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authorAlex Browne <stephenalexbrowne@gmail.com>2018-07-27 05:11:03 +0800
committerAlex Browne <stephenalexbrowne@gmail.com>2018-08-09 05:27:30 +0800
commit6a5965d73bb542634631d7af76c150795d899744 (patch)
treeaba6597779094b9738c0ad94fb2694a18d22cdc2 /packages/base-contract/src
parent19cda0eb036b6876964d8074aea1295142d25027 (diff)
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Add strictArgumentEncodingCheck to BaseContract and use it in contract templates
Diffstat (limited to 'packages/base-contract/src')
-rw-r--r--packages/base-contract/src/index.ts17
1 files changed, 17 insertions, 0 deletions
diff --git a/packages/base-contract/src/index.ts b/packages/base-contract/src/index.ts
index a240fb8b6..e354f109e 100644
--- a/packages/base-contract/src/index.ts
+++ b/packages/base-contract/src/index.ts
@@ -82,6 +82,23 @@ export class BaseContract {
}
return txDataWithDefaults;
}
+ // Throws if the given arguments cannot be safely/correctly encoded based on
+ // the given inputAbi. An argument may not be considered safely encodeable
+ // if it overflows the corresponding Solidity type, there is a bug in the
+ // encoder, or the encoder performs unsafe type coercion.
+ public static strictArgumentEncodingCheck(inputAbi: DataItem[], args: any[]): void {
+ const coder = (ethers as any).utils.AbiCoder.defaultCoder;
+ const params = abiUtils.parseEthersParams(inputAbi);
+ const rawEncoded = coder.encode(params.names, params.types, args);
+ const rawDecoded = coder.decode(params.names, params.types, rawEncoded);
+ for (let i = 0; i < rawDecoded.length; i++) {
+ const original = args[i];
+ const decoded = rawDecoded[i];
+ if (!abiUtils.isAbiDataEqual(params.names[i], params.types[i], original, decoded)) {
+ throw new Error(`Cannot safely encode argument: ${params.names[i]} (${original}) of type ${params.types[i]}. (Possible type overflow or other encoding error)`);
+ }
+ }
+ }
protected _lookupEthersInterface(functionSignature: string): ethers.Interface {
const ethersInterface = this._ethersInterfacesByFunctionSignature[functionSignature];
if (_.isUndefined(ethersInterface)) {