Bitcoin Talks

If you are moving from a centralised exchange to your own wallet, Arbswap is a decentralised Arbitrum exchange that uses liquidity pools for swaps and farming; you need tokens and ETH for gas on the same network. For an Arbswap token swap or liquidity position, Arbswap lets you trade, deposit into a pool and farm rewards. How Does the Arbswap Exchange Work? An automated market maker (AMM) quotes trades against liquidity pools funded by users instead of matching your order with another trader. Think of a pool as a vending machine stocked with two tokens: take one out, put the other in, and the price adjusts as its stock changes. Your wallet sends a transaction to a contract, which updates the pool balances and sends you the output tokens. Say a simple pool holds 100 ETH and 200,000 USDC: the starting price is near 2,000 USDC per ETH. Buying one ETH costs about 2,020 USDC before fees because that trade moves the pool price. A larger trade moves it further; the difference from the starti...

Reconcile each payout against both its Ethereum deposit and its Polygon receipt. Record the source transaction hash, token contract, recipient, amount, and destination transaction hash, then match the received token by its Polygon contract address. This gives finance a traceable record even when the two networks show separate transactions. Track the bridge transfer across both networks A bridge transfer is like sending a parcel through a depot: the Ethereum transaction records what entered the system, and a separate Polygon transaction records what arrived. For a standard Polygon PoS deposit, the Ethereum side locks the token through bridge contracts; RootChainManager coordinates the deposit, and a corresponding token is credited on Polygon. That separation matters for bookkeeping. An Ethereum transaction marked successful proves the source transaction executed; it does not, by itself, prove the recipient has the expected Polygon balance. For an operational route between Ethereum and P...

If you are comparing ways to swap tokens on Base, set slippage tolerance to cover plausible price movement before execution, while keeping the minimum output high enough to reject a poor fill. The right value depends on the pool, trade size, and how long the transaction may wait—not simply on how volatile the token looks. For the broader walkthrough of how BaseSwap swaps tokens , see the article covering BaseSwap, pools, and farms; this guide focuses on the execution limit to choose when swapping. BaseSwap is a decentralized exchange on Base where that limit matters because a quoted swap still has to execute against pool state that can change. Slippage tolerance sets a minimum acceptable output For an exact-input swap, tolerance converts the quoted output into an on-chain floor: minimum output = quoted output × (1 − tolerance) . At 0.50% tolerance, a quote of 1,000 USDC permits execution down to 995 USDC; below that, the transaction reverts instead of delivering a worse result. This c...

A Polygon PoS withdrawal can pause after the tokens leave your Polygon wallet. That wait is usually for a checkpoint: a periodic record of Polygon blocks that validators publish to Ethereum. Knowing when checkpoints happen helps you estimate the delay, understand why it varies, and avoid repeating a withdrawal that is already in progress. Checkpoints batch Polygon activity for Ethereum A checkpoint is a cryptographic summary of a range of Polygon PoS blocks, submitted to Ethereum by Polygon’s validator system. Polygon produces blocks continuously, but Ethereum receives these summaries in batches rather than with every Polygon transaction. That batching matters when you withdraw through the Polygon PoS Bridge. The withdrawal starts on Polygon by burning the bridged tokens; the checkpoint lets the Ethereum side verify that burn before it releases the corresponding tokens there. A deposit from Ethereum to Polygon follows a different flow and does not wait for this withdrawal checkpoint. ...

Bridge after your deployment wallet and contract dependencies are ready, then fund that wallet on Mantle. A smart contract is a program stored on a blockchain. If you plan to deploy it on Mantle, the wallet must have funds there for the deployment and its gas, the network’s fee for processing the transaction. For a transfer from Ethereum, the Mantle Bridge is a way to move supported assets to Mantle. Check which asset you need for deployment: Mantle uses MNT for gas, and another token may not cover that cost. mantlebridge.org is a service for moving supported assets between Ethereum and Mantle. The transfer may take time while the source transaction is confirmed and the destination balance updates. Prepare the wallet and contract first Confirm the wallet address you will deploy from, and check that your contract and any libraries work on Mantle. Mantle uses the Ethereum Virtual Machine (EVM), the software rules that run many Ethereum smart contracts, but an app or outside service you...

Token approvals may follow an XMR bridge payout because the payout puts a token in your wallet, and a later smart contract needs permission to spend it. The approval belongs to that later transaction; it is not a step required for the token to arrive. For the separate cross-chain process, see how an XMR bridge routes swaps ; this article focuses on the allowance that may come next. A payout and an approval change different things A token payout is a transfer to your address. On an EVM chain, an ERC-20 transfer updates the token contract’s balances; it does not give the sender permission to spend other tokens already in your wallet. The payout transaction and any later approval are separate on-chain actions. An ERC-20 approval sets an allowance: a token contract records how many units an owner permits a particular spender address to move using transferFrom. Under EIP-20, calling approve(spender, value) replaces the existing allowance with value. A DEX router, payment contract, or other...

The Energy factor is a contract-specific multiplier that can raise the Energy charged for a TRON smart-contract call above its normal execution cost. It changes with the contract’s usage across maintenance periods, so a popular contract can cost more to call even when the function and inputs stay the same. What changes when a contract gets busy? The TVM calculates a call’s base Energy from the instructions it executes, then applies the contract’s current factor: actual Energy = floor(base Energy × (1 + factor)) . The factor is stored at a scale of 10,000, so an API value of 5,000 means a factor of 0.5, or 50% extra Energy. TRON’s Dynamic Energy Model tracks a contract’s base Energy use during each maintenance period. If usage exceeds the network threshold, its factor rises for the next period; if usage falls below the threshold, the factor gradually declines. The model is contract-specific: activity on one busy contract does not directly raise the factor for every contract. For example...

A DEX swap fee can be shared between liquidity providers and a protocol treasury. To understand the split, follow one trade: see what the trader pays, what stays in the pool for providers, and what the protocol accounts for separately. The percentages depend on the pool’s contracts and settings. The swap fee is separate from the Base network transaction fee. Liquidity providers usually earn their share in proportion to their pool ownership. A treasury share can reduce provider earnings, even when the pool’s total trading volume is unchanged. What does a fee split divide? A fee split divides the fee charged by a pool when someone trades through it. A trader’s transaction also uses Base network resources, so the network charges a separate transaction fee; that amount is not the pool’s treasury share. On Base, BaseSwap is a place to swap tokens or supply liquidity, while the pool’s contracts determine how its trading fees are handled. Liquidity providers, often called LPs, deposit tokens...

A transfer is complete only when the destination chain records the expected asset. A successful transaction on the chain you sent from is just the first checkpoint: a cross-chain route may still need to relay data, wait for confirmations, and execute a second transaction. What counts as a completed transfer? Look for the expected token on the destination network and a successful destination-chain transaction. A source transaction marked “success” means that chain accepted the initial action; it does not prove that the other chain has delivered your asset. Think of the route as a sequence: your wallet authorises a source transaction, a bridge or protocol verifies it, and a destination transaction releases or creates the asset. Some routes also swap tokens along the way. For example, a route can convert your starting asset into an intermediate one before delivering a different token to your wallet. This distinction matters when you use an aggregator such as Rango bridge: the route may in...

In a V3 pool, a position set from $1,800 to $2,200 per ETH earns swap fees only while ETH stays between those prices. That range determines where your deposited tokens help traders swap. Choosing a range means weighing potential fee income against how often you want to manage your position. Full-range liquidity: when does a wide range fit? Full-range liquidity spreads your tokens across a very broad span of possible prices. It can keep working as the market price moves up or down, so you are less likely to stop earning fees because the price crossed a boundary. The trade-off is that much of your capital may sit far from the current price, where few swaps happen. A concentrated position can make more of the same deposit available around the price where trading is active. That can support deeper swaps, but it does not guarantee that you will earn more. Consider a new ETH/USDC liquidity provider who expects to leave funds alone. A broad range may suit that plan better than a tight band th...

A permit signature can simplify a Polygon Bridge deposit by letting a compatible token grant spending permission without a separate approval transaction. You sign a message, then a bridge transaction can use that permission to move your tokens. The signature alone does not move funds or pay the network fee. What does a permit signature change? A permit is a signed instruction that gives a named contract permission to spend a set amount of your tokens. That permission is called an allowance. With the common ERC-2612 standard, the instruction includes the token owner, spender, amount, deadline and a number called a nonce. The nonce is a one-time counter that helps prevent someone from reusing an old signature. The deadline sets the last time the signature can be submitted. A permit is tied to a specific token contract and chain, so a signature for one token or network should not work for another. Normally, you first send an on-chain approval transaction, which costs gas, then send a dep...