }
    feePerGas: 60,000,000,000
    multiplier: 1,333,333,333,333,333,333
})

New Pricing Params:

setPricingParameters({
    exchangeRate: 1,766,784,452,296,820
    rewards: {
        local: 100,000,000
        remote: 250,000,000,000,000
    }
    feePerGas: 25,000,000,000
    multiplier: 1,333,333,333,333,333,333
})

Edited

Snowbridge is a system that helps transfer money between Polkadot and Ethereum. When it started, the fees to move money were based on some numbers that made sense at the time. These numbers were:

The worst gas price was 60 Gwei.
The exchange rate between ETH and DOT was 1:450.

This made the fees:

11.456568 DOT to move from Polkadot to Ethereum.
0.000399 ETH to move from Ethereum to Polkadot.

Now, there's a new plan to change these numbers to:

The worst gas price will be 25 Gwei.
The exchange rate between ETH and DOT will be 1:566.

With these new numbers, the fees will be:

6.1278015332 DOT to move from Polkadot to Ethereum.
0.000317 ETH to move from Ethereum to Polkadot.

The old numbers were:

Exchange rate: 2,222,222,222,222,222
Rewards: local 100,000,000, remote 250,000,000,000,000
Fee per gas: 60,000,000,000
Multiplier: 1,333,333,333,333,333,333

The new numbers will be:

Exchange rate: 1,766,784,452,296,820
Rewards: local 100,000,000, remote 250,000,000,000,000
Fee per gas: 25,000,000,000
Multiplier: 1,333,333,333,333,333,333

Source