0x OrderBook API

[nassirian]

Hi,
i have a question,
getting lists of orders from API sometimes there are some orders that partially filled. so the remainingFillableTakerAmount is not match with takerAmount.
so in this case i know how much takerAmount remain to fill the order but how can i get remaining makerAmount?

here is the sample
{
order: {
signature: {
signatureType: 2,
r: '0xaea5ba688652d721d217e0f1ab497ffb374a1d12957b3f7e530792779d4ed5d7',
s: '0x76678e4e4a6c68123d188aee67f06ab6b1fa45c121e275ec0fe62f503f875011',
v: 27
},
sender: '0x0000000000000000000000000000000000000000',
maker: '0xffc2ac30f4de505f35040db3cb94d2b657c4d62a',
taker: '0x0000000000000000000000000000000000000000',
takerTokenFeeAmount: '0',
makerAmount: '500000000000000',
takerAmount: '1655000000',
makerToken: '0x34f0915a5f15a66eba86f6a58be1a471fb7836a7',
takerToken: '0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48',
salt: '1656080555',
verifyingContract: '0xdef1c0ded9bec7f1a1670819833240f027b25eff',
feeRecipient: '0x86003b044f70dac0abc80ac8957305b6370893ed',
expiry: '1656685355',
chainId: 1,
pool: '0x0000000000000000000000000000000000000000000000000000000000000000'
},
metaData: {
orderHash: '0xfd6b0fad03c48e3b3d73695ee525bfca0e785f1bada515d7a5e07df522ee0c1c',
remainingFillableTakerAmount: '12051369',
createdAt: '2022-06-24T14:22:37.277Z'
}
}

[ndbls]

The ratio of remaining fillable takerToken to the total takerToken is the same as the ratio of the remaining fillable makerToken to the total makerToken.

Basically, you just calculate a fractional amount of total makerToken based on the takerToken ratio and floor the result:

floor((remainingFillableTakerAmount / takerAmount) * makerAmount) = remainingFillableMakerAmount

If you are doing it in solidity or in js with some BigNumber library that cuts off decimal places, you will want to do it like this:

remainingFillableTakerAmount * makerAmount / takerAmount = remainingFillableMakerAmount

You can see an example of that here (and this is the math part).

And to answer your specific case:

floor((12051369 / 1655000000) * 500000000000000) = 3640896978851

[nassirian]

@abls thanks make sense

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.