CoderZhi

Standalone mode cannot grant reward

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### What version of iotex-core are you using (`ioctl version`)? 0.10.0 ### What did you do? If possible, provide a recipe for reproducing the error. reward protocol which queries ProductivityByEpoch...

data corruption

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"evm/evmstatedbadapter.go:480" "msg":"Failed to load root for contract." "error":"failed to find key 5d38c9638907c5226c518951632b4c70ae4f874b792deba7cda3957cff0e1142: not exist in DB" "address": "io1t7pkdvadx2mrnfukzvhsr0xhc2nsjuq9sren7p"

### Description External requests, e.g., block sync, action broadcast, and etc, should not be turned on before the core blockchain services are started. ### Is this a hard-fork (and height...

# Description Merging coreservice and chainservice. Quite a few features inside of chainservice may not be appropriate, but it is out of the scope of this PR. In addition: 1....

add test case that `Add(-1) Sub(-1)` would fail

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add test case that `Add(-1) Sub(-1)` would fail _Originally posted by @dustinxie in https://github.com/iotexproject/iotex-core/pull/3401#discussion_r879993927_

Move config definition into corresponding components

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Right now, most of the configs of different components are defined in config/config.go, and config is used in different components. As a result, the dependency is very complex that loop...

**What would you like to be added**: Add unit tests for db/trie/mptrie/branchnode.go **Why is this needed**: Enhance implementation

**What would you like to be added**: Add unit tests for db/trie/mptrie/leafnode.go **Why is this needed**: Enhance implementation

**What would you like to be added**: **Why is this needed**:

For the last block of each epoch, add the delegates of next round into block header in some way. **What would you like to be added**: **Why is this needed**: