Mint(batch) - tx

Mint 𝔉rc20 token

Example of Fixes Inscription data string:

op=mint,tick=fixes,amt=1000.0

Transaction parameters:

Key	Required	FType	Description
tick		t.String	Ticker: identity of the 𝔉rc20 token
amt		t.UFix64	Amount to mint: States the amount of the 𝔉rc20 token to mint. Has to be less or equal to "limit"
repeats		t.UInt64	How many times to repeat the mint action. Better less than or equal to 100 times.

Transaction code example:

import txBatchMintFRC20 from "@fixes/contracts/transactions/batch-mint-frc20.cdc?raw";
import txMintFRC20 from "@fixes/contracts/transactions/mint-frc20.cdc?raw";

async function mint(
  tick: string,
  amt: number,
  repeats: number = 1
) {
  let txid: string;
  if (repeats > 1) {
    txid = await flow.sendTransaction(txBatchMintFRC20, (arg, t) => [
      arg(tick, t.String),
      arg(amt.toFixed(8), t.UFix64),
      arg(repeats, t.UInt64),
    ]);
  } else {
    txid = await flow.sendTransaction(txMintFRC20, (arg, t) => [
      arg(tick, t.String),
      arg(amt.toFixed(8), t.UFix64),
    ]);
  }
  return txid;
}

Transaction source code

https://github.com/fixes-world/fixes/blob/main/cadence/transactions/batch-mint-frc20.cdc

import "FungibleToken"
import "FlowToken"
import "FRC20Indexer"
import "Fixes"
import "FixesInscriptionFactory"

transaction(
    tick: String,
    amt: UFix64,
    repeats: UInt64
) {
    prepare(acct: auth(Storage, Capabilities) &Account) {
        /** ------------- Prepare the Inscription Store - Start ---------------- */
        let storePath = Fixes.getFixesStoreStoragePath()
        if acct.storage
            .borrow<auth(Fixes.Manage) &Fixes.InscriptionsStore>(from: storePath) == nil {
            acct.storage.save(<- Fixes.createInscriptionsStore(), to: storePath)
        }

        let store = acct.storage
            .borrow<auth(Fixes.Manage) &Fixes.InscriptionsStore>(from: storePath)
            ?? panic("Could not borrow a reference to the Inscriptions Store!")
        /** ------------- End -------------------------------------------------- */

        // Get a reference to the signer's stored vault
        let vaultRef = acct.storage
            .borrow<auth(FungibleToken.Withdraw) &FlowToken.Vault>(from: /storage/flowTokenVault)
        ?? panic("Could not borrow reference to the owner's Vault!")

        // Get a reference to the Fixes Indexer
        let indexer = FRC20Indexer.getIndexer()
        let tokenMeta = indexer.getTokenMeta(tick: tick)
        assert(tokenMeta != nil, message: "TokenMeta for tick ".concat(tick).concat(" does not exist!"))

        let insDataStr = FixesInscriptionFactory.buildMintFRC20(tick: tick, amt: amt)

        var i = 0 as UInt64
        while i < repeats {
            i = i + 1

            let tokenMeta = indexer.getTokenMeta(tick: tick)
            if tokenMeta!.max == tokenMeta!.supplied {
                break
            }

            // estimate the required storage
            let estimatedReqValue = FixesInscriptionFactory.estimateFrc20InsribeCost(insDataStr)

            // get reserved cost
            let flowToReserve <- (vaultRef.withdraw(amount: estimatedReqValue) as! @FlowToken.Vault)

            // Create the Inscription first
            let newInsId = FixesInscriptionFactory.createAndStoreFrc20Inscription(
                insDataStr,
                <- flowToReserve,
                store
            )

            // borrow a reference to the new Inscription
            let insRef = store.borrowInscriptionWritableRef(newInsId)
                ?? panic("Could not borrow a reference to the newly created Inscription!")

            /// Mint the FRC20 token
            indexer.mint(ins: insRef)
        }
    }
}

Or mint simple inscription

https://github.com/fixes-world/fixes/blob/main/cadence/transactions/mint-frc20.cdc

Related docs

• EstimateCost - read

• How to send a transaction to Flow blockchain or query data from Flow blockchain?