How to determine the cost of deploying bundles?

[0xpatrickdev]

I am trying to figure out the cost for deploying bundles, via something like agd tx swingset install-bundle or agoric publish. I was pointed to the DefaultBeansPerStorageByte parameter, which currently seems to be set to 0.002.

Using the addCollateral bundles from inter protocol as a reference point, I have come up with these numbers:

Hash	Size	Cost per Byte	Cost
b1-1c8e93...	948,173 bytes	0.002	1,896.35
b1-8fb229...	1,456,129 bytes	0.002	2,912.26
b1-c185bf...	1,465,213 bytes	0.002	2,930.43
b1-e4ba9c...	1,114,541 bytes	0.002	2,229.08
Total	4,984,056 bytes		9,968.11

• These numbers seem a bit high, so I would I appreciate if someone could double check the calculation. I am assuming that the total is ~10,000 IST.
• Also, is there any way to query the value of DefaultBeansPerStorageByte from agd?

[dckc]

Contract Bundle Storage Currently 0.002 IST/byte

I was pointed to the DefaultBeansPerStorageByte parameter, which currently seems to be set to 0.002.

Yes, it's effectively 0.002 IST/byte currently. The value of that storageByte param is actually 2000000000 in units of "beans", and the ratio of beans to IST is feeUnit = 1000000000000.

Storage Price Subject To Governance

These numbers seem a bit high ...

I say "currently" because it can be changed by the BLD stakers using a Parameter Change governance proposal.

The value should be sufficient to recover the the cost of storing bundles on the chain forever / indefinitely.

For comparison, storage on Ethereum currently costs about 10x as much:

	gas	bytes	USD	gas price (gwei)	ETH price
eth	625	1	0.0223810125	22	1,627.71

• 20k gas / 256 bit word (32 bytes)
• gas price, eth price from https://etherscan.io/gastracker

Storage fees go to the reserve account

The vbank/reserve module account is agoric1ae0lmtzlgrcnla9xjkpaarq5d5dfez63h3nucl.

on agoricdev-20 it has 16,407.6 IST from recent deployment of bundles.

Querying Storage Price

is there any way to query the value of DefaultBeansPerStorageByte from agd?

yes: agd query swingset params.

If you don't have a local node running, for mainnet, you could use: agd --node=https://main.rpc.agoric.net:443 query swingset params

to get just the per-byte cost: agd --node=https://main.rpc.agoric.net:443 query swingset params -o json | jq '.beans_per_unit | .[] | select(.key=="storageByte")'

{
  "key": "storageByte",
  "beans": "2000000000"
}

The feeUnit lets us translate to IST:
gd --node=https://main.rpc.agoric.net:443 query swingset params -o json | jq '.beans_per_unit | .[] | select(.key=="storageByte" or .key=="feeUnit")'

{
  "key": "feeUnit",
  "beans": "1000000000000"
}
{
  "key": "storageByte",
  "beans": "2000000000"
}

[dckc]

How to reduce bundle size?

In due course, you should only need to pay for new modules:

• share Zoe/ERTP libraries among contracts #2391

in the shorter term, there's some possible clean-up we are looking into:

• End runtime imports of types modules #6512

[dckc]

TIL:

On November 22, 2016 the Spurious Dragon hard-fork introduced EIP-170 which added a smart contract size limit of 24.576 kb.
-- Downsizing contracts to fight the contract size limit | ethereum.org

using for also seems interesting

[dckc]

Also on the topic of storage cost...

• 2018-11: EIP-1682: Storage Rent (withdrawn)
• 2021-03: spacebank: vat storage rental economics · Issue #2631 · Agoric/agoric-sdk
  • including some notes about Solana storage rental

[dckc]

99% reduction under discussion

Speaking of Subject to Governance:

• Proposal to Reduce the Cost of Installing a Bundle on Agoric Blockchain - Governance - Agoric Community Forum

UI for on-chain proposal

An on-chain proposal involves just the right agd command with just the right .json file. The first time I/we did it, we goofed and had to fix it in a follow-up proposal:

• Proposal #7 Fix formatting of governance parameters
  • fix-gov-params.json
  • Agoric – Staking Rewards and Genesis Parameter Updates

So this time, it would be nice to have a friendly UI for it. To that end, I opened an issue on the nifty new gov-proposal-hub:

• parameter change: swingset storageByte 0xpatrickdev/agoric-gov-proposal-hub#10

And this weekend I mostly got it working:

• feat: bundle storage price change proposal 0xpatrickdev/agoric-gov-proposal-hub#18

Reference Doc for Swingset Params

It's still a little opaque. It seems like there should be some reference documentation for things like storageByte. I can't find any. All I find is the code of the chargeAdmission function along with the PR and issue whence it came:

• insufficient cost recovery for InstallBundle message handling #6858
• feat: add new bean cost for bytes in permanent storage #7290

The swingset Params message doesn't specify storageByte. It just has a beans_per_unit array in which storageByte is one of the items.