Mint NFT

mint nft in Loopring layer2, only can mint ERC1155 in layer2 now

EndPoint

POST api/v3/nft/mint

Header

Field	Description	Example
X-API-KEY	ApiKey	"HlkcGxbqBeaF76j4rvPaOasyfPwnkQ6B6DQ6THZWbvrAGxzEdulXQvOKLrRWZLnN"

Request

Query Param	Description	Example
exchange	exchangeAddress in exchange info
minterAddress	minter address	"0x2aa52B5fc52c9BD3Bc7555AAB1f565f06baafF5D"
minterId	minter accountID	10110
toAddress	(Optional) to address
toAccountId	to accountId	10111，can set to 0 if dont have
nftType	0 for ERC1155, 1 for ERC721, now only support ERC1155	0
tokenAddress	tokenAddress, computed by	"0x2aa52B5fc52c9BD3Bc7555AAB1f565f06baafF5D"
nftId	nftId, TODO: add link	"0x3b65907396d1259f85e649531a43380aab7cfab61475f129783da7d6a6c257f1"
amount	how many tokens to be mint.	"1"
royaltyPercentage	fee to the creator of each NFT transaction. 1 ~ 10, percentage	1, means 1%
maxFee	TokenAmountInfo, minter fee, request type is 9
storageId	the offchain id of fee token	1
validUntil	Timestamp for transfer to become invalid, seconds	normally current time + 2 months
eddsaSignature	eddsa signature of the eddsa hash
royaltyAddress	(Optional) fee to the address, default is minter address	"0x2aa52B5fc52c9BD3Bc7555AAB1f565f06baafF5D"
counterFactualInfo	(Optional) counterFactual Wallet Info	if it's counterFactual wallet, need pass the info

Response

Field	Description	Example
hash	The hash identifier set by the user at the time of submission, can use this hash to get the transfer info	"0x1d923ca783 4dc90484fa2e b611f0f0bc7e 741bb107007e bea19ba8caea b4f9d3"
status	Whether the order was successfully submitted or not, please note, user may query after a while to get real process status, as most offchain requests are async processed Allowable : ['received', 'processing', 'processed', 'failed']	"received"
isIdempotent	Idempotent of submit transfer response, submit same transfer again idempotent will be true	"false"

Model

NftTokenAmountInfo

Wrapper object used to describe a token associated with a certain quantity.

Field	Description	Example
tokenId	The Loopring's NFT token identifier.	32769
amount	The amount of the NFT token	"2"
nftData	The Loopring's NFT token data identifier which is a hash string of NFT token address and NFT_ID	"0xf7c932351186c3a9053f313eefa16209c018f7f1dba8aa 8ca7100400f7c31085"

TokenAmountInfo

ERC20 token amount info, used for fee here

Field	Description	Example
tokenId	The Loopring's ERC20 token identifier.	0
amount	The amount of the ERC20 token	"10000000000000000"

counterFactualInfo

counterFactual Wallet Info

Field	Description	Example
walletFactory	Counter factual wallet factory contract address	"0xbbbbca6a90 1c926f240b89 eacb641d8aec 7aeafd"
walletOwner	Counter factual wallet owner address, NOT the wallet address	"0xbbbbca6a90 1c926f240b89 eacb641d8aec 7aeafd"
walletSalt	Salt to generate address from owner & other related info	"1"

Compute eddsa hash

export function getNftData(request: NFTMintRequestV3) {
  const hasher = Poseidon.createHash(7, 6, 52);
  const nftIdHi = new BN(request.nftId.substr(2, 32), 16).toString(10);
  const nftIdLo = new BN(request.nftId.substr(2 + 32, 32), 16).toString(10);
  const inputs = [
    request.minterAddress,
    request.nftType,
    request.tokenAddress,
    nftIdLo,
    nftIdHi,
    request.royaltyPercentage,
  ];
  return hasher(inputs).toString(10);
}

const inputs = [
    new BN(ethUtil.toBuffer(request.exchange)).toString(),
    request.minterId,
    request.toAccountId,
    getNftData(request),
    request.amount,
    request.maxFee.tokenId,
    request.maxFee.amount,
    request.validUntil,
    request.storageId,
  ];
  const hasher = Poseidon.createHash(inputs.length + 1, 6, 53);
  const hash = hasher(inputs).toString(10);