refactor: move brother_node development artifact to dev/test-nodes subdirectory

Development Artifact Cleanup:
✅ BROTHER_NODE REORGANIZATION: Moved development test node to appropriate location
- dev/test-nodes/brother_node/: Moved from root directory for better organization
- Contains development configuration, test logs, and test chain data
- No impact on production systems - purely development/testing artifact

✅ DEVELOPMENT ARTIFACTS IDENTIFIED:
- Chain ID: aitbc-brother-chain (test/development chain)
- Ports: 8010 (P2P) and 8011 (RPC) - different from production
- Environment: .env file with test configuration
- Logs: rpc.log and node.log from development testing session (March 15, 2026)

✅ ROOT DIRECTORY CLEANUP: Removed development clutter from production directory
- brother_node/ moved to dev/test-nodes/brother_node/
- Root directory now contains only production-ready components
- Development artifacts properly organized in dev/ subdirectory

DIRECTORY STRUCTURE IMPROVEMENT:
📁 dev/test-nodes/: Development and testing node configurations
🏗️ Root Directory: Clean production structure with only essential components
🧪 Development Isolation: Test environments separated from production

BENEFITS:
✅ Clean Production Directory: No development artifacts in root
✅ Better Organization: Development nodes grouped in dev/ subdirectory
✅ Clear Separation: Production vs development environments clearly distinguished
✅ Maintainability: Easier to identify and manage development components

RESULT: Successfully moved brother_node development artifact to dev/test-nodes/ subdirectory, cleaning up the root directory while preserving development testing environment for future use.

dev/env/node_modules/ethers/lib.commonjs/providers/abstract-signer.js

@@ -0,0 +1,249 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.VoidSigner = exports.AbstractSigner = void 0;
+/**
+ *  Generally the [[Wallet]] and [[JsonRpcSigner]] and their sub-classes
+ *  are sufficient for most developers, but this is provided to
+ *  fascilitate more complex Signers.
+ *
+ *  @_section: api/providers/abstract-signer: Subclassing Signer [abstract-signer]
+ */
+const index_js_1 = require("../address/index.js");
+const index_js_2 = require("../transaction/index.js");
+const index_js_3 = require("../utils/index.js");
+const provider_js_1 = require("./provider.js");
+function checkProvider(signer, operation) {
+    if (signer.provider) {
+        return signer.provider;
+    }
+    (0, index_js_3.assert)(false, "missing provider", "UNSUPPORTED_OPERATION", { operation });
+}
+async function populate(signer, tx) {
+    let pop = (0, provider_js_1.copyRequest)(tx);
+    if (pop.to != null) {
+        pop.to = (0, index_js_1.resolveAddress)(pop.to, signer);
+    }
+    if (pop.from != null) {
+        const from = pop.from;
+        pop.from = Promise.all([
+            signer.getAddress(),
+            (0, index_js_1.resolveAddress)(from, signer)
+        ]).then(([address, from]) => {
+            (0, index_js_3.assertArgument)(address.toLowerCase() === from.toLowerCase(), "transaction from mismatch", "tx.from", from);
+            return address;
+        });
+    }
+    else {
+        pop.from = signer.getAddress();
+    }
+    return await (0, index_js_3.resolveProperties)(pop);
+}
+/**
+ *  An **AbstractSigner** includes most of teh functionality required
+ *  to get a [[Signer]] working as expected, but requires a few
+ *  Signer-specific methods be overridden.
+ *
+ */
+class AbstractSigner {
+    /**
+     *  The provider this signer is connected to.
+     */
+    provider;
+    /**
+     *  Creates a new Signer connected to %%provider%%.
+     */
+    constructor(provider) {
+        (0, index_js_3.defineProperties)(this, { provider: (provider || null) });
+    }
+    async getNonce(blockTag) {
+        return checkProvider(this, "getTransactionCount").getTransactionCount(await this.getAddress(), blockTag);
+    }
+    async populateCall(tx) {
+        const pop = await populate(this, tx);
+        return pop;
+    }
+    async populateTransaction(tx) {
+        const provider = checkProvider(this, "populateTransaction");
+        const pop = await populate(this, tx);
+        if (pop.nonce == null) {
+            pop.nonce = await this.getNonce("pending");
+        }
+        if (pop.gasLimit == null) {
+            pop.gasLimit = await this.estimateGas(pop);
+        }
+        // Populate the chain ID
+        const network = await (this.provider).getNetwork();
+        if (pop.chainId != null) {
+            const chainId = (0, index_js_3.getBigInt)(pop.chainId);
+            (0, index_js_3.assertArgument)(chainId === network.chainId, "transaction chainId mismatch", "tx.chainId", tx.chainId);
+        }
+        else {
+            pop.chainId = network.chainId;
+        }
+        // Do not allow mixing pre-eip-1559 and eip-1559 properties
+        const hasEip1559 = (pop.maxFeePerGas != null || pop.maxPriorityFeePerGas != null);
+        if (pop.gasPrice != null && (pop.type === 2 || hasEip1559)) {
+            (0, index_js_3.assertArgument)(false, "eip-1559 transaction do not support gasPrice", "tx", tx);
+        }
+        else if ((pop.type === 0 || pop.type === 1) && hasEip1559) {
+            (0, index_js_3.assertArgument)(false, "pre-eip-1559 transaction do not support maxFeePerGas/maxPriorityFeePerGas", "tx", tx);
+        }
+        if ((pop.type === 2 || pop.type == null) && (pop.maxFeePerGas != null && pop.maxPriorityFeePerGas != null)) {
+            // Fully-formed EIP-1559 transaction (skip getFeeData)
+            pop.type = 2;
+        }
+        else if (pop.type === 0 || pop.type === 1) {
+            // Explicit Legacy or EIP-2930 transaction
+            // We need to get fee data to determine things
+            const feeData = await provider.getFeeData();
+            (0, index_js_3.assert)(feeData.gasPrice != null, "network does not support gasPrice", "UNSUPPORTED_OPERATION", {
+                operation: "getGasPrice"
+            });
+            // Populate missing gasPrice
+            if (pop.gasPrice == null) {
+                pop.gasPrice = feeData.gasPrice;
+            }
+        }
+        else {
+            // We need to get fee data to determine things
+            const feeData = await provider.getFeeData();
+            if (pop.type == null) {
+                // We need to auto-detect the intended type of this transaction...
+                if (feeData.maxFeePerGas != null && feeData.maxPriorityFeePerGas != null) {
+                    // The network supports EIP-1559!
+                    // Upgrade transaction from null to eip-1559
+                    if (pop.authorizationList && pop.authorizationList.length) {
+                        pop.type = 4;
+                    }
+                    else {
+                        pop.type = 2;
+                    }
+                    if (pop.gasPrice != null) {
+                        // Using legacy gasPrice property on an eip-1559 network,
+                        // so use gasPrice as both fee properties
+                        const gasPrice = pop.gasPrice;
+                        delete pop.gasPrice;
+                        pop.maxFeePerGas = gasPrice;
+                        pop.maxPriorityFeePerGas = gasPrice;
+                    }
+                    else {
+                        // Populate missing fee data
+                        if (pop.maxFeePerGas == null) {
+                            pop.maxFeePerGas = feeData.maxFeePerGas;
+                        }
+                        if (pop.maxPriorityFeePerGas == null) {
+                            pop.maxPriorityFeePerGas = feeData.maxPriorityFeePerGas;
+                        }
+                    }
+                }
+                else if (feeData.gasPrice != null) {
+                    // Network doesn't support EIP-1559...
+                    // ...but they are trying to use EIP-1559 properties
+                    (0, index_js_3.assert)(!hasEip1559, "network does not support EIP-1559", "UNSUPPORTED_OPERATION", {
+                        operation: "populateTransaction"
+                    });
+                    // Populate missing fee data
+                    if (pop.gasPrice == null) {
+                        pop.gasPrice = feeData.gasPrice;
+                    }
+                    // Explicitly set untyped transaction to legacy
+                    // @TODO: Maybe this shold allow type 1?
+                    pop.type = 0;
+                }
+                else {
+                    // getFeeData has failed us.
+                    (0, index_js_3.assert)(false, "failed to get consistent fee data", "UNSUPPORTED_OPERATION", {
+                        operation: "signer.getFeeData"
+                    });
+                }
+            }
+            else if (pop.type === 2 || pop.type === 3 || pop.type === 4) {
+                // Explicitly using EIP-1559 or EIP-4844
+                // Populate missing fee data
+                if (pop.maxFeePerGas == null) {
+                    pop.maxFeePerGas = feeData.maxFeePerGas;
+                }
+                if (pop.maxPriorityFeePerGas == null) {
+                    pop.maxPriorityFeePerGas = feeData.maxPriorityFeePerGas;
+                }
+            }
+        }
+        //@TOOD: Don't await all over the place; save them up for
+        // the end for better batching
+        return await (0, index_js_3.resolveProperties)(pop);
+    }
+    async populateAuthorization(_auth) {
+        const auth = Object.assign({}, _auth);
+        // Add a chain ID if not explicitly set to 0
+        if (auth.chainId == null) {
+            auth.chainId = (await checkProvider(this, "getNetwork").getNetwork()).chainId;
+        }
+        // @TODO: Take chain ID into account when populating noce?
+        if (auth.nonce == null) {
+            auth.nonce = await this.getNonce();
+        }
+        return auth;
+    }
+    async estimateGas(tx) {
+        return checkProvider(this, "estimateGas").estimateGas(await this.populateCall(tx));
+    }
+    async call(tx) {
+        return checkProvider(this, "call").call(await this.populateCall(tx));
+    }
+    async resolveName(name) {
+        const provider = checkProvider(this, "resolveName");
+        return await provider.resolveName(name);
+    }
+    async sendTransaction(tx) {
+        const provider = checkProvider(this, "sendTransaction");
+        const pop = await this.populateTransaction(tx);
+        delete pop.from;
+        const txObj = index_js_2.Transaction.from(pop);
+        return await provider.broadcastTransaction(await this.signTransaction(txObj));
+    }
+    // @TODO: in v7 move this to be abstract
+    authorize(authorization) {
+        (0, index_js_3.assert)(false, "authorization not implemented for this signer", "UNSUPPORTED_OPERATION", { operation: "authorize" });
+    }
+}
+exports.AbstractSigner = AbstractSigner;
+/**
+ *  A **VoidSigner** is a class designed to allow an address to be used
+ *  in any API which accepts a Signer, but for which there are no
+ *  credentials available to perform any actual signing.
+ *
+ *  This for example allow impersonating an account for the purpose of
+ *  static calls or estimating gas, but does not allow sending transactions.
+ */
+class VoidSigner extends AbstractSigner {
+    /**
+     *  The signer address.
+     */
+    address;
+    /**
+     *  Creates a new **VoidSigner** with %%address%% attached to
+     *  %%provider%%.
+     */
+    constructor(address, provider) {
+        super(provider);
+        (0, index_js_3.defineProperties)(this, { address });
+    }
+    async getAddress() { return this.address; }
+    connect(provider) {
+        return new VoidSigner(this.address, provider);
+    }
+    #throwUnsupported(suffix, operation) {
+        (0, index_js_3.assert)(false, `VoidSigner cannot sign ${suffix}`, "UNSUPPORTED_OPERATION", { operation });
+    }
+    async signTransaction(tx) {
+        this.#throwUnsupported("transactions", "signTransaction");
+    }
+    async signMessage(message) {
+        this.#throwUnsupported("messages", "signMessage");
+    }
+    async signTypedData(domain, types, value) {
+        this.#throwUnsupported("typed-data", "signTypedData");
+    }
+}
+exports.VoidSigner = VoidSigner;
+//# sourceMappingURL=abstract-signer.js.map