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Implement Stake Pre-Splitting #444

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Implement Stake Pre-Splitting #444

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c9476ce
add: Stake Splitting for improved staking efficiency
JSKitty Oct 31, 2024
d096447
fix: use TxBuilder's `valueOut` instead of the user's `value` input
JSKitty Oct 31, 2024
aca0134
Prettier
JSKitty Oct 31, 2024
924bcac
refactor: add review suggestion
JSKitty Nov 1, 2024
8d53871
Merge branch 'master' into stake-splitting
panleone Nov 4, 2024
8a69f52
fix: eqeqeq linting error
JSKitty Nov 8, 2024
ab3a1a0
fix: avoid delegating dust
JSKitty Nov 8, 2024
ae7e05a
Merge branch 'master' into stake-splitting
panleone Nov 8, 2024
e0dec6a
Merge branch 'master' into stake-splitting
panleone Nov 18, 2024
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6 changes: 4 additions & 2 deletions chain_params.prod.json
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,8 @@
"proposalFeeConfirmRequirement": 6,
"maxPaymentCycles": 6,
"maxPayment": 43200000000000,
"defaultColdStakingAddress": "SdgQDpS8jDRJDX8yK8m9KnTMarsE84zdsy"
"defaultColdStakingAddress": "SdgQDpS8jDRJDX8yK8m9KnTMarsE84zdsy",
"stakeSplitTarget": 50000000000
},
"testnet": {
"name": "testnet",
Expand Down Expand Up @@ -64,6 +65,7 @@
"proposalFeeConfirmRequirement": 3,
"maxPaymentCycles": 20,
"maxPayment": 144000000000,
"defaultColdStakingAddress": "WmNziUEPyhnUkiVdfsiNX93H6rSJnios44"
"defaultColdStakingAddress": "WmNziUEPyhnUkiVdfsiNX93H6rSJnios44",
"stakeSplitTarget": 50000000000
}
}
6 changes: 4 additions & 2 deletions chain_params.test.json
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,8 @@
"proposalFeeConfirmRequirement": 3,
"maxPaymentCycles": 20,
"maxPayment": 144000000000,
"defaultColdStakingAddress": "WmNziUEPyhnUkiVdfsiNX93H6rSJnios44"
"defaultColdStakingAddress": "WmNziUEPyhnUkiVdfsiNX93H6rSJnios44",
"stakeSplitTarget": 50000000000
},
"testnet": {
"name": "testnet",
Expand Down Expand Up @@ -54,6 +55,7 @@
"proposalFeeConfirmRequirement": 3,
"maxPaymentCycles": 20,
"maxPayment": 144000000000,
"defaultColdStakingAddress": "WmNziUEPyhnUkiVdfsiNX93H6rSJnios44"
"defaultColdStakingAddress": "WmNziUEPyhnUkiVdfsiNX93H6rSJnios44",
"stakeSplitTarget": 50000000000
}
}
22 changes: 16 additions & 6 deletions scripts/wallet.js
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Expand Up @@ -1100,11 +1100,20 @@ export class Wallet {
// Add primary output
if (isDelegation) {
if (!returnAddress) [returnAddress] = this.getNewAddress(1);
transactionBuilder.addColdStakeOutput({
address: returnAddress,
addressColdStake: address,
value,
});
// The per-output target for maximum staking efficiency
const nTarget = cChainParams.current.stakeSplitTarget;
// Generate optimal staking outputs
for (let i = 0; i <= Math.floor(value / nTarget); i++) {
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I see the problem here, but I would prefer that the whole value is staked... what about something like this?

Suggested change
for (let i = 0; i <= Math.floor(value / nTarget); i++) {
if(value < COIN) {
throw new Error("below consensus);
} else if (value < nTarget) {
transactionBuilder.addColdStakeOutput({
address: returnAddress,
addressColdStake: address,
value,
});
} else {
for (let i = 0; i < Math.floor(value / nTarget); i++) {
transactionBuilder.addColdStakeOutput({
address: returnAddress,
addressColdStake: address,
value: i == 0 ? nTarget + (value % nTarget) : nTarget,
});
}
}

const nOutAmount = i === 0 ? value % nTarget : nTarget;
// Skip 'dust' outputs (TODO: this should be `1 * COIN` as it is the consensus minimum, but tests are below this and will break)
// ... it's still better than no check, or `Stake 5 PIV` would create a 0-value remainder and fail.
if (nOutAmount < 0.05 * COIN) continue;
transactionBuilder.addColdStakeOutput({
address: returnAddress,
addressColdStake: address,
value: nOutAmount,
});
}
} else if (isProposal) {
transactionBuilder.addProposalOutput({
hash: address,
Expand Down Expand Up @@ -1134,7 +1143,8 @@ export class Wallet {
}

const fee = transactionBuilder.getFee();
const changeValue = transactionBuilder.valueIn - value - fee;
const changeValue =
transactionBuilder.valueIn - transactionBuilder.valueOut - fee;
if (changeValue < 0) {
if (!subtractFeeFromAmt) {
throw new Error('Not enough balance');
Expand Down
1 change: 1 addition & 0 deletions tests/unit/wallet/transactions.spec.js
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Expand Up @@ -165,6 +165,7 @@ describe('Wallet transaction tests', () => {
});

it('Creates a cold stake tx correctly', async () => {
// TODO: rewrite this test over >1 PIV to match PIVX Consensus, and to also test Stake Splitting
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update the test in this PR

const tx = wallet.createTransaction(
'SR3L4TFUKKGNsnv2Q4hWTuET2a4vHpm1b9',
0.05 * 10 ** 8,
Expand Down
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