feat(genesis): update devnet configuration and parameters

[anunay-xin]

• Changed Devnet chain ID from 5551 to 551 across multiple files.
• Updated maximum masternodes from 108 to 18(10 masternodes/3 protector/5 observer(max is 10 observer)) in genesis and related configurations.
• Adjusted foundation wallet address and reward parameters in devnet.json.
• Enhanced genesis input structure to include max nodes for masternodes, protectors, and observers.
• Fixed network selection documentation to reflect the new chain ID for devnet.

Proposed changes

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• build: Changes that affect the build system or external dependencies
• ci: Changes to CI configuration files and scripts
• chore: Changes that don't change source code or tests
• docs: Documentation only changes
• feat: A new feature
• fix: A bug fix
• perf: A code change that improves performance
• refactor: A code change that neither fixes a bug nor adds a feature
• revert: Revert something
• style: Changes that do not affect the meaning of the code
• test: Adding missing tests or correcting existing tests

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• Consensus
• Account
• Network
• Geth
• Smart Contract
• External components
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Checklist

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• This PR has sufficient test coverage (unit/integration test) OR I have provided reason in the PR description for not having test coverage
• Tested on a private network from the genesis block and monitored the chain operating correctly for multiple epochs.
• Provide an end-to-end test plan in the PR description on how to manually test it on the devnet/testnet.
• Tested the backwards compatibility.
• Tested with XDC nodes running this version co-exist with those running the previous version.
• Relevant documentation has been updated as part of this PR
• N/A

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[Copilot]

Pull request overview

This PR updates the built-in devnet chain configuration/genesis parameters (including a new chain ID and updated XDPoS v2 limits/reward settings) and extends the puppeth genesis wizard input to optionally supply v2 seat limits. It also refreshes tests and operator docs so the built-in network selection behavior matches the new devnet identity.

Changes:

• Update devnet identity/config: chain ID 5551 -> 551, new genesis hash, updated XDPoS reward/foundation address, and updated v2 config seat limits.
• Refresh backfill tests and upgrade documentation to reference the new devnet chain ID.
• Extend puppeth genesis input to include v2 max seats (masternodes/protectors/observers).

Reviewed changes

Copilot reviewed 6 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
params/config_networks.go	Updates built-in devnet genesis hash, chain ID, and devnet XDPoS/v2 parameter schedules (including seat limits).
params/config_backfill_test.go	Adjusts backfill tests to use the new devnet chain ID value.
docs/upgrade.md	Updates operator docs to reflect devnet chain ID 551 in network selection and migration guidance.
core/genesis.go	Updates the built-in devnet genesis block fields (extraData/timestamp) to match the new devnet config.
cmd/utils/flags.go	Ensures --devnet default NetworkId reflects the new chain ID and mapping comments are updated.
cmd/puppeth/wizard_genesis.go	Adds genesis input fields for v2 seat limits and applies them during non-interactive genesis generation.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 9 changed files in this pull request and generated 1 comment.

Suppressed comments (2)

core/genesis.go:934

• Devnet genesis contents and the enforced params.DevnetGenesisHash are both updated in this PR, but there’s no test asserting DefaultDevnetGenesisBlock().ToBlock().Hash() matches params.DevnetGenesisHash (unlike mainnet/testnet coverage). A mismatch here would silently break built-in devnet detection and config enforcement.

// DefaultDevnetGenesisBlock returns the XDC devnet genesis block.
func DefaultDevnetGenesisBlock() *Genesis {
	return &Genesis{
		Config:     params.DevnetChainConfig,
		Nonce:      0,
		ExtraData:  hexutil.MustDecode("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"),
		GasLimit:   4700000,
		Difficulty: big.NewInt(1),
		Alloc:      DecodeAllocJson(DevnetAllocData),
		Timestamp:  1785709299,
	}

cmd/puppeth/wizard_genesis.go:86

• validateGenesisInput dereferences input without a nil guard. Because the YAML decoder is decoding into a **GenesisInput (decoder.Decode(&input)), a YAML file containing null can set input to nil, which would panic during validation.

func validateGenesisInput(input *GenesisInput) error {
	if input.MaxMasternodes < 0 {
		return fmt.Errorf("maxMasternodes must be non-negative, got %d", input.MaxMasternodes)
	}
	if input.MaxProtectorNodes < 0 {

[Copilot]

Pull request overview

Copilot reviewed 5 out of 7 changed files in this pull request and generated no new comments.