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Main Pool Protocol

There are two protocols involved in staking 1. The ERC-20 Pooling and Rewards Protocol [Join Pool](/sdo20ZqURiyXL5qQsIO7nw) 2. Hosting a Node

  1. $EDI ERC-20 Overview

  2. $xEDI Overview

  3. Staking Pool

  4. Governance

  5. Network Operators

    1. Authority.

    2. Validators.

    3. Signers.

    4. Heartbeat.

  6. Network Tenents


Smart Contract Overview
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Contract Description
-– -–
Staking Contract An upgradeable contract that implements staking
Staking Proxy Stores staking state and delegates to the Staking Contract
Registry Enables Pools to form that users may wish to delegate
Registry Enables Pools to form that users may wish to delegate
$EDI Vault Securely holds staked $EDI Tokens
$EDI Treasury Securely holds $EDI Tokens for payouts

Payout Formula

Staking rewards payout in $EDI, but can also payout in additional tokens, such as $DAI or $USDC depending on your jurisdiction.

Staking Pools can be thought of as a delegated pool: Network Operators must form a pool in order to provide services. Some Network Operators may not have enough $EDI tokens in order to be able to do so. Others may have enough but also want to provide liquidity to the market. This system enables Network Operators the flexibility of both.

$$  r=R \times\left(\frac{f}{F}\right)^{\alpha} \times\left(\frac{d}{D}\right)^{1-a}  $$
Term Definition
-– -–
r Reward for a specific pool.
R Total reward to be split between all pools.
f Total fees earned by the pool during a specific rotation period/epoch.
F Total fees earned across all (staked) pools this epoch.
d Total weighted $EDI staked by the pool this epoch.
D Total weighted $EDI staked across all (active) pools this epoch.
α A constant in the range \[0..1\] that determines the weight of fees vs stake.

Basic Functionalities

The contract offers three basic functionalities.

  1. $EDI token owner can deposit and withdraw from the contract

  2. $EDI withdrawls are a 30-day cooldown, meaning it wont unlock for 30 days.

  3. Migration of Pools: Authority nodes run an adversarial "red" vs. "blue " mode, meaning after every epoch (600,000 blocks) a migration takes place

Stakers themselves are the only ones that can opt-in to migrate their tokens from the current contract to the new one. As Stakers opt-in to new contracts, the migration manager cannot access nor prevent them from withdrawing their tokens.


approve() + stake() + unstake() + withdraw() + restake()

Incident Response Manager

The IRM module can

  • Disable staking operations

  • Release all stakes

  • Update the address of the emergency manager

Migration manager that can, in an administrative capacity during the initial period after the launch of the network:

  • Add or remove migration destinations.

  • Update the stake change notifier.

  • Update the address of the migration manager.

Administrative Processes

Migration Pathway

The migration flow allows users to opt-in to migrate their staked tokens to a new staking contract. Alternatively, a user can unstake, wait for the cooldown period to end, withdraw and stake in a new contract, but this would imply that the tokens are not staked during the cooldown period.

The Migration process:

  1. The migration manager may propose (up to MAX_APPROVED_STAKING_CONTRACTS) distinct "migration destination" contracts.

  2. Users may decide to migrate their staked tokens to any one of these contracts using the migrateStakedTokens() function. Note that the destination contracts only need to implement the IMigratableStakingContract() and could differ in many aspects relative to the existing IStakingContract specifications.

  3. Once requested, the existing contract will call ERC20 approve and the acceptMigration() function of the new contract (part of the IMigratableStakingContract interface), which will move the stake to the new contract.

Distributing Rewards

The distributeRewards() helper function allows staking on behalf of different users in batch (e.g., like calling acceptMigration() multiple times).

This function is meant to be called by a network operator whenever it needs to distribute staking rewards, which will be distributed as new staked tokens. Similarly to the acceptMigration() function

Since distributeRewards() and withdrawReleasedStakes() are batched operations, their caller should provide enough gas for the entire batch in order to successfully distribute rewards to their pool members.



Additional Features

Payout Estimator

Last update: June 27, 2020